[Bro] Bro Digest, Vol 109, Issue 14
dn1nj4 at gmail.com
Tue May 12 09:51:18 PDT 2015
> Date: Tue, 12 May 2015 10:04:56 -0600
> From: James Lay <jlay at slave-tothe-box.net>
> Subject: Re: [Bro] PPPoE Capture IP Layer Being Stripped
> To: bro at bro.org
> Message-ID: <b60c0945aa4749712ec607bdff0a435c at localhost>
> Content-Type: text/plain; charset=US-ASCII; format=flowed
> On 2015-05-12 07:43 AM, Jason wrote:
> > Good day all,
> > One of my sites has all PPPoE traffic on the link I'm monitoring. The
> > .log files are all generated correctly, but PCAP files end up with
> > stripped IP layer information. This was easy to reproduce in bro
> > 2.3.1 on Ubuntu by doing:
> > tcpdump -nn -i ethX -w test.pcap
> > bro -r test.pcap -w bro.pcap
> > The tcpdump traffic in test.pcap looks fine, but the bro pcap comes up
> > as Ethernet traffic with an unknown type.
> > Is this a known bug? Or is there perhaps some configuration that
> > needs to be changed in bro support this traffic?
> > Thanks in advance,
> > Jason
> I run bro on ppp0, but I don't think I've seen this issue. Have you
> tried having bro listen on the physical interface instead?
> I have indeed. Live capture was where the problem was first noticed. I
moved to an offline/tcpdump test as part of my troubleshooting to ensure
nothing else was causing problems (link issues, PF_RING, etc).
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