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I'm not trying to find established TCP connections. I have a Windows 2008 R2 server and my host-based L3 firewall is showing one TCP connection ATTEMPT to a remote address. The connection is not established as the servers are not allowed to communicate on the gateway firewall. What's the easiest and non-obtrusive way to find out this process? I cannot install sniffing tools like Wireshark on this server due to security reasons.

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Given your access restrictions, you can do this:

  1. Task Manager > View > Select Columns > PID
  2. netstat -ano | find "127.0.0.1" (put whatever IP you want in the quotes)
  3. Compare PID to active connections.

More information on how to use find, and netstat

  • What about netstat -ano 1 | find "remote address"? – security_obscurity Oct 29 '15 at 5:13
  • 1 means it's refreshing every second. If you want to do that, sure. Here's more info on find. – Mark Buffalo Oct 29 '15 at 5:14

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