This sounded like an interesting challenge, so I whipped something together that seems to work. Maybe it's what you're looking for, or maybe not.
So, the idea I came up with is relatively simple: each process is going to open an ephemeral port to connect to the known port of the service. Let's take, for example, a simple SOCKS5 proxy I've tossed together over SSH: nohup ssh -D 8000 -C -N [email protected] >/dev/null 2>&1 & I typically use this everywhere that's not at home, and push ALL my traffic through it. Hey, security. Anywho, on my mac, I was able to find the ephemeral port that it was using: $ netstat -ntl|grep 192.168.1.5|grep 22 tcp4 0 0 192.168.1.156.61697 192.168.1.5.22 ESTABLISHED Now we've got an ephemeral port to work with. Some clever awk- and sed- foo and you can grab JUST that port. Capturing the traffic is simple enough…. $ tcpdump src port 61697 So, we've got the traffic for this individual socket, but who does it belong to? $ sudo lsof -i 4tcp:61697 Password: COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ssh 17878 hkokx 3u IPv4 0x225a0a58298b9315 0t0 TCP 192.168.1.156:61697->myhost.com:ssh (ESTABLISHED) There's your pid and process name. This was fun. Thanks for the challenge. :) -- Hans Kokx On Tuesday, March 12, 2013 at 12:03 AM, Sherif El-Deeb wrote: > I have been trying to figure out a way to "capture/filter" network > traffic per process, not per host/interface in a windows environment > "even though I'd be curious to know how that could be done in *n?x/OS > X" . > > What I want to achieve is create a PCAP file for each process id that > was executed and communicated over the network. > > help, please. > Thanks and regards, > > Sherif. > _______________________________________________ > Pauldotcom mailing list > [email protected] (mailto:[email protected]) > http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom > Main Web Site: http://pauldotcom.com > >
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