I'm using a Ubuntu Server sharing the internet connection to my network.

Currently I have two WANs. A DSL connection connected to eth1 (configured as ppp0) and a cable connection plugged into eth2.

And only eth1 is being shared over eth0 (the local network). What I want to do:

- Some services I want to go only by the secondary WAN (eth2). On that case, forward specific ports to it.

- Failover. If ppp0 fails, goes to eth2.

- Some IPs from our internal network will ALWAYS use internet via eth2.

Is it possible to do using Ubuntu/IPTables? I already did it before using pfSense, but don't know even how to start doing it on Ubuntu.

Thanks,
J.

Did you have a look at this site:http://lartc.org/howto/lartc.rpdb.multiple-links.html

This is about the dual wan, but you need to "play" with iptables to use different applications on different port.