BPF filters for the intimidated

[Paul Schmehl <pauls () utdallas edu>]

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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