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Unread 17-12-2007, 07:55   #1
FreeWorm
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Default Vista and XP/SP2 TCPIP connection limitation Patchers

Windows XP SP2 TCP Connection Limit (Event ID 4226)

To change or remove the limit imposed on connection attempts in Windows XP SP2, you can use the following program that works on every language of Windows XP:

Download: Event ID 4226 Patcher version 2.23d
Website: http://www.lvllord.de/



Windows Vista tcpip.sys Connection Limit Patch for Event ID 4226

Download: Windows Vista Event ID 4226 Auto Patcher

Instruction: Unpack the archive and run InstallPatch32.bat (for x86) or InstallPatch64.bat (for x64). Run UndoPatch.bat to uninstall concurrent half-open TCP/IP connection limit patch.

See more information here:
http://www.mydigitallife.info/2007/0...event-id-4226/


Last edited by FreeWorm : 09-01-2008 at 17:22.
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Unread 09-01-2008, 17:15   #2
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Thanks a lot for Lorissa's information

Code:
Microsoft issues new Windows TCP/IP patch 01/08/08

This latest patch, deals with vulnerabilities in Windows TCP/IP, and will change your half-open connections back to the default setting of 10 for XP (and I believe 5 for Vista).

The patch is definitely recommended, but if people do not run the LvlLord patch again following this upgrade, they will be receiving numerous "timeout" problems when testing proxies with proxy analyzing software.

http://www.lvllord.de/

by Lorissa

Last edited by FreeWorm : 09-01-2008 at 17:22.
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Unread 12-05-2009, 09:03   #3
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For you in windows XP Sp2 ... maximum concurrent half-open connections how much it's best ?

Last edited by likevn : 12-05-2009 at 09:06.
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Unread 03-07-2009, 23:48   #4
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Thumbs up Half-open limit fix

another1 but more user friendly application is Half-open limit fix, http://half-open.com/

Quote:
Half-open limit fix is a program designed to change the maximum number of concurrent half-open outbound TCP connections (connection attempts) in the Windows system tcpip.sys file.

Microsoft first introduced this limit in Windows XP SP2 and it is present in later versions, which purpose is to try to slow the spread of virus and malware from system to system, and also to reduce the impact of infected systems participating in DoS (Denial of Service) attacks.

Microsoft's limiter makes it impossible for Windows systems to have more than 10 concurrent half-open outbound connections; after 10, new connection attempts are put in a queue and forced to wait. Thus, the speed of connection to other PCs is limited.Therefore, the speed of connection to other computers is actually limited.

P2P (peer-to-peer) programs like µTorrent, BitComet, eMule, P2P TV, etc.,are generally the programs mostly affected. Since bittorrent apps tend to use up all 10 of the half-open connections, other Internet activity—especiallythe loading of web pages—can become extremely slow. The delay before opening a new page can take over ten seconds: this delay occurs regardless of your Internet connection speed.

Half-open limit fix remedies this problem by increasing the maximum limit of half-open connections. For most Internet users, changing the limit to 100 will be more than sufficient.

Download page, http://half-open.com/download_en.htm
Quote:
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, Chinese (Simplified and Traditional), Czech, French, German, Greek, Hebrew, Italian, Japanese, Korean, Norwegian, Portuguese (Brazilian and European), Romanian, Russian, Spanish, Swedish, Thai, Turkish and Ukrainian. (help translate)
Size: 253KB.



Half-open limit fix 4.1

Instruction:
1) Run Half-open limit fix
2) Choose a new limit of concurrent half-open outbound connections quantity and press "Add to tcpip.sys" (for most Internet users, changing the limit to 100 will be more than sufficient)
3) Restart computer and enjoy

Running the program again may be required if Windows updates tcpip.sys, such as when a new SP is released. If program ceases to work on an updated tcpip.sys file, a new version will be available at this site.

Vista and Windows 7 users: Perhaps in the future, after updating Windows or installing a new Service Pack, a "Test mode" watermark may appear. It may appear because in all versions of Vista and Windows 7 (except in Vista x86 without SP1) there is the imposing drivers signature check, and the tcpip.sys file sign with test signature after patching. In such case, it should only require a simple re-installation of the program to remove the watermark.

direct download link: http://half-open.com/Half-open_limit_fix_4.1.exe



Questions page:
Quote:
Is the program safe?
Half-open limit fix creates a backup copy of the edited tcpip.sys file, so you can at any moment restore the original file at the press of a button. I have tried to make the program as safe as possible but cannot offer any guarantee. Use program at your own risk.

What is the optimal value of concurrent half-open outbound connections limit?
I consider the optimal value to be an equal 100. Increasing the limit will have effect only if you run several P2P programs simultaneously (e.g., µTorrent, BitComet, eMule, P2P TV, etc.), or your PC works as a server.

Does the limit cut down my Internet speed?
To check whether this limit cut down your Internet speed, look in Windows Event Viewer (Start -> Control Panel -> Administrative Tools; or Start -> Run -> EventVwr.msc). Each message {EventID 4226: TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts} reports if the limit has worked. Usually it means that the network worm (virus) or any P2P program works on your PC. If such messages in Event Viewer appear, most likely you garnered a problem and will have difficulties opening web pages in a browser.

The program started for the first time, but it shows 50/1000/16777214 half-open connections, instead of 10 by default. What does it mean?
Most likely you are using an unofficial Windows build in which the maximum quantity of half-open connections is already increased in the tcpip.sys driver. Also, maybe you used a foreign patch, which has changed this value. If you don't have new events 4226, you may decrease this limit or not change it.

Why in Windows 7 and Vista the limit can be from 1 to 255 and infinity?
Because in these operating systems, limit is stored in 1 byte in the tcpip.sys file. That is, it can accept values from 0 to 255. Even if at value 255 new events 4226 continue to appear, you can set the value to infinity (∞). That means switching-off the limit of simultaneously half-open connections.

Does the limit of concurrent half-open connections present in Windows Server 2003/2008, Vista SP2 and Windows 7 beta start from build 7100?
No. It is physically present in the tcpip.sys file but has no effect; thereby, there is no Event ID 4226 or Internet deceleration when a P2P program runs in this versions of Windows.
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Unread 02-12-2010, 12:38   #5
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Many thanks for this patcher. very useful
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Unread 03-12-2010, 10:05   #6
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Dear Thanks I need it
good job
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Unread 10-02-2011, 09:26   #7
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Would this program work at XP SP3 system?
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Unread 31-10-2011, 12:53   #8
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Talking Re:

Quote:
Originally Posted by innave View Post
another1 but more user friendly application is Half-open limit fix, http://half-open.com/




Download page, http://half-open.com/download_en.htm



direct download link: http://half-open.com/Half-open_limit_fix_4.1.exe



Questions page:
Well Thanks for upgrade information it is useful really good but now problem is that some user leave Asia medal east some user leave usa like all other country so now tell us and help me any new half open and also use for all members will you please post here any updated
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Unread 03-11-2011, 02:38   #9
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thanks for sharing this....Seems Right thing/...
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Unread 02-09-2012, 11:27   #10
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thanks for you useful help
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