pmok at optushome dot com dot au wrote:

>M0n0Wall 1 => 192.168.0.10
>M0n0Wall 2 => 192.168.0.20
>
>Client PCs => 192.168.0.xx
>Where xx = from 30 to whatever.
>
>Depending on which ISP I want to connect
>to on each client, I manually set DNS, Gateway, and
>IP address.
>
>Interestingly, I can receive emails from one ISP while
>connected to the other. Say if I connect to ISP 1, I can
>receive email from my email account from ISP 2, but can't
>send.
>  
>

There is a bit of a back you can use to get mail working regardless of
which default gateway you happen to be used.  On the .20 m0n0wall, add a
routing table entry to redirect all traffic to the other ISP to
192.168.0.10.

m0n0wall will redirect the traffic, and send an ICMP type-5 packet back
to tell the client that from now on, direct traffic to that IP to
192.168.0.10 instead.

I use this technique to move some types of traffic from my primary
m0n0wall box to a secondary ADSL line (which is normally idle -- It's
just a backup connection -- I figure I may as well use it for high
bandwidth, low priority stuff in the mean time)

-- 
If I were still loyal to the Goa'uld, you would know it.
It would be immediately apparent as I would not hesitate to kill you 
where you sit.
  -- Teal'c