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General 1. What is DC++ 2. What is ADC? 3. What is a hub? 4. What is an Operator 5. FAQ Credits 6. Where to post questions / suggestions ? Installing / Setting up 7. Where can I get the software for windows? 8. Is there a Linux version? 9. Is there a Mac version? 10. Can I import my NMDC queue into DC++? 11. How to share network drives 12. Why do I need active mode? 13. How to set up active mode with a hardware firewall/router? 14. How do I set up active mode with a Linux based firewall/router? 15. How to setup active mode on FreeBSD 16. How can I configure DC++ to use UPnP ? 17. How do I log on as a register user/op? 18. Any websites to help me set DC++ up? 19. Alternative hublists? 20. My university blocks DC++, anything I can do about it? Using DC++ 21. What do the different icons mean? 22. How can I configure DC++ to use it with proxy? 23. What are all the / commands for DC++? 24. Why don't I get any search results? 25. How do I resume my downloads in DC++? 26. How do you resume or overwrite in DC++ from a different user? 27. Whats the meaning of the status bar at the bottom ? 28. Some hubs block me from using DC++. How do I prevent them from doing this? 29. The meaning of the ++ tag 30. What to do if I've been banned? 31. Connection refused by target machine 32. Connection Timeout 33. What does search spy do? 34. How do I use the public hublist filter? 35. How are automatic searches matched? 36. How do I protect myself from search spam in DC++? 37. ‘No users to download from’ - I just added one! 38. What is a Rollback Inconsistency? 39. What is a TTH Inconsistency? 40. What is the anti-fragmentation feature? 41. How does auto-grant slots feature work? 42. What's "All download slots taken" and "No slots available"? 43. What does the light & dark color in the progress bar mean? 44. Slow downloads speeds! 45. What is TTH (Tiger Tree Hashing)? 46. Downloading a file at unrealistic speeds 47. What are magnet links? Abusing 48. Is it possible to removing the ++ tag / make DC++ undetectable? 49. What is Share Faking? 50. What is Slot Locking? 51. What is Tag Faking? Compiling DC++ no entries General 1. What is DC++ Question: What is DC++ Answer: DC++ is an open-source, ad and spyware-free client, written in C++ for the Direct Connect protocol originally developed by Neo-Modus.com, that allows you to share files over the internet with other users. The client is often updated at least once a month for bugs and new features. Original and additional features over NMDC v1 (many now which have found their way into NMDC v2): Much more stable. It wastes less memory, is faster, file size is smaller and long queue wont freeze the whole program. Neo-Modus Direct Connect eats memory and resources. You can connect to many hubs at same time and search for files from all of them with same search. You can continue downloading the same file from other users if somebody leaves. You can see timestamps in the chat. Chat won't jump to end when you roll back old messages. Bot messages wont popup new windows, you can also filter bot messages off. No Ads. Search is more versatile. Hublist is downloadable from multiple servers/sources. Features - Configurable: Automatically search for alternate download locations (0.173) - Allows DC++ to try to find other locations to download your files. Automatic Share Refreshing (0.172) - Every hour DC++ refreshes your share content. Use small send buffer (0.181) - If uploads slow down your downloads A LOT you may try this option. SFV checking (0.22) - Many downloads on DC contain an sfv file to check the integrity of a download. DC++ can on-the-fly calculate CRC-32 values for a file and compare it against the sfv file. If the check fails, the file is automatically downloaded once more from the same user and if that fails, the user is removed as a source. Rollback (0.11) - When resuming a file to ensure it contains no errors. If there is an error DC++ deletes rollback bytes and checks again. Write buffer (0.16) - Anti-fragmentation feature, DC++ saves every X bytes to keep fragmentation low. Language File (0.16) - A XML-file containing most of the text used in DC++. You can specify a file to have DC++ in your favorite language. Logging (0.163) – Log your downloads, uploads, and various chat windows. Network Statistics (0.300) - Go to the View menu -> Network statistics URL handler (0.18) – URLS of the type dchub:// to open in DC++ from your browser. Links in main chat with www, http://, or ftp:// automatically open in your default browser when double-clicked. Slot Closing (0.20) - If a user leaves the hub DC++ will close his slots, if the user is back within 10 minutes DC++ will grant him a slot. Anti-Fragmentation (0.241) - When downloading, it creates a file of the expected target size with unspecified content. Custom Descriptions (0.24) - Custom per-hub user description available for favorite hubs Selectable Hubs to Search (0.301) - You can choose which hubs you want to search in. ADL Search (0.24) - Tool for fast searching of directory listings downloaded from users User Country (0.402) - Show the users country abbreviation in the IP field Features - Non-configurable: File Hashing (0.307) - Merkle trees and tiger hashing are used for file hashing. DC++ user detection (0.11) - Those appear blue. Passive user detection (0.154) - Those that are behind a set of bricks are passive. (detected when the user searches or tries to connect to you) Dupe file removal (0.154) - Files with same name and size are automatically removed from your share and others. Banning Prevention (0.23) - If DC++ receives "banned" during the login phase, it'll stop automatically reconnecting Tab Nick Completion (0.300) - Automatically completes the nickname you are typing by hitting TAB once the name is partially typed. Command History Scrolling (0.302) - Use ctrl-up/down/home/end to view previous things typed. $BZList (0.172) - Sending file lists compressed $GetZBlock (0.302) - Sending files using dynamic compression $MiniSlots (0.13) - Uploading filelists and files <16 kB to other DC++ users WITHOUT requiring a slot $UserIP (0.305) - Server side IP detection (automatically used if the IP field in settings is blank) $NoHello (0.305) - A hub bandwidth easing feature for the hubs that support it. $NoGetINFO (0.301) - A hub bandwidth easing feature for the hubs that support it. ADC Protocol (0.402) - A text protocol for a DC style network 2. What is ADC? Question: What is ADC? Answer: ADC is a new protocol for the DC++ client. It is still under development. The specifications of the protocol can be found here. It adds the capability to do the following: Different shares in each hub Real user identification Nickname changing without having to reconnect Direct client to client searches Higher hub user counts, due to the lack of MyINFO which takes up a considerable amount of bandwidth. Encrypted password transmission (Tiger Hash). DC++ Change Log Related Entries: 0.669: ADC url's clickable (thanks naga), Added initial ADC file transfers support, ADC hub connectivity improved 0.668: Fixes to ADC implementation 0.4034: More ADC fixes (thanks sed) 0.4033: Various ADC patches (thanks sedulus), ADC INF updates only send the necessary info (thanks sed) 0.4032: Fixed an issue with the ADC parser (thanks trem), Fixed an issue with the adc parser (thanks sed) 0.402: Begun work on the ADC protocol (major change) 3. What is a hub? Question: What is a hub? Answer: A "hub" is some kind of router (not in the sense of a Cisco router), which allows clients to connect each other. It's not called a server because it doesn't share any files. It only routes chat, search requests and results. All file transfers is being made directly between clients, not through the hub. One can find hubs to connect to through the various hublists available in the client. A list of alternative hublists can be found here. Read this guide on how to set up your own hub. 4. What is an Operator Question: What is an Operator Answer: An operator is a person who supervises relevance of chat and files being shared. Operators can remove temporary or permanently remove irrelevant users by their own consideration. You can recognize operators from the key icon in the user list (some users with keys can be bots, follow the conversation). 5. FAQ Credits Question: Answer: This FAQ is a collection I’ve pulled together from many sources, including myself (USR56K / BSOD2600). The following have helped with its creation: SourceForge DC++ FAQ (got me started with the basics before I restructured it) ButterflySoul Gadget SeeKay303 tajisen Ender Studio HaArD mai9 cologic Sedulus TheParanoidOne 6. Where to post questions / suggestions ? Question: Where to post questions / suggestions ? Answer: If you want help regarding any of the FAQs in this article, post them on the DC++ forum. If you want to make a useful addition or suggestion to this FAQ, then post it in the DC++ forum, with a subject heading starting out with: FAQ Suggestion: <topic idea>. Installing / Setting up 7. Where can I get the software for windows? Question: Answer: The following is a comparison table of the various popular DC++ clients and others that use the Direct Connect protocol. You can see from the columns of features, how the clients differ from the original DC++ and other modded clients. If you would like your client added, send me a PM and I'll consider adding it. The table is a work in progress, suggestions are welcome. Windows Based Clients - Updated: 6/13/2005 DC++ Based Client Name DC++ ver / Client ver Rich Text Color Segment Downloading File Hashing Upload Lim/ Disc Slow Speed IP / Lock / PK / Supports Info Client type string generator Player Integration Share Checking $UserIP $User Command Other Features BCDC++ 0.674b X TTH U I / P DC++, BCDC++ Winamp, MPC, iTunes X X Lua Scripts CZDC++ 0.673 / 0.666[k] X TTH U / D I DC++ Winamp X X Emoticons DC@fe++ 0.401 RC1 TTH U DC@fe X X DC++ 0.674 TTH DC++ X X DC++ k 0.251-k U I DC++ X DC++k CDM, mirror 0.251 / 3.3 U I / L / P / S DC++ X X DC++p 0.401 / 2.01 TTH U DC++ Winamp, MPC X DCDM++ 0.401 / 0.041 TTH U I / L / P / S DC++ Winamp, MPC X X Customizable Client Detection. fulDC 0.674 / 6.64 X TTH DC++ X X File Skiplist iDC++ 0.404 / 1.26 X TTH I / L / P / S DC++ Winamp X X Badfile list, Emoticons Client Name DC++ ver / Client ver Rich Text Color Segment Downloading File Hashing Upload Lim/ Disc Slow Speed IP / Lock / PK / Supports Info Client type string generator Player Integration Share Checking $UserIP $User Command Other Features LDC++ 0.6685 / 1.00 RC1 X X TTH U / D I / L / P / S LDC++, DC++ Winamp, iTunes, MPC X X X Emoticons, Kademlia, Lua Scripts oDC 0.306 / 5.31 X TTH oDC++ X File Skiplist PhantomDC++ 0.306 / 1.19c U I / P DC++, PDC++ Winamp, MPC, Others X X Lua Scripts PosssumMod 0.306 / 0.0.12b U Possum, DC++ X Upload Queue rotation, Log rotation R2++ 0.4034 / 0.401[26] X TTH Opt I / L / P / S DC++ Winamp, MPC X X X Reverse Connect 0.674 / 0.674c X TTH DC++ X X Kademlia Sasser 0.667 / 0.019 X TTH U I / L / P / S DC++, Sasser Winmp, MPC X X X StrongDC++ 0.668 / 1.00 RC9 X X TTH U / D I / L / P / S StrongDC, CZDC, DC++ Winamp X X X Emoticons zDC 0.668 / 0.668[z1] X X TTH U / D I / P DC++, RevConnect X X X Lua Scripts .. Non-DC++ Based Client Name Latest Version Rich Text Color Segment Downloading File Hashing Upload Lim/ Disc Slow Speed IP / Lock / PK / Supports Info Client type string generator Player Integration Share Checking $UserIP $User Command Other Features Black D.C. 1.26 I X X X Lua scripts DC# 0.31 DC++ DC:Pro 0.2.3.149 X X TTH U I DC++, DC:PRO Winamp, MPC, Others X X Emoticons, Direct file send DelChi DelChi IntraDream DC 2.0 X DC++ JavaDC 0.20 JDC 0.02 KoalaDC 0.4 Neo-Modus Direct Connect 2.205 TTH pyDC 0.6 Valknut 0.3.7 X Opt SSL transfer / chat wxDC 0.930 .. 8. Is there a Linux version? Question: Answer: Table is a work in progress...suggestions welcome Linux Based - Updated: 11/11/2004 Client Name Segment Downloading $CHUNK Direct Download Upload Limiting XML Hublist Client type string generator Asami CCCP X Chiyo DCTC X X X X DC++ LDCC X QuickDC X RCCP DC++ linux project Valknut X X X X 9. Is there a Mac version? Question: Answer: Table is a work in progress, suggestions welcome! Mac Based - OSX Only Client Name $CHUNK Direct Download Neo-Modus Direct Connect DCGUI X X DCOSX Mac DC++ 10. Can I import my NMDC queue into DC++? Question: Answer: Depends on the DC++ version. Clients newer than 0.4032 cannot Clients older than 0.4032 can. Go to File -> Import NMDC queue and browse to your NMDC directory and select queue.config. DC++ Changelog Related Entries: 0.4032: Removed obsolete Import from NMDC queue (blame cologic) 0.163: Added NMDC queue importing (thanks luca rota) 11. How to share network drives Question: Answer: DC++ 0.404 or newer DC++ clients after 0.404 are able to successfully share network drives from within DC++ with out mapping them. Go to File -> Settings -> Sharing -> Add Folder Navigate through your home network to the computer with a share and select one. Now you should see it listed as a shared folder in DC++ DC++ 0.305 to 0.403 DC++ clients 0.305 to 0.403 support sharing networked drives via their UNC name (i.e. \\servername\share), but the GUI does not have the option to navigate through My Network Places entirely. This leaves two methods to sharing a network drive: Follow the method below in the next section for older DC++ clients Edit your DCPlusPlus.xml file and add the UNC path for a share. F:\My Music \\somecomputer\share DC++ 0.304 or older NeoModus Direct Connect nor DC++ will allow you to directly share a network drive. However, there is a solution to sharing them! Simply map a network drive to a drive letter in windows (i.e. Z:\share). Once the network drive has been mapped to an drive letter, you can share it in NMDC or DC++ like a normal folder. Open up Windows Explorer or My Computer. Go to Tools -> Map Network Drive. Type in the computer name and the share point (or browse to it). You might need to specify a different username when connecting to the computer. Click on "different user name" and enter in the name/password. Inside DC++ sharing setting, select the drive you just mapped (Z: in this example). That's it! 12. Why do I need active mode? Question: Answer: In passive mode, DC++ will only make outbound connections to other users. All searches will be sent through the hub, and search results will be returned through the hub as well. DC++ will return a maximum of 5 search hits for a passive user. Passive users cannot download from other passive users. Passive mode is an extra strain on hubs, so please do not use it unless you must. DC++ users in passive mode will have M:P in their DC++ tag. That being said, active mode on DC++ will make inbound and outbound connections to other users. All searches will be sent through the hub, and search results will be returned directly from active mode users and through the hub for the passive users. Active users can download from either active and passive users. Obviously that means you can connect to a larger group of people. 13. How to set up active mode with a hardware firewall/router? Question: Answer: Active mode requires both TCP and UDP access on the same port incoming and all ports outgoing for DC++ to work properly. You can simplify the process of setting up active mode if your router and operating system is UPnP compatible. Read this FAQ for more information. First you need to set up the router to forward the connections to the computer with DC++. This is could be called port mapping, port redirecting, port forwarding or something like that. Find out how to do this with your router/NAT in the user manual. You need to forward one port. Select a number between 1024 - 65535, they should mostly all be free. Make sure both UDP and TCP are being forwarded on the port you chose. The IP that you are forwarding to should be the internal IP address of your DC++ computer. It usually begins with "192.168", "172.16." or "10.x.". Go to the command prompt and type: ipconfig (Start Menu | Run | cmd /k ipconfig) When you have mapped a port on the router, open up DC++ and go to Settings. Select active mode. In the port field, enter the port number that you are forwarding on the router. In the IP field, you need to enter the external IP address of your router. This can easily be checked on here. It should now be working. If it is working for a while, but the next time you use DC++, you only get Connection Timeout’s or no results when searching, your IP (either external or internal) is likely to have changed. If you find the external IP is constantly changing (DSL users often experience this), you can set yourself up with a dynamic name (i.e. myname.kicks-ass.net). Such as Dynip or DynDns and put that name into the IP field. Make sure to use an update client, which will update the dynamic name service with your latest IP. For Linux based firewalls/routers, take a look at this FAQ on this subject. Here are several how-to guides with screen shots for various models. Don't hesitate to take a look how its done even if your exact model isn't list, most likely it will provide a useful guide and help setup yours. Alcatel SpeedTouch 510 D-Link DI-604 / DI-704 D-Link DI-804 D-Link (all other models) Linksys (many models) Netgear DG814, RP614, RP614v2, MR814, MR814v2, WGT624 Netgear RM356, RH340, RH348, RT388, RT311, RT314 Netgear (all other models) ZyXEL Prestige 310 / 314 All other models not listed here What about Zone Alarm? Older versions of Zone Alarm had issues with DC++, which caused corrupted downloads/uploads. This results in the 'Rollback Consistency' error message. Other problems users frequently have is ZA blocking DC++ even though it is fully allowed. In this case, you need to completely uninstall it as disabling it will not help, and then get another firewall. Windows XP? Service Pack 1: Its strongly recommended that you do not use the SP1 firewall and instead use a third party one. Make sure to disable the XP firewall if you do choose this option. If you really must use it, then checkout this guide on how to set it up. Remember you need both TCP & UDP. Service Pack 2: The firewall in SP2 is a lot more robust than its original incarnation. While it does not offer a plethora of options, its suitable to use by itself for protection. Its wise to enable logging of packets that the firewall drops for troubleshooting applications. To do this, go to Control Panels -> Windows Firewall -> Advanced Tab -> Security Logging -> Settings. Enable Log Dropped Packets. The log file is located at C:\WINDOWS\pfirewall.log. DC++ Changelog Related Entries: 0.4033: Added UPnP support (thanks mark gillespie) 0.305: Added support for $UserIP, %[ip] as user command parameter and server side IP detection (automatically used if the IP field in settings is blank) 0.242: Fixed problems with changing active port 0.21: Fixed port changing bug (DC++ would still listen to the old port until restarted) 0.20: A random free port between 1025 and 32000 is now used in active mode, unless a port specifically has been set. 0.16: Changed default port to 1412, should improve compatibility with a lot of firewalls 0.03: New settings, including passive mode and active port selection 14. How do I set up active mode with a Linux based firewall/router? Question: Answer: How do I set up active mode with a Linux based firewall/router? It depends on what kernel version you are using. With 2.4 you can choose between doing postrouting or the easier prerouting. The difference is if you do a postrouting, all clients withing your internal network (LAN) can connect and download/upload between eachother. Postrouting is not nessesary if you are the only client wich uses DC behind the router/firewall. Examples below uses the following settings: External ethernet card: eth1, external IP 213.112.8.55, firewall (router) IP: 192.168.0.1, client IP: 192.168.0.2, external and internal port: 555 Linux 2.4, postrouting example iptables -t nat -A POSTROUTING -d 192.168.0.2 -s 192.168.0.0/24 -p tcp --dport 555 -j SNAT --to 192.168.10.1 iptables -t nat -A POSTROUTING -d 192.168.0.2 -s 192.168.0.0/24 -p udp --dport 555 -j SNAT --to 192.168.10.1 iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 555 -j DNAT --to 192.168.10.2:555 iptables -t nat -A PREROUTING -i eth1 -p udp --dport 555 -j DNAT --to 192.168.10.2:555 iptables -t nat -A PREROUTING -d 213.112.8.55 -p tcp --dport 555 -j DNAT --to 192.168.10.2:555 iptables -t nat -A PREROUTING -d 213.112.8.55 -p udp --dport 555 -j DNAT --to 192.168.10.2:555 Linux 2.4, prerouting example iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 555 -j DNAT --to 192.168.0.2:555 iptables -t nat -A PREROUTING -i eth1 -p udp --dport 555 -j DNAT --to 192.168.0.2:555 Linux 2.2, example ipmasqadm portfw -a -P tcp -L 213.112.8.55 555 -R 192.168.0.2 555 ipmasqadm portfw -a -P udp -L 213.112.8.55 555 -R 192.168.0.2 555 Submitted by tajisen How to use Shorewall to configure your iptables Here's what you have to add to rules (assuming loc is the zone where your computer is located, 192.168.0.7 is your computer's IP, 666 is the port you wish to use and 123.45.67.89 is your external IP): #ACTION SOURCE DEST PROTO DEST PORT SOURCE PORT(S) ORIGINAL DEST DNAT net loc:192.168.0.7 tcp 666 - 123.45.67.89 DNAT net loc:192.168.0.7 udp 666 - 123.45.67.89 Submitted by Ender 15. How to setup active mode on FreeBSD Question: Answer: How to setup active mode on FreeBSD (using ipfw/natd firewall) Edit your ipfw rules list (usually something like /etc/rc.ipfw) . In there somewhere, you should have a rule that diverts all traffic to natd, which should look something like: ${fwcmd} add divert natd all from any to any via ${natd_interface} Below this, add as your next rule: # Direct Connect Active Mode Port Forwarding ${fwcmd} add pass all from any to any 1776 via ${oif} ${fwcmd} add pass all from any to any 1776 via ${iif} For "1776" replace any port (preferably something above 1000) that you would like as your forwarded port. Save and close /etc/rc.ipfw. Next open up your /etc/natd.conf file. Make sure the top line has your interface listed (replace "de0" with whatever your outside interface is): interface de0 Then add at the end the following two lines: redirect_port tcp 192.168.70.2:1776 1776 redirect_port udp 192.168.70.2:1776 1776 For 192.168.70.2, substitute the internal IP of your machine running DC++. For "1776" substitute whichever port you used above in your /etc/rc.ipfw file. Finally, we need to reset ipfw and also natd. Type: ps aux | grep natd Find the process # for natd. Now we need to kill the process and restart it: Type: kill -9 && natd -f /etc/natd.conf Last step, time to reset ipfw to make sure our traffic gets through: /sbin/ipfw -f flush /bin/sh /etc/rc.ipfw Submitted by SeeKay303 16. How can I configure DC++ to use UPnP ? Question: How can I configure DC++ to use UPnP ? Answer: Universal Plug and Play (UPnP) is only currently supported on the Windows XP platform. In addition, you also need UPnP capable hardware (typically a broadband router using NAT traversal). If you meet both of these requirements, setting up DC++ is normally a simple process. UPnP support is only in DC++ 0.4033 and later. To enable UPnP on DC++, open the Settings panel, select Advanced, scroll down to the bottom, enable "Use UPnP Control". Restart DC++. If your UPnP system is setup correctly, DC++ will now automatically create the required port mappings for DC++ to operate in Active Mode. It will also detect your external IP address, and switch into Active Mode. If UPnP works successfully or unsuccessfully, fill out this form so other users can know which set ups work. Troubleshooting: If you are having trouble getting this all to work (or see messages in the DC++ log like "Failed To Create Port Mappings"), and you are sure you meet the minimum requirements mentioned above, download the UPnP diagnostic tool. You can get it here. This tool will tell you what network interfaces on your computer support UPnP. If none of your network interfaces are reporting UPnP capabilities, try the following suggestions: Ensure your UPnP hardware has the UPnP service switched on (some routers default to off), consult your manufacturers documentation. Ensure Windows UPnP services (Control Panels -> Admin Tools -> Services) are running. "Universal Plug and Play Device Host" and "SSDP Discovery Service". Both of these XP services should be set to "Automatic" startup and "Started" status: Switch on the UPnP User Interface. To do this: Open "My Network Places", and in the Network Tasks Panel, select Show icons for networked UPnP devices. If UPnP is working, you should see your routers name in My Network Places: Also, when you go to: Start | Settings | Network Connections, you should see Internet Connection listed under the Internet Gateway category. Reboot both your PC and your UPnP device (router). If you do not see your router as a network device in "My Network Places" after several minutes, UPnPTest will fail to create an UPnP mapping to the router, resulting in something looking like: INFO: Adapter #0 - 192.168.8.17 - UPnP Disabled. Make sure the windows firewall or your third party firewall is not blocking UPnP packets. Windows XP Firewall: Go to Control Panels -> Windows Firewall -> Advanced Tab -> Security Logging -> Settings. Enable Log Dropped Packets. The log file is located at C:\WINDOWS\pfirewall.log If you see any packets being dropped with the port 1900 or 2869, the the firewall is misconfigured and is preventing UPnP from working. Third Party Firewall: Checking this setting varies widely between firewalls. Most decent firewalls have some sort of logging function, where one can see what the firewall is blocking. Look for "UPnP" or ports 1900 and 2869. At the time of this writing, I know Norton Internet Security 2005, blocks UPnP and does not log it. Read its FAQ on how to unblock. If the diagnostic tool is now still not reporting any UPnP devices, you should start considering more drastic actions like upgrading your router firmware, as many routers have UPnP implementation bugs. If you have done all of the troubleshooting tips above, and are still having UPnP problems, give send me a email, I will try to help. mark.gillespie@gmail.com VERY IMPORTANT NOTE: I will ignore ALL support requests from people who have not tried the above troubleshooting tips and do not provide at minimum the following information: What steps you have already done Your UPnP device model number and firmware version. Your operating system and service pack level. What firewall you are using (if any). Without this information, please do not expect a reply... I sorry I have to be so strict, but some of the emails I have received need to be seen to be believed!, and the crystal ball is currently out of action.. Submitted by mgillespie DC++ Change Log Related Entries: 0.669: Hopefully fixed an UPnP crash 0.666: Fixed a crash in the upnp code 0.4033: Added UPnP support (thanks mark gillespie) 17. How do I log on as a register user/op? Question: Answer: There are two ways. One is to set your default nick (Settings -> General) to the nick you have at the hub in question and then connect. You will be prompted for your password every time. Second way is to add the hub to your favorites. You can then choose to log in automatically by specifying a nick / password combination for that hub (note; you have to connect from the favorites, when connecting from the public hub list, DC++ will always use the default nick and prompt you for a password) 18. Any websites to help me set DC++ up? Question: Answer: Broadbandreports.com DC++ FAQ This is written by BSOD and is partially a mirror of this site. It covers more information on software/hardware firewall setups and hub software. DC++ Guide The following is a great guide with plenty of pictures on how to do basic setup of DC++, written by TheParanoidOne on the DC++ forum. indx.f2s.com Another guide on the basics of setting up DC++ DCNet.be. A guide written in Dutch 19. Alternative hublists? Question: Answer: One of the benefits of using DC++ is the ability to switch the hub list that is downloaded. To start out, Hublist.org is a great site with a large list of hub lists. DC++ will only use one hub list at a time, but you can specify several in case one list goes down. DC++ After 0.4033: To use another hub list, open up File -> Settings -> Downloads. Click on Configure Public Hub Lists. Paste in another hub list and click Add. DC++ will try each hub list listed, starting with the one at the top. DC++ Before 0.4033: To use another hub list, open up File -> Settings ->.Downloads. Replace the "Public hub list URL" at the bottom. Place a semicolon between each hub list. Here is a list of hub lists in use today: Public XML Hub lists For DC++ clients newer than 0.4033. http://www.hublist.org/PublicHubList.xml.bz2 Has additional columns of information http://dc.selwerd.nl/hublist.xml.bz2 Public Hub lists http://www.hublist.org/PublicHubList.config.bz2 Uses www.hublist.org database http://dc.selwerd.nl/hublist.bz2 Sedulus's Hublist http://dreamland.gotdns.org/PublicHubList.config.bz2 Dreamland's Primary Hublist http://www.neo-modus.com/PublicHubList.config Neo-Modus's original hublist http://www.p2pitalia.com/dclist/Publichublist.config.bz2 http://www.indx.f2s.com/hublist.config http://www.freeweb.hu/pankeey/dc-hubz/pankeey-dchubz.config.bz2 http://dcinfo.sytes.net/publichublist.config.bz2 Country Specific Hub lists http://www.galy.szm.sk/CZHubListON.config Czech hubs http://www.dcnet.be/publichublist.config.bz2 Dutch hubs http://dcinfo.sytes.net/hungaryhublist.config.bz2 Hungarian hubs http://nevienc.sytes.net/dcpp.config Latvian hubs http://www.butcher.times.lv/hublist.txt Latvian hubs http://www.zpoc.com/rooms.config Christian hubs If none of these work in DC++, try pasting a link into your browser. If a file does download, then you have some sort of firewall blocking DC++ specifically. If nothing downloads, then a firewall is blocking all your internet traffic to that site or the list is down. DC++ Changelog Related Entries: 0.688: [bug 345] Fixed an xml listing parsing bug 0.667: Improved multiple hublist support (thanks garg) 0.4033: Added (initial) support for hublist.org xml hublists 0.402: Copy address to clipboard from public hub list (thanks joakim tosteberg) 0.305: Really fixed hublist space trimming =). Added accelerator for filtering in public hubs (thanks gargoyle) 0.304: Fixed trimming of spaces for http downloads (hub list...) 0.26: Default hub list now points to one that works 0.25: Fixed public hub list mouse clicks and reopening (thanks todd) 0.241: Fixed error reporting for hublist download 0.233: Fixed another thing with hub lists being unnecessarily downloaded (thanks todd pederzani) 0.23: Hublist is no longer loaded in the background by default when starting the application. Fixed some proxy connection problems for the hublist (thanks Ondrea (or is it Ondra or Ondrej? =)). Disabled automatic opening of the hublist. 0.181: Fixed a bug with bad hublist server names (empty ones, not starting with http://...) 0.174: Fixed some minor hublist bugs 0.172: Added support for bzip2-compressed hub list downloading 0.17: Removed the public hublist multi-select feature 0.163: Added public hublist filter. Changed error messages in public hubs frame. Added proxy support for downloading the hub list. Fixed a crash when loading invalid hub lists 0.12: Added right-button menu to Public Hubs 0.11: Public hubs automatically appears on startup 0.03: Hub list sorting. 0.01: List hubs, connect to them and chat 20. My university blocks DC++, anything I can do about it? Question: Answer: Unfortunately, probably not. The majority of schools have moved over to a solution from Packeteer or a similar company. This software/hardware solution has the ability to look into a TCP packet, decode the application layer data and then throttle/block accordingly. There could be a way to get around this, but it's no easy task. It would involve setting up a host off campus which is not influenced by the schools packet shaping. Then setting up a tunnel (socks, proxy, ssh, vpn, etc) and routing all your DC++ traffic through it. It will still be affected by the schools packet shaping, but there is a chance the tunnel you created has a higher priority/larger pipe than the P2P one. Some schools might have their network behind a NAT, in which case you are SOL for an active connection. Furthermore, if this is the case then they have full control over connections and there isn’t anything you can do. Try passive mode and cross your fingers. A few schools just use simple port blocking. DC++ automatically uses a wide range of ports for outgoing traffic to help bypass port blocking. If the school is smart enough to block port 411 outgoing connections, then you are pretty SOL since that is the port most hubs use. One could try to connect to a hub that uses an alternative port (i.e. myhub.kicks-ass.net:2385). Once again, you could possibly set up a tunnel or port mapping, but those are complicated solutions that not many can achieve (and out of the scope of this FAQ). A solution which might work is to use a proxy program/service to bypass their firewall, such as HTTP-tunnel or Hopster. Using DC++ 21. What do the different icons mean? Question: Answer: In general the following is true: Bricks: Passive mode user (note, this does not mean people without bricks are active, just that the one with bricks is passive for sure. This is detected when that user searches or tries to connect to you) Blue: DC++ user (again, not blue does not mean not DC++, this is detected when the user tries to connect to you or when you try to connect to him) Specific examples: : Unknown user : Unknown OP : Active mode DC++ type user : Active mode DC++ type OP : Unknown passive mode user : Unknown passive mode OP : Passive mode DC++ type user : Passive mode DC++ type OP Read this FAQ for the difference between a passive and active mode user. 22. How can I configure DC++ to use it with proxy? Question: Answer: Currently, proxy connections are only supported in DC++ for downloading the public hub lists. To use a HTTP proxy for this, enter the full proxy address (http://my.proxy.com:8080) in the settings, under "HTTP Proxy". In other words, connecting to a hub through a proxy is not supported. Using a proxy to tunnel all DC++ traffic through it beyond the scope of this FAQ. While using a proxy can be helpful to help mask your real IP, it can also be abused for the very same reason, which is why it will not be covered. 23. What are all the / commands for DC++? Question: Answer: All of these may be type in the main chat or in a private message window./grant grants a slot to the user of the private chat window you type in /getlist Command to get users list from private chat /close close current window /help short help message /refresh Refreshes list of shared files /away Specifies a message to auto-respond in PM's while you're AFK (there's a default message so you don't need to specify one) /back Turn away message off /slots <#> Changes number of slots to <#> /clear Clears the main chat windows /ts Switches timestamps in chat windows on and off /showjoins Toggles joins/parts messages for the current hub /search Searches for /join Joins specified hub /pm Opens a private message window to the user /g Search Google /imdb Search IMDB /fav Adds current hub to your favorites /dc++ Gives a comment about DC++ and shows the URL where you can get it 24. Why don't I get any search results? Question: Why don't I get any search results? Answer: Assuming that you can connect to a hub and chat with users, this is usually caused by a firewall, router or connection sharing. There are several things you can try: Enter your external IP in the settings dialog and try again. Find out the IP from here. Check your firewall configuration. You need to make sure it's allowing or forwarding incoming connections on the port specified in the settings. You have to enable both TCP and UDP traffic. If you can download files but not search in active mode, this means that UDP packets are still blocked. Read the FAQ on how to set up active mode. Your school/work might be blocking DC traffic. Read the FAQ on what you might be able to do about it. If the above things don't work for you, you'll have to use passive mode (if the hub allows it). If you're using DC++ 0.4034 or 0.666, there is a bug that prevents passive mode users with international characters from being able to search. Upgrade to 0.667 or later. 25. How do I resume my downloads in DC++? Question: Answer: DC++ will by default, automatically search for alternative sources for files in your download queue. If it does not, make sure the option is enabled (File | Settings | Advanced | Automatically search for alternative download locations). At the time of this writing, it searches based on the existing filename and the file size. Any matches that are the exact same size are added as alternative sources. The file(s) will now resume downloading. In the near future, DC++ will search for files based solely on its TTH value. You can manually add files into the download queue by similar methods. Search for a file (its best to also specify a minimum file size to reduce the number of unneeded results). If the file is exactly the same size as the one in your download queue, you can right-click on it and select Download to.. The existing file should be in the submenu. If not, then its not the same size or TTH value. If the file refused to resume, then you likely have a Rollback Inconsistency. 26. How do you resume or overwrite in DC++ from a different user? Question: Answer: In DC++ you have the option to resume or overwrite a file from a different user to download a file. When choosing the file you want to download, you have the option of downloading it to a different name using "Download to...". This allows you to choose whether to resume to an existing file or choose another target file and start over... 27. Whats the meaning of the status bar at the bottom ? Question: Whats the meaning of the status bar at the bottom ? Answer: Using the following example: H: 0/1/8 Number of hubs you're connected to. 0 unregistered hubs / 1 registered hub / 8 hubs OP'ing Slots: 0/2 Slots open. 0 slots free / 2 slots total D: 1.13 GB Data downloaded in current client session U: 865.06 MB Data uploaded in current client session D Lim: 0 B/s Download speed limit. 0 Bytes a second U Lim: 11.00 kB/s Upload speed limit.11 Kilobytes a second (only present in DC++ mods) D: 1.31 kB/s (0) Current download speed. 1.31 Kilobytes a second. ( Number of current downloads: 0 ) U: 13.40 kB/s (2) Current upload speed. ( Number of current uploads: 2 ) 28. Some hubs block me from using DC++. How do I prevent them from doing this? Question: Answer: There are two real solutions here, 1. Convince those hub owners that DC++ is a good thing, which in many cases can be hard because quite a few of them are just plain stupid and won't listen no matter what (even if you're only connected to their one hub and play by the same rules as nmdc users...) 2. Don't go into those hubs! There are plenty of good hubs that don't care or even support usage of ++ 3. Modify the client, but that's not a good long-term option because it often leads to banning 29. The meaning of the ++ tag Question: Answer: This table is based off the latest client versions at the time of writing Client Tag Description Information DC++ <++ V:x,M:x,H:x/y/z,S:x,O:x> V: Client version M: Mode, A = Active, P = Passive, 5 = Socks5 H: x = number of hubs connected to where you're not a registered user y = number of hubs you're registered in z = number of hubs you're registered as op S: Number of slots open O: If the current total upload speed of a user is lower than the number after O:, DC++ will automatically open another slot. BCDC++ <++ V:x,M:x,H:x/y/z,S:x,O:x,B:x> B: Upload bandwidth limit in kb/s (optional and only shown when using BCDC mode) CZDC++ <++ V:x,M:x,H:x/y/z,S:x,O:x,L:x> L: Upload bandwidth limit (optional and not always shown) DC:Pro F: Bandwidth limiting (optional and only shown in the description when using DC++ mode) x = Download limit y = Upload limit DC++k CDM <++ V:x,M:x,H:x/y/z,S:x,O:x> V:y CDM version DCDM++ <++ V:x,M:x,H:x/y/z,S:x,O:x,B:x> B: Upload bandwidth limit in kb/s DCGUI H: The number of hubs the client is connected to. L: Upload bandwidth limit iDC++ <++ V:x,M:x,H:x/y/z,S:x,O:x> V:y iDC++ version MS++V <++ V:x,M:x,H:x/y/z,S:x,O:x,B:x> B: Upload bandwidth limit in kb/s (optional and only shown when using MS++V mode and in > 3 hubs) NMDC v2 O: has a different meaning then in a DC++ Tag. O: Number of open slots. oDC 5.3 and greater change the Client Name and Version fields PhantomDC <++ V:x,M:x,H:x/y/z,S:x,O:x,B:x> <.P> B: Upload bandwidth limit in kb/s (optional and only shown when in PhantomDC mode) rmDC++ B: Upload bandwidth limit in kb/s [rmDC++ mode] D: Download bandwidth limit in kb/s [rmDC++ mode] Client can emulate DC++, RMDC, zDC, CZDC, BCDC, oDC, Phantom StrongDC++ <++ V:x,M:x,H:x/y/z,S:x,O:x,L:x> V:y StrongDC++ version [StrongDC++ mode] L: Upload bandwidth limit (optional and only shown when in CZDC / StrongDC mode) [CZDC mode] zDC++ <++ V:x,M:x,H:x/y/z,S:x,O:x> zDC++[V:x] V:y zDC++ version Layout idea by HaArD 30. What to do if I've been banned? Question: Answer: There are two types of bans, temporary and permanent. Temporary bans last for 10 minutes (usually) and can occur for various reasons ranging from an unsuccessful connection attempt (connection was broken while sending a command for instance) to you being kicked from the hub (most likely to happen). Permanent bans are entered manually or scripted and they last until the permanent ban list is cleared or somebody removes you on the hub. It means that your Nickname / IP is not allowed to connect to that hub any more, neither with DC++ or NMDC. Most hubs have reasonable owners and OP’s that ban for logical reasons such as fake sharing, sharing illegal or unethical things (child pornography or nazi propagand spring to mind). There are also those that will ban you for less reasonable reasons, such as you're choice of client or because the OP has a sore tooth...if you run into the second type, the best thing you can do is to avoid it in the future, who cares about them anyway? If you've been banned for reasons of the first category, you've only got yourself to blame... You can either: Fix what was wrong and wait for the ban to expire, if it is a temporary ban. Contact one of the hub ops outside of the hub. You may find contact details in the hub's welcome message or website if they have one. Hublist.org is useful tool for finding users in other hubs. Googleing for the OPs name might also turn up a contact method. Get someone else to go into the hub for you to plead your case. Move on to another hub. There are plenty out there. 31. Connection refused by target machine Question: Answer: This usually means that there is no hub running on the machine you're trying to connect to. If you got the address from a hub list, try again later as it might have temporarily been taken down (or it's under heavy load and can't handle your connection at the moment). This message can also occur when a firewall is blocking DC++. If you are running a software firewall, delete the rule for DC++ and have it recreate it. If that does not work, uninstall the firewall and try again (in many cases, simply disabling the firewall will not work). If you are still unable to connect to any hub in the public list, then your only option is to try the suggestions in this FAQ. 32. Connection Timeout Question: Answer: This is most often caused by a firewall blocking DC++. Things you want to check: XP Firewall, Software firewall (Kerio, Norton Personal Firewall, Zone Alarm, Sygate, etc), or a router/NAT (this includes those connecting from a University or workplace). To resolve this issue, there are several things one must check: Disable the XP firewall. Follow the first part of this guide to where its locataed. Setup rules in your software firewall to allow DC++ traffic through. Many guides can be found here. Enable port forwarding on your router. Follow this FAQ on how to fix it. Connect to hubs on non-standard ports, which can be found by looking through the public hub lists for those which have port numbers appended (i.e. myhub.kicks-ass.net:9821) If you're connecting from a University or workplace, then read this FAQ. Often there is nothing you can do to make DC++ work. Change to passive mode. 33. What does search spy do? Question: Answer: The search spy shows the most popular things that people search for and some other statistics. The first column is the word they've searched for (what they typed into the search window). The second column is number of times this word has been searched for against your DC++ client. The statistics are reset every time you close the spy window. The status bar at the bottom also shows the total number of searches while the spy was open and the average number of searches per second. DC++ Change Log Related Entries: 0.4034: Added last search time to search spy (thanks ullner) 0.177: Added a search hit counter to the search spy 0.173: Added some stuff to the search spy (useless features are the best...=) 0.163: Added search spy window with counter 34. How do I use the public hublist filter? Question: Answer: Type in something you're interested in and press enter. The hub list will then be filtered so that only hubs containing the string you've entered will be shown. Example: Type anime and press enter and you will only see hubs that have the word anime in their name, description or address To restore the full list, clear the edit box and press enter. Here is a list of Alternative hublists one can use. 35. How are automatic searches matched? Question: Answer: For this feature to work, you'll need to have it enabled. File -> Settings -> Advanced -> Automatically search for alternative download locations. Basically, the same algorithm as "search for alternates" is used. All non-alphanumeric characters from the filename are removed (.-_ and so on), and the search is sent. Then, any result returned that has exactly the same size is added as a source. All in all, it's not an exact filename match but the filename still plays a central role (otherwise, for instance, rar sets would be added to the wrong rars). Since DC++ 0.402, if a file has a TTH root, autosearching will use the root hash instead of the file name for its search. DC++ Change Log Related Entries: 0.4033: Removed autosearch string, it's not used any more, Fixed a bug with autosearch repeating the same search needlessly (this should result in fewer autosearches, good for the hubs) 0.4032: Fixed issue with autosearch not getting filelists, Fixed an issue with autosearch by tth not being done 0.402: Automatic search matching is now done exclusively by TTH for those items that have a TTH root and by exact filename for those that don't., Matching by name removed for queue items with a TTH root (for autosearches), Autosearch is done by TTH for queue items that have a root, Fixed a rare deadlock when autosearching 0.307: Added option to match autosearch filenames exactly to further avoid the wrong file being downloaded (default on) 0.306: Changed autosearch so that it only searches if less than 5 sources are online, this should stop galloping filelist downloads as well 0.305: Added option to automatically download filelist and match it on autosearch match. This will dramatically speed up autosearching, lessening the strain on the hubs as less searches have to be done. 0.304: Fixed a bug in autosearch when using auto search strings (thanks ilkka sepp?l?) 0.302: Updates to the autosearch feature 0.26: Search for alternates now sets file type as well (and should work correctly with sizes...) 0.24: Doubled interval between autosearches (2 minutes now, and 60 between each research of the same file), this to ease the bandwidth load on busy hubs 0.23: Automatic search now searches with type if possible (to ease the load on clients) 0.18: More changes to the autosearch, it should now be more random and therefore yield better results, Removed sources are no longed automatically readded by the autosearch feature 0.177: Made autosearch more effective (much less hub bandwidth usage...) 0.173: Improved the autosearch algorithm a little bit, Fixed search for alternates bug 36. How do I protect myself from search spam in DC++? Question: Answer: By doing nothing! DC++ automatically does basic search spam protection for you. Keep in mind, that sometimes, when DC++ detects a search spam, it might be because the hub is overloaded and sends searches in big lumps, making the flood trigger react as too many searches arrive at once. If more than 5 searches are received from the same user within 7 seconds, DC++ will send out this warning. Also, if a thread in DC++ hangs and consumes full CPU usage (like opening a really large filelist), it might also trigger the search spam notice. DC++ Change Log Related Entries: 0.174: Search spammers are now ignored for 2 full minutes before they're given responses again. 37. ‘No users to download from’ - I just added one! Question: Answer: When I search for a thing, its comes up that there are people with slots free, I try to download and then it says "No users to download from" Despite the fact that I have searched the second before (and searched again afterwards and they are still there), they have slots free and I can't download. So what is the problem? Look in the errors column in the queue for more information. The file might be missing or corrupt for instance. Most often it is cause from a Rollback Inconsistency. 38. What is a Rollback Inconsistency? Question: Answer: This message means that somehow the data has become corrupted during a transfer. Usually its because one of the users, either you or the one you are downloading from, is using a bad firewall such as ZoneAlarm which is intercepting some packets. There are three things you can try to fix the problem: You can attempt to fix the file by chopping off the rollback bytes, using a tool like cutoff. Delete the file and redownload it Completely disable the rollback feature by changing the value in Settings -> Advanced to 0. You can do this, but at your own risk. The rollback is a scheme to ensure that the file you're resuming and the file you're downloading from a remote source are the same. If you disable it after getting the rollback inconsistency message, there will be corruption. 39. What is a TTH Inconsistency? Question: What is a TTH Inconsistency? Answer: This message means that the file you have attempted to download contains a different TTH hash than the one in your download queue. There are two things you can do to fix this: Search for the file by its TTH value to find another source for it. Delete the file from your Download Queue and off the hard drive. Then re-add the file from the search window or userlist. 40. What is the anti-fragmentation feature? Question: Answer: When downloading, it creates a file of the expected target size with unspecified content. If the download fails, the file is truncated to the size DC++ thinks it has downloaded, and resume should work fine. If DC++ crashes, you'll lose the whole downloaded part + any resumed part as well, as there's no way to know how much valid data there is in the file. Fragmentation occurs when several downloads are running at the same time, and small bits of data are written to different files continously - causing the data to be scattered around on different locations on the drive. Anti-fragmentation will reserve space on the harddrive, thus putting all the file's data in the same physical space on the harddrive. Fragmented harddrives become slow, as the drive needs to jump around to collect the file's data. Run windows' defrag software to "fix" fragmented data. 41. How does auto-grant slots feature work? Question: Answer: There are 3 extra slots (apart from those you specified in settings) that will be used to upload files under 16kB and for uploading your filelist, no matter the size. Operators in the hub can download mini-files and filelists even if those 3 extra slots are full. This is the reason that you can download some people's filelists, but when you try to download a different (larger) file, you will get the "No slots available" message. Note This function does not exist in the regular DC client - which means you cannot get small files or the filelist from those users if you don't have a slot. 42. What's "All download slots taken" and "No slots available"? Question: Answer: No slots available The user that you are downloading from is already uploading enough, you will need to wait until some of his uploads are finished. How long? There's really no way of knowing. All download slots taken You have set a limit in your settings, how many downloads you want to have running at the same time. This setting is found under the download tab in your DC++ settings. 43. What does the light & dark color in the progress bar mean? Question: Answer: 44. Slow downloads speeds! Question: Answer: If you experience slow downloads, it could be for many reasons: You need to optimize your operating system for your current connection speed. First close all Peer to Peer (P2P) applications. Next run the TweakTest on this site. Once you have optimized it, then run a Speed Test (best idea to select the site closest to your location). This will give you a good idea what your maximum download and upload speeds are. If you're getting within 10% of your connection speed, that's the best you can get! If you are having trouble with your broadband connection, and it relates to packet loss, excessive latency, or internet or ISP congestion, running the Line Quality Test may help find the cause (requires logon, free signup). The persons upload bandwidth who you are downloading from is maxed out. Don't pay attention to the speed listed in the connection type column, its completely subjective and often is not a true reflection on the persons connection type since they can set it. Find a person with fewer slots used, which should result in faster speeds. The person who you are downloading from is using a bandwidth limiter. There are two types: client based and third-party program. * Often the client based types have set download/upload speed ratios in place so its not completely unfair. (e.x. If the upload speed limit is set below 6 kB/s, then the client will restrict the client download speed to a 2:1 ratio). This varies from client to client and obviously not all support upload limiting. This type of speed limiting only restricts the uploading of files. It does not limit getting the user lists or searches. * A common third-party program that people use for limiting speed is NetLimiter. This type of speed limiting is absolute; meaning it can/does limit the speed which you get/send filelists, userlists and searches. One can suspect a person is using a tool such as NetLimiter when you're downloads are under 1kB/s. You are sharing the internet connection with others on your LAN and they are using up all the available bandwidth. Tell them to knock it off =) QoS Packet Scheduler Bandwidth Limiting might be enabled on the operating system. Follow this guide on how to disable it on XP/Win2K3. Windows 9x/ME/2K does not natively come with QoS. QoS can also be enabled on your router (not by default though). Look through the manual on how to check if its enabled. Your ISP may be limiting your P2P traffic via some method of packet shaping. This is very common at Universities and at the workplace. Call up the ISP and inquire if they do anything with P2P traffic. If the ISP does throttle you, then there is nothing that can be done to increase the speeds. With asymmetrical connections (incoming data capacity is greater than outgoing, i.e. DSL, Cable, Satellite), uploading near your maximum will affect your downloading speed. For this, you can use the "Use small send buffer" under File -> Settings -> Advanced. If the "Use small send buffer" still does not improve your download speed when you are uploading at the same time, then get a client with an upload limiter Check the list of client features for those which have one. Set the upload limit to 85% of your upload speed. (ex. you have a 256kbps upload. 256kbps / 8 bytes = 32 kB/s. 32kB/s * 0.85 = 27.2kB/s. Set the upload limit to 27 kB/s). 45. What is TTH (Tiger Tree Hashing)? Question: Answer: TTH Information Tips to Speedup Hashing Troubleshooting Tiger Tree Hashing (TTH) is used to verify the integrity of large chunks of data. The data is split into small pieces which are individually hashed, then hashed together until one, root hash is formed. A TTH looks something like: 4NIABZVGR4HOTNRPOMH2IRIJQSJYKFHEEIQUJWY. Detailed information can be found here. DC++ 0.400 introduced mandatory TTH. Once DC++ hashes all of your share (yes this will take a while) it will only hash new files. The hashing thread in DC++ is set to low priority, so it shouldn't interfere too badly. There are several benefits of file hashing: No longer does one need to pay attention to the name of the file when looking for alternative sources. If the files are the same, they will have the same hash and thusly be chosen as an alternative source. Just because two files are the exact same size does not mean they are the same bitwise! Magnet Links. Implemented in DC++ 0.4032. More information in this FAQ. Segmented (aka multisource) downloading. While it is currently not implemented, now there is a safe way to implement downloading files from multiple sources. All clients at this point have been implementing segmented downloading in cowboy fashion. They do not verify the files are the same (except for the size and partial name) which does result in corrupt files. A file hash ensures the files are identical. Tips to Speed up Hashing: Use an 80 pin IDE cable. Make sure your hard drive (HDD) has a 80 pin cable so it can use Ultra Direct Memory Access (UDMA) 66/100 speeds. A 40 pin IDE cables will restrict the HDD to a max speed of UDMA33. Any computer purchased in the last ~4 years should have an 80 pin cable. Below is what a 80 pin IDE cable looks like. This is a comparison of a 80 pin cable vs a 40 pin cable. Enable UDMA 66/100 in Windows. Windows 95/98/ME: From the Control Panel, open "System", then click the "Device Manager" tab. Open the icon for "Disk drives", and then highlight the drive you are interested in. Click "Properties" and then the "Settings" tab. Among the other settings you should find a "DMA" check box, which should be checked. If it is not, try checking it to enable DMA support. If you then reboot and the check box does not stay checked, this probably means your system does not support Ultra DMA and most likely is in PIO mode. Windows 2000/XP/2003: Go to the Control Panels -> System -> Hardware Tab -> Device Manager. Get properties on each IDE channel and change the transfer mode to DMA if available. You will need to restart for the change to take place. After the computer has restarted, go back and check what the Current Transfer Mode is. Below is a table of theoretical speeds that correspond with the different drive speed settings. Windows will automatically set the mode to the highest possible.Ultra DMA Mode Maximum Transfer Rate (MB/s) Defining Standard PIO Mode Maximum Transfer Rate (MB/s) Defining Standard Multiword 1 13.3 ATA-2 Mode 0 3.3 ATA Multiword 2 16.7 ATA-2 Mode 1 5.2 ATA Mode 0 16.7 ATA1 / ATAPI-1 Mode 2 8.3 ATA Mode 1 25 ATA2 / ATAPI-2 Mode 3 11.1 ATA-2 Mode 2 33.3 ATA3 / ATAPI-3 Mode 4 16.7 ATA-2 Mode 3 44.4 ATA4 / ATAPI-4 Mode 4 66.7 ATA5 / ATAPI-5 Mode 5 100 ATA6 / ATAPI-6 Mode 6 133 ATA7 / ATAPI-7 If your HDD is in a PIO mode, then the act of simply reading the HDD is CPU intensive and will severely hinder your hashing speeds in DC++! By now, most users should have their HDD(s) in an UDMA mode. If yours refuses to do so, then one must check the HDD controller in the BIOS of the motherboard; consult the manual on how to check that UDMA is enabled. Another location an user rarely might need to check is the internal HDD settings. This can only be accessed by a special program obtained from the manufacturer of your HDD; consult their documentation on how to check this. One can use a free program like HD Tach to benchmark the HDD(s) and compare it against dozens of others. If you have high CPU usage or a low average speed in your test result, you will experience slow hashing in DC++. Upgrade Drivers Another source of speed problems is old IDE / chipset drivers. Go to the website of your motherboards manufacturer and download the latest chipset and/or IDE drivers. If you have an OEM computer (Dell, Compaq, HP, Sony, Gateway, etc) then go to their website to look for the appropriate driver update. If you own a custom computer with a mainstream motherboard (Asus, Abit, MSI, Gigabyte, etc) then check their website for the appropriate driver update. If you own a custom computer, then you might be able to use the drivers directly from the manufacturer of the motherboards chipset. The main chipset makers are: Intel, Via, nVidia, SiS, and Ali. To find out what chipset and motherboard is inside your computer, you can use a free tool such as CPU-Z. Defragment As advanced as hard drives have become, one item they are not very good at is housekeeping, or maybe that should be drive keeping. When files are created, deleted, or modified it's almost a certainty they will become fragmented. Fragmented simply means the file is not stored in one place in its entirety, or what computer folks like to call a contiguous location. Different parts of the file are scattered across the hard disk in noncontiguous pieces. The more fragmented files there are on a drive, the more performance and reliability suffer as the drive heads have to search for all the pieces in different locations. The Disk Defragmenter Utility is designed to reorganize noncontiguous files into contiguous files and optimize their placement on the hard drive for increased reliability and performance.1 All versions of windows came with some sort of disk defragmenter and can be accessed by going to: Start | All Programs | Accessories | System Tools | Disk Defragmenter. The defragmenter under Windows 95/98/ME is quite picky and often restarts itself if another program uses the system. For this reason, its recommended to use a third party tool. The defragmenter for Windows 2000/XP/2003 is not affected by this problem. Some popular third party tools are: Diskeeper, PerfectDisk, O&O Defrag, and Speed Disk. Disable CPU Intensive Programs There are many programs that can eat up spare CPU time. This can result in DC++ taking longer to hash files in your share. If you use a screen saver, disable it; it takes a lot of CPU time away from DC++. If you use a distributed computing program (SETI, Protein folding, Key cracking, etc), disable it while DC++ is initially hashing your share. With DC++ closed, take a look at how much CPU time is being used (Win9x/ME users use Process Explorer, Win2K/XP use Task Manager [Ctr+Alt+Del | Task Manager]). If the CPU usage is above 10%, find out which offending program(s) need to be closed. Troubleshooting: Q: DC++ hangs when hashing A: This is most likely caused because you have a corrupt file system. Windows 9x/ME users need to run Checkdisk (Programs | Accessories | System Tools | Checkdisk). Windows 2000/XP need to run chkdsk (Start | Run | cmd /k chkdsk c: /f). You'll need to do this on each drive letter. Q: Why is DC++ using 100% of my CPU? A: DC++ is most likely hashing your files. Look in the bottom left corner of the DC++ window. You should see the files names change as it finishes hashing each one. If it says File list refresh finished for an extended period of time and DC++ is still using 100% of the CPU, then it's likely that DC++ is crashing. Kill the application and restart it. Q: Why is DC++ hashing my files? A: Reread the top of this FAQ. DC++ Change Log Related Entries: 0.669: Redid some of the hash storage code, should be slightly more efficient, Hash index format change, Improved efficiency for small files (<=64KiB) in the hash storage 0.666: Slight memory save for hash database, Fixed MyINFO spam when hashing 0.4034: Fixed a few issues with files not being hashed correctly (thanks garg) 0.4033: Fixed a TTH hash speed bug (hashing should be much faster now), Added hash progress dialog, hashing is run at a higher priority when dialog is shown 0.4032: DC++ will only share files that HAVE BEEN HASHED 0.402: Hash speed tweaks, check if it's any better 0.400: Hashing is now mandatory 0.307: Added file hashing, turn it off in advanced settings (experimental) 46. Downloading a file at unrealistic speeds Question: Answer: When you download a file at incredible/unrealistic speeds for your connection, its very likely you have just got a fake file. One will notice this only if the DC++ option, Use safe and compressed transfers is enabled. This happens because the fake file is made up of repetitive characters, which DC++ recognizes and compresses for sending. Most of the time, these fake files present themselves in file formats such as: .avi, .bin, .iso. If you are still unsure if the file is fake, simply try to use it; if it does not work then there is even more assurance that it is. If you happen to download one of these files, do the community a favor and alert the operators in the hub about the user and fake file(s). 47. What are magnet links? Question: Answer: A magnet link is an open URI-scheme and supporting practices/code for enabling seamless integration between websites and locally-running utilities, such as file-management tools or peer to peer clients. Magnet links have been implemented in DC++ 0.4032. With this version of DC++, it will register, by default, to handle any magnet: links you click on in web pages. If you click on one of these links, DC++ will pop up and ask you if you want to search the DC network (or hubs you're connected to, at least) for this hash. You can create your own magnets in the search frame, file list window, and download queue by a new contextual menu choice - just right click on the file you want a magnet for, and select Copy magnet link to clipboard. Since magnet links are an open standard for all (peer to peer) applications, there are hash types in some magnets that DC++ cannot handle. It can only handle magnets that contain a tiger tree hash. An example link looks like: magnet:?xt=urn:tree:tiger:UXNWMYERN37HJNXB7V6KDJKZXMFBIQAGMDMYDBY&dn=DCPlusPlus-0.4032.exe. Submitted by GargoyleMT DC++ Change Log Related Entries: 0.4032: Added bitzi.com lookup and magnet link copy (thanks garg), Added (limited support for) magnet link handling (thanks garg), Magnet handler included in installer (thanks garg & magnethandler author) Abusing 48. Is it possible to removing the ++ tag / make DC++ undetectable? Question: Answer: Yes. You can download the source, remove the <++ tag and recompile it. Alternatively, some individuals have done that already and put it online. Just remember that when an OP finds out you are faking (your icon will turn from green to blue when they get your filelist) you WILL get permanently banned from that hub. As to making DC++ completely undetectable, I'd say it's rather difficult without disabling a lot of the available features such as different nicks on different hubs, bzip compression and other extensions that dc++ uses. So far, I haven’t run across a hacked DC++ client that hasn’t been detected. There are hub scripts and client applications that use various methods to determine your client type. 49. What is Share Faking? Question: Answer: This is where you falsely inflate your projected file size being shared on Direct Connect. Basically, the “reasoning” behind doing this is the large and elite hubs require users to share in the range of 80+ GB to even enter their hub. Many people do not have the hard drive capacity to share that much. They feel that the 400 other hubs out there, that don’t have these high requirements, are not good enough for them. So they fake their fileshare to enter these “better than average” hubs. Here is what the creator of the sharefaking tool says about this: first off, i dont think my share fakers are killing dc because there are 100,000 other people who don't use my share faker. second, if you are very smart when using your faker, you hardly get banned. lol i get banned off oh 5 hubs out of the 400 i connect too when i need some thing off dc. and this sharing 'idology', you are bullshitting when u say if every body share faked and there would be no share to downloadin from, thats a lame statment, this would be true if dc was smaller. but there are lot of people and not every body will share fake. If you do not have the hard drive capacity to join these top hubs, then you do not belong there. All the users have put in the money and time to have valid shares of these large sizes. Fakers destroy the DC community. Fakers are easily caught by a simple share check. Those who resort to more clever methods to fakeshare with garbage files can also be easily caught. 50. What is Slot Locking? Question: Answer: This “freezes” the slots on a DC client so no one else can connect (because all slots are full). Plain and simple, this is a pure leech mentality. This is simply caught for DC++ clients because it ALWAYS will allow a filelist upload (well most often, I wont go into details), regardless if slots are full. There is a version of DC++ out there that will allow only OPs to get the users filelist and lock the slots for normal users 51. What is Tag Faking? Question: Answer: A tag is the DC++ tag, i.e. <++ V:0.305,M:A,H:0/1/0,S:2 ( meaning of the <++ tag) A faker can simply be defined as, having a false or misleading appearance; fraudulent. That being said, a tag faker is someone who either hides or fraudulently modifies their DC++ tag. OPs permban any user on sight who are doing this.