Re: BPF question "port > 2000"?

[rmkml <rmkml () yahoo fr>]

Hi Jason,
Check with bpf filter: 'tcp[2:2] > 0x07D0' # tcp dest port > 2000
http://www.infosecwriters.com/text_resources/pdf/JStebelton_BPF.pdf 
Regards
Rmkml


On Fri, 21 Jan 2011, Jason Haar wrote:

> On 01/20/2011 10:31 PM, Sandro guly Zaccarini wrote:
> > portrange 2001-65535?
> >
> > sz
> Ha! Simple as that. We're running on CentOS4 systems - and tcpdump
> (which I was relying on for testing filters) is only 3.8 and doesn't
> support portrange, however I see CentOS5 has tcpdump-3.9 and it does -
> so I guess that's when the feature came in.
> Thanks!
> Cheers
> Jason Haar
> Information Security Manager, Trimble Navigation Ltd.
> Phone: +64 3 9635 377 Fax: +64 3 9635 417
> PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1
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