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Windows Half-open limit fix (patch) Version 2.8 (October 5, 2008)

Sunday, October 05, 2008 10:07:54 AM (GMT Daylight Time, UTC+01:00)

 

NEW VERSION RELEASED TODAY !!

Tried & Tested Working with Vista x86 (32bit) SP1. Works with all versions of windows.

Program Half-open limit fix intend for changing maximum number of concurrent half-open outbound TCP connections (connection attempts) in system file tcpip.sys.

This limit is entered by company Microsoft trying to make slower virus spreading from infect computer and cut down opportunities of participation of a computer in DoS attacks.

First this limit was entered in SP2 for Windows XP and present at all new versions of Windows. Limit consists that the computer is not authorized to have more than 10 concurrent half-open outbound connections. At achievement of a limit new attempts of connections are put in turn.

Thus, speed of connection to other computers is actually limited.

This limit is especially critical for P2P programs (µTorrent, BitComet, eMule, P2P TV etc.) users. When the P2P program works, pages in a browser can be loaded extremely slowly. The delay before the beginning of opening can make some tens seconds irrespective of speed of your connection.

Half-open limit fix cleans this limit, that is increases the maximal limit of half-open connections. For the overwhelming majority of users there will be sufficient the limit equal 100.

FAQ :

Is it safe?
Half-open limit fix creates backup copy of edited tcpip.sys file, and you at any moment can restore the original file, pressing of one button. I have tried to make the program as much as possible safe. In any case, use the given program at own risk.
What is the optimal value of concurrent half-open outbound connections limit?
I consider, that optimal value is equal 100. The further increasing the limit will have effect, only if You use simultaneously several P2P programs (µTorrent, BitComet, eMule, P2P TV etc.) or hold a server on a computer.
Does the limit cut down my internet speed?
To check up, whether works on your computer this limit, look in Event Viewer (for example via 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» speaks about that limit has worked.
Usually it means, that the network worm (virus) or any P2P program works on your computer. If such messages in Event Viewer appear very often most likely you sweep up a problem and - you will have difficulties with opening web pages in a browser.

Versions :

Version 2.8 (October 5, 2008)
- Added possibility to check the limit in Windows XP, using user account without administrator rights
- Added additional checks of possible errors

Version 2.7 (September 28, 2008)
- Added possibility to set unlimited quantity of half-open connections in Vista
- Added support of Unicode

Version 2.6 (September 19, 2008)
- Fixed problems of compatibility with Vista x64 without SP1
- Stability is improved

Version 2.5 (September 8, 2008)
- Fixed the error in Vista when tcpip.sys could not sign if the previous versions of the program were used before
- Fixed problems which could arise in Vista in some languages

Version 2.4 (August 30, 2008)
In comparison with version 1.0 it has been corrected very many. Has been included support of Windows XP SP2(x64), 2003 Server SP1(x86)/SP2(x86,x64), Vista without SP(x86,x64) and with SP1(x86,x64).
In comparison with version 2.3:
- Fixed the problem in Vista x64, arising at some people. It has been connected with opening access to tcpip.sys and user32.dll.mui files. (versions 2.2 and 2.1 have not this problem)
- Improved checks of the version of the tcpip.sys backup copy. If Windows will update tcpip.sys file, the program at start will create a new backup copy
- Fixed the rare error in button "Refresh" in Vista
- Additional checks of compatibility before start
There is no need to repatch for people who did not have problems with previous versions.

Version 1.0 (July 5, 2008)
The first version of Half-open limit fix. Support of Windows XP SP2(x86) and SP3.

Windows Half-open limit fix (patch) - Home

   
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Posted by : Gunny