Will the box be doing NAT for clients on the inside? You'll pretty much have to or you'd need to change you IP's on each machine when one connection failed. Use the IP-masq howto and build your rc.firewall file. Build a rc.firewall2 file with information to your other internet connection in it. Write a perl script, or even a shell script that pings your first hop after your DSL router or cable modem. If the pings fail for 10 seconds, make the script run "ipchains -F" and then run rc.firewall2. You'll probably want to add code to switch it back over if your other connection comes back if that is your preferred connection. Shouldn't be too hard. Jay > -----Original Message----- > From: Mike Nielsen [mailto:mike at getbent.net] > Sent: Saturday, January 06, 2001 1:37 PM > To: tclug-list at lists.real-time.com > Subject: [TCLUG] Failover router > > > > I'm looking for a collection of tools that I can use to turn > a linux box into > a failover router. > > Basically I want a setup that is able to take two high speed > connections, > Etiehr DSL, cable, T1, ISDN whatever and make a determination > as to which > is currently working and route traffic to it. > > The ideal scenario would be if the primary connection dies to allow > connections to the servers via the other connection without having > to reconfigure anything. > > Has anyone tried this before? > > -- > > > ----------------------------- > |\/|ike at GetBent.net > _______________________________________________ > tclug-list mailing list > tclug-list at mn-linux.org > https://mailman.mn-linux.org/mailman/listinfo/tclug-list >