Martin Turgeon wrote:
I've been reading the mailing list for a while, but it's my first post. I'm
not sure what is causing the problem so I'm posting to multiple lists. I'm
running FreeBSD 6.1 on a Celeron 2.8GHz with 512Mo of RAM. It looks likes
after a while (a couple of weeks) the routing isn't working anymore, but
only with the external interface (the one connected to my cable modem from
Videotron in Montreal). The box is acting as the gateway of the network with
PF, OpenVPN 2.0.5-1 and ISC-DHCPd 3.0.3-1 running. The problem also occurred
on FreeBSD 6.0 on another box.
Is your external ip configured with dhcp? I would guess this is because
your ip on the external interface changes. Your NAT rules will still go
to the old ip and hence nowhere. If reloading your pf ruleset solves the
problem, then this is a strong indication.
There is some trick to handle that, IIRC something like this would do:
ext_if=fxp0 # external interface
nat on $ext_if from <lan> to !<lan> -> ($ext_if)
The () means that pf will lookup the ip on that interface, and update
dynamically when the ip changes.
Well, that's how I remember it, I couldn't find where I've seen it, but
there is a trick like this.
Cheers, Erik
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