Helge Oldach wrote:
> 
> All,
> 
> I wonder whether there are plans to complete implementation of the
> "strong ES" model as described in RFC 1122 for multihoming hosts on
> FreeBSD. Essentially this would assure that a multihomed host would
> send and receive IP packets through the "correct" interface (that is,
> the physical interface that is configured with the IP address used in
> the packets).
> 
> Currently the incoming part is already present through the
> net.inet.ip.check_interface sysctl. If enabled, this would drop packets
> which arrive on an interface with a different IP address than the one of
> the interface.
> 
> But what about the sending side? This appears to be missing. We would
> need to forward packets not according to the routing table, but
> according to the source address of the packet (if already defined,
> otherwise it would be defined through the routing table first).

This is also called policy routing.

> Is anybody aware of this issue? I personally consider this as beneficial
> for firewall-type setups. Are there plans to implement it?

Claudio and I are (somewhat slower than expected) working on it. We
into detail there once we have completet the new natd (release
candidate available) and the TCP hostcache (80% done).

-- 
Andre

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