Increase Torrent & P2P downloading speed on Windows 7 by Remove TCP/IP Connection Limit

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As Windows 7 has limits the torrent and p2p download speed to 10 concurrent half-open outbound TCP connections only for security purpose. Some of users might experiences slow torrent & P2P downloading speed on Windows 7 due to the concurrent downloading connection to 10 locking limitation. Normally this concurrent half-open outbound TCP connections limitation doesn’t effect to normal computer user but frequent p2p and bit torrent users may find some issue.  

So, i have gathered some small windows 7 patching software to remove the concurrent half-open outbound TCP connections limitation.  Which you can optimize and speed up the uploading and downloading transfer speed of BitTorrent and eD2K peer-to-peer (P2P) protocol on Windows 7. Beside that, it will increasing popular P2PTV performance such as TVants, PPStream and PPLive to stream the video channels faster and more smoothly, enhancing viewing movie or soccer match experience.

Tools to remove concurrent half-open outbound TCP connections limitation on Windows 7:

TCP z – Windows 7 tcpip.sys patches utility

TCP-Z is gui utility and patches tcpip.sys to increase limit imposed on concurrent half-open outbound TCP connection attempts.

tcp z tcpsys patcher windows 7 

Download TCP-Z for Windows 7 x86

Half Open Limit Fix – Change Windows 7 concurrent half open outbound TCP connection numbers

Half-open limit fix can change the maximum number of concurrent half-open outbound TCP connections (connection attempts) in the Windows 7 system file tcpip.sys. After you have change the value of maximum outbound TCP connection, restart your Windows 7 OS to allow the changes take effect.  

half open tcpip sys limit fix windows 7

Beside that, Half Open Limix Fix also supports Windows XP SP1 (x64) /SP2( x86,x64) /SP3, Vista without SP(x86,x64) and with SP1(x86,x64), Windows 7 beta(x86,x64).

Download Half Open Limit Fix

Posted by km on April 15, 2009 in: Windows 7 Tweak

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{ 5 comments… read them below or add one }

Beautiful WALLPAPER THEMES April 27, 2009 at 12:27 pm

Woa, good work, keep up this !

Prathamesh R Kudtarkar October 27, 2009 at 3:50 pm

Well the Final Windows 7 does not limit half open connection!!!.
so you really dont need to patch it…

JD November 13, 2009 at 2:51 pm

works like a charm…went from 10kb/s to 600 kb/s

Minuz January 25, 2010 at 1:48 pm

This don’t work with the newest version of Windows7 (64 in my case.)

“The patch is not required, because this Windows version has no limit of half-open connections quantity.”

Half-open_limit_fix_4.1 :
Operating system: Windows XP SP1(x64)/SP2(x86,x64)/SP3, Vista without SP(x86,x64) and with SP1(x86,x64), 7 beta(x86,x64).
Interface language: English, Arabic, Chinese (Simplified and Traditional), Czech, Estonian, French, German, Greek, Hebrew, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazilian and European), Romanian, Russian, Spanish, Swedish, Thai, Turkish and Ukrainian. (help translate)
Size: 256KB.

CP2 March 28, 2010 at 6:19 pm

I have Windows7 Home Premium, 32bit version, and I get the same message:

“The patch is not required, because this Windows version has no limit of half-open connections quantity.”

So, the half-open limit doesn’t seem to be needed, until my further tests prove otherwise. :)

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