However, as far as I know, iptables is perfectly happy creating rules for non-existent 
interfaces. Of course this can have changed, but when I first learned to use iptables 
the doc specifically sugested setting up iptables rules before bringing up the network. 
By the way, this is what I do at my firewall (allthough it runs debian, not gentoo), 
first starting iptables and then networking. Probably it's paranoid, but that way there 
is not even a theoretical possibility of an unsecure window during boot (for example, 
if a misconfiguration brings up a vulnerable service before the firewall is up).

/Staffan Emrén

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