ipfw and tun0

Dirk Gouders gouders at et.bocholt.fh-ge.de
Thu Jul 21 22:53:55 GMT 2005


I just started to use an ADSL line with PPPoE and want run a firewall
between it and my local network.  What I am wondering about is that
even if I only have the default everything-blocking rule (deny ip from
any to any) I still see incoming packets on tun0 with tcpdump.

Is this, because the firewall rules get checked after the packets
leave the tun0 interface?  On what interface should I run tcpdump then
to check if my rules are working as expected?


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