Remove the limit on TCP connection attempts

 
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AJWesley
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Joined: 13 Jan 2008
Posts: 39
Location: Kentville, Nova Scotia, Canada

PostPosted: Sun Jan 27, 2008 6:14 am    Post subject: Remove the limit on TCP connection attempts Reply with quote

Windws XP SP2 introduces a few new twists to TCP/IP in order to babysit users and "reduce the threat" of worms spreading fast without control. In one such attempt, the devs seem to have limited the number of possible TCP connection attempts per second to 10 (from unlimited in SP1). This argumentative feature can possibly affect server and P2P programs that need to open many outbound connections at the same time.

Rant: The forward thinking of Microsoft developers here is that you can only infect 10 new systems per second via TCP/IP ?!?... If you also consider that each of those infected computers will infect 10 others at the same rate:
second 1: 1+10 computers
second 2: 10+10*10 computers (110 new ones)
second 3: 10+100*10 computers ( 1110 new ones)
second 4: 10+1000*10 computers (11110 new ones)
....
all the way to 10*60 + 10^60 computers in a single minute (that's a number with 60 digits, or it would far exceed Earth's population). Even if we consider that 90% of those computers are unreachable/protected, one would still reach ALL of them within a minute.

To change or remove the limit, you can use the following program: (This patch is safe. Read the directions carefully :)

http://www.lvllord.de/

Here's another good program that follows the last: (Description: The TCP Optimizer is a free, easy Windows program that provides an intuitive interface for tuning and optimizing your Internet connection. There is no installation required, just download and run :)

http://www.speedguide.net/downloads.php
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bprsk8r4272
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Joined: 07 Mar 2006
Posts: 124
Location: Rochester, NY

PostPosted: Sun Jan 27, 2008 2:51 pm    Post subject: Reply with quote

thanks to AJ i used http://www.lvllord.de/ works perfect
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lagibosen
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Joined: 29 Jun 2008
Posts: 2

PostPosted: Sun Jun 29, 2008 1:27 am    Post subject: Reply with quote

thanks AJ, really cool stuff :)
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AJWesley
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Joined: 13 Jan 2008
Posts: 39
Location: Kentville, Nova Scotia, Canada

PostPosted: Thu Jul 03, 2008 2:07 am    Post subject: Reply with quote

lagibosen wrote:
thanks AJ, really cool stuff :)

Glad I could help, lagibosen!
The new updates to XP change the TCP limit again. I noticed that the *new* patch reports that the manual changes remain, although in some instances they are actually reduced again to default. I apply the patch ever time I update XP now -- just to be certain. This does make a difference in server performance...
AJ
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anybody
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Joined: 17 Mar 2008
Posts: 90

PostPosted: Wed Dec 16, 2009 12:03 pm    Post subject: Reply with quote

Is there any way to test this?

How will this affect websites you have set up in abyss?

Define a half open connection.
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TRUSTAbyss
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Joined: 29 Oct 2003
Posts: 3714
Location: USA, GA

PostPosted: Thu Dec 17, 2009 12:46 am    Post subject: Reply with quote

The ten connection limit is only affected by features like file sharing, not web related. I read this in my Windows Server 2003 book for the 70-290 exam.
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anybody
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Joined: 17 Mar 2008
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PostPosted: Thu Dec 17, 2009 1:09 am    Post subject: Reply with quote

I see that you mentioned Windows server 2003 but I'm using an extremely stripped out version of Windows XP and no, it isn't hacked. I have no need for any of their "bloatware" on my server. Especially when I don't use any of it on my web server. The cool thing about the installation CD is it is customizable.

The question is, is there any way to test it?
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