Hello,
I currently have a Shorewall firewall running in my network connected to 5mbps
ethernet. I need to set up another DSL connection as a backup in case the
ethernet goes down so my users can get to a web based application. I have
done multi-isp with Shorewall before with great success. However for this
setup I want a separate firewall for the DSL connection so that the primary
firewall is not a single point of failure for the terminal server application.
I therefore configured a system with OpenWRT and am using shorewall-lite on it.
I will have two dns entries for this, so it's a poor mans failover solution.
I have the OpenWRT system working, but there is one issue to hammer out. My
main or primary firewall is the default gateway for all my systems. This is
something I don't want to change. I am trying to do reverse masq so that I can
leave my setup my gateway as is on my systems in the internal network. I
recall doing this years ago with Shorewall but cannot remember how I
accomplished it.
Does anyone have any idea how this might be done? I thought it might be with
source nat but after reading the documentation and trying a few things I have
not been able to make it work.
Thanks in advance,Simon
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