RE: BPF filters for the intimidated

[Paul Schmehl <pauls () utdallas edu>]

I didn't realize bpf filters could use tcpdump-type input.  *That* I can 
already do.

--On Friday, July 23, 2004 03:18:05 PM -0400 Jeff Dell 
<jdell () activeworx com> wrote:

> I don't know of a tutorial, but you can read about BPF (Berkeley Packet
> Filter) on the TCPDump man page at:
> http://www.tcpdump.org/tcpdump_man.html
>
> You will quickly see that there is really no need to know hex unless you
> are doing some complex filtering...
>
> Cheers,
> Jeff
>
> -----Original Message-----
> From: snort-users-admin () lists sourceforge net
> [mailto:snort-users-admin () lists sourceforge net] On Behalf Of Paul Schmehl
> Sent: Friday, July 23, 2004 2:16 PM
> To: Snort-User Mailing List
> Subject: [Snort-users] BPF filters for the intimidated
>
> Does anyone know a good source for a tutorial on BFP filters?  Reading
> the  man page has me crossing my eyes and growning.
>
> I want to capture udp packets on port 53 to one host, including the
> entire  payload.  I've figured out the hex address for the host, but the
> rest  escapes me.
>
> Paul Schmehl (pauls () utdallas edu)
> Adjunct Information Security Officer
> The University of Texas at Dallas
> AVIEN Founding Member
> http://www.utdallas.edu/ir/security/
>
>
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Paul Schmehl (pauls () utdallas edu)
Adjunct Information Security Officer
The University of Texas at Dallas
AVIEN Founding Member
http://www.utdallas.edu/ir/security/


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