self-generated packet question

[Michael Sierchio]

Earl A. Killian wrote:
> Do packets generated by the ipfw host get processed for both input and
> output or just output?  If they are filtered on input, then it seems they
> can be detected with "in recv any", right?

They aren't received on any interface, no.  They can be filtered
on output (from me to any, etc.)

(presumably you already have an allow rule like allow ip from any to any via lo0).