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Win2003 SP2 tcpip.sys patch


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Since I cannot find a connection limit (to add more than 10 simultaneous connections) patch to tcpip.sys on Windows 2003 Server, I tried the old LvlLord's patcher and it seems to be working.

I also tried to confirm this on xp-Antispy by clicking on the menu Special -> Connection Limit... and it already shows 50 connections and looks patched nicely.

Can anybody confirm this using other means?

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The limit is for 10 simultaneous half open connections. You want to limit those because it can be a DoS vector...

Oops... :blushing:

I had a totally different "grasp" on tcpip.sys patching. Thanks nmX.Memnoch and nitroshift for clearing this for me.

You mean 2003 SP2 would still be considerable fast (also for file sharing) even if I don't increase the "10 simultaneous half open connections"? I don't know if it's just me, but I noticed just a little bit of decrease in network performance after I upgraded to SP2.

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You mean 2003 SP2 would still be considerable fast (also for file sharing) even if I don't increase the "10 simultaneous half open connections"? I don't know if it's just me, but I noticed just a little bit of decrease in network performance after I upgraded to SP2.

Yes, it will still be fine. To be honest, I'm not even sure if Server 2003 has this limit imposed (although I would think it would).

The network performance drop that you noticed was probably because XP SP2 turned the firewall on. :)

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  • 3 weeks later...

Half open connections being limited does however limit the speed in which I do vulnerability scanning (Harris Stat Guardian and Retina) .

So I do patch my TCPIP at least I did in XP Server seemed to have been higher limit but I haven't checked as of SP2.

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