I'm banging my head against the wall to come up with a clever and simple solution to WAN failover. This is for a SOHO installation with two different external IPs. Only outbound connection failover needed.
- Provider 1: Cable
- Provider 2: Wireless
The Firewall is a Debian GNU/Linux, so the solution should use Linux and be software-based.
I want to be able to not only detect, if one of the routers go down (thats easy with iproute2), but when their connections go down. Both routers dont have SNMP or some other standards based RMON.
Is there something like a ping utility where I can specify the default route to use?
That way I could monitor both links optimally with a small script. Or should I go some other route?