Hi,

I'm looking to setup a box mainly as a routing decision maker.
I'll have 2 DSL lines, a primary and backup (to 2 different ISP's).  I'd
like traffic to go out the primary (faster and static IP's) when its up
and have it automatically failover to the second DSL router when the first
dies.  I have a LAN -> watchguard -> linux box -> 2 DSL connections.

Actually, the linux box and the 2 DSL lines are on the same physical
network.  I'd setup the linux box with static routes to force pings
through each of the DSL lines and when it notices one line down to force
the default route through the backup.

The trick I'm finding is getting it to forward packets from the watchguard
back out the same interface to one of the DSL lines.  I can't seem to get
it to work like a router when there's only a single ethernet interface.

I'm looking to make a transparent failover (and recovery) between the
DSL lines.  The watchguard can only take a single IP address for its
default internet connection.

Any help would be appreciated...

Thanks,

Brian




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