Snort mailing list archives
Re: simultaneous snort and tcpdump
From: Carl Gibbons <cgibbons () du edu>
Date: Sat, 21 Sep 2002 20:00:07 -0600 (MDT)
Thanks, Bennett and Gary. I was needlessly complicating matters. Perhaps I still am: one reason I want simultaneous snort/tcpdump is that "snort -b" only seems to record packets on which it finds a rule match, and I want to record other traffic as well. Perhaps there's an elegant, efficient way to do so with a single snort process? - Carl Bennett Todd wrote:
As far as I know, you can just run your snort and your tcpdump at the same time...
Gary Flynn wrote:
My experiences are the same as Bennett's. I've got ntop and snort running on the same interface and they seem to be sharing it fine. When I first contemplated doing this, I did some superficial research that suggested to me that this wouldn't be a problem. After diving through pcap code and then into the kernel network handling code, I came to the conclusion that all pcap applications have a PF_SOCKET open whose packet_rcv() functions are sequentially called by the kernel. This seems to be very nicely documented in the following two articles: http://www.linuxjournal.com/article.php?sid=4852 and http://www.linuxjournal.com/article.php?sid=5617
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Current thread:
- simultaneous snort and tcpdump Carl Gibbons (Sep 20)
- Re: simultaneous snort and tcpdump Bennett Todd (Sep 20)
- Re: simultaneous snort and tcpdump Gary Flynn (Sep 20)
- Re: simultaneous snort and tcpdump Carl Gibbons (Sep 21)
- Re: simultaneous snort and tcpdump Jason (Sep 22)
- Re: simultaneous snort and tcpdump Carl Gibbons (Sep 26)
- Re: simultaneous snort and tcpdump Bennett Todd (Sep 26)
- Re: simultaneous snort and tcpdump Carl Gibbons (Sep 26)
- Re: simultaneous snort and tcpdump Jason (Sep 26)
- Re: simultaneous snort and tcpdump Gary Flynn (Sep 20)
- Re: simultaneous snort and tcpdump Gary Flynn (Sep 26)
- Re: simultaneous snort and tcpdump Martin Roesch (Sep 26)
- Re: simultaneous snort and tcpdump Bennett Todd (Sep 20)