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I was wondering, if the TCP/IP stack is part of the kernel or running as a service? Where do I find the TCP/IP stack in sysinternals ProcExp?

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I belive the TCP/IP stack is part of the kernel - why, do you want to be able to shut it down? –  Nate Koppenhaver Oct 25 '11 at 17:17
    
for example yes, but I was just curious where to find it? –  Ian Oct 25 '11 at 17:20
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tcpip.sys is IPv4 and tcpip6.sys is IPv6. They're in the /WINDOWS/SYSTEM32/drivers dir. Since they are .sys drivers they will run in the kernel and probably not show up in ProcExp –  Nate Koppenhaver Oct 25 '11 at 17:22
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The TCP/IP stack is implemented as a driver (tcpip.sys for IPv4 and tcpip6.sys for IPv6), which means that it runs in the kernel and will not be listed as a process with ProcExp, though if it has a services viewer you will be able to find it there.

I don't have ProcExp but I do use Process Hacker (which is pretty much the same) so here is a screenshow of Process Hacker's running services viewer with the TCPIP service highlighted:

Process Hacker with tcpip service highlighted

From there you should be able to stop, start, and disable the service (you can also do that with msconfig under the 'Services' tab -- for WinXP it's listed as 'TCP/IP NetBIOS Helper')

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