On Fri, 19 Mar 2004, Tomi Kaistila wrote:

> My question is, can I make a rule that allows such replies to pass the
> packet filter, but to drop if it is not such a reply or similar signal? I
> tried using the setup and established flags but either I did something wrong
> or it just didn't work out that way.
>
> --
> Tomi

What you want is a stateful firewall, aka dynamic firewall rules.

Just use

ipfw add allow ip from yourip to any keep-state

And ipfw will do what you want.

This is described in the ipfw manpage, although it's perhaps not explained
as well as it could be.

Mike "Silby" Silbersack
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