On Mon, 2005-02-21 at 14:24 +0100, Thomas wrote:
> Hey,
> 
> I've got two Postfix servers in my lan:
> 
> server1 has IP 192.168.1.101
> server2 has IP 192.168.1.102
> 
> Both servers are sitting behind a m0n0wall router with two WAN 
> interfaces. Emails designated for WAN1 is NAT'ed to server1 and email 
> designated to WAN2 is NAT'ed to server2.
> 
> This works like a charm - until server1 tries to send an email to 
> server2, or vice-versa. I can see in my logs that server1 obtains the 
> correct WAN IP for server2, but it is refused (by m0n0wall?) to connect.
> 
> Now the optimal solution would be to create a hosts file on each server, 
> telling them which domains are local, but seeing as I've had no luck 
> getting Postfix to read this hosts file, I'll settle for the next best: 
> opening up my m0n0wall for such a connection.
> 
> But how to do it? I simply have NO idea as to how I can create such a 
> firewall/NAT configuration.
> 
> If some kind soul could help me out, I would really appreciate it.
> 
> Thank you,
> Thomas
> 
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You need to configure some sort of split-horizon dns as you mention for
this to work with m0n0 since it does not currently support accessing
NATed services from the lan.

See http://m0n0.ch/wall/docbook/faq-lannat.html for more info, and
search this list for workarounds/solutions..


--
Thomas Kolstø <thomas at kolsto dot no>