Multiroute question

[Nikolay Denev]

On Sep 20, 2012, at 5:16 PM, Juan José Sánchez Mesa <juanjo.listas at doblej.net> wrote:

> Hi!
> 
> (sorry for my bad english)
> 
> I have a FreeBSD machine (8.2-RELEASE-p3). The machine has two ethernet cards, configured in this way:
> 
> - Card A: internet IP address
> - Card B: intranet IP address
> 
> Default route goes via card A.
> 
> Now, on the intranet I have a "normal" DSL router. Then, using NAT i've forewarded a simple port from the DSL to the intranet IP of this machine.
> 
> The incoming packets from the DSL comes ok to the machine (via card B), but the outgoing packet goes to card A, due to the default route.
> 
> There is a way to configure the network so that outgoing packets goes to the card from where the incoming packets was arrived ?
> 
> Or is this impossible to configure ?
> 
> Thanks!!!
> 
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Hi,

You will probably need the pf(4) firewall configured with the "reply-to" keyword for this to work.
Something like :

  pass in on $CARD_B reply-to ($CARD_B, $CARD_B_GW) from any to any

Regards,
Nikolay Denev