> > On my router I have the following policy:
> >
> > loc             net             ACCEPT
> > loc             $FW             ACCEPT
> > loc             all             REJECT
> > $FW             net             ACCEPT
> > $FW             loc             REJECT
> > $FW             all             REJECT
> > net             $FW             DROP
> > net             loc             DROP
> > net             all             DROP
> > all             all             REJECT
> >
> > and the following rules:
> >
> > DNAT            net     loc:192.168.0.3 tcp     50000
> > DNAT            net     loc:192.168.0.3 udp     50000
> > ACCEPT          $FW     loc     icmp
> > ACCEPT          $FW     net     icmp
> >
> > And yet I'm able to ssh from a machine on the local network to the
> > router via the external IP address.  Does the router still know that
> > I'm coming from the inside and thus allow it
>
> Of course -- would you really want to use a firewall that was so easily
> outwitted?

Ok, sounds like no cause for alarm.

> > Also a bittorrent client works on 192.168.0.3 even though I'm
> > forwarding a different port than the one the client is set to listen
> > on.  How can that be?
> >
>
> While I don't use bittorrent, myself, IIRC the client will somewhat work
> with incoming connections blocked.

But how can it possibly do that?

- Grant

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