I'd like to filter a specific packet sequence, if not by process, then by IP address/port combination.
Writing a DLL, modifying the process in question, or writing a program which hooks all functions isn't a viable solution; for whatever reason, hooking WSARecv fails.
I considered IPSEC, but I'm not sure if that allows you to block the content found in a packet. If it does, does anyone have a link to an article describing such a feature?
Thanks.