North American Network Operators Group
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Re: Network IP analysis?

  • From: Perry E. Metzger
  • Date: Wed Jun 25 12:57:01 1997 
Joe Shaw writes:
> A Network General sniffer will do this for you, and it's a really nice
> (read expensive) piece of equipment to have.  They go for around $26,000
> (someone correct me if I'm wrong... I've never bought one myself).

tcpdump on a cheap NetBSD/FreeBSD/BSDI box (even an old 486 will do
just fine) will easily keep up with all of your ethernet traffic, and
its free, not $26,000. Its also VERY flexible -- I've never needed
anything else. Best to do this on a box that does native BPF, though
(asn an example SunOS does not do BPF and NIT can't handle the traffic
without dropping most stuff).

Perry