Re: Dual WAN

["Brian Seklecki (Mobile)" <lavalamp%probikesllc.com@localhost>]

If you don't need NAT, you can use standard routing tables to specify 
outbound interfaces on a per-destination basis.

For more granulatity, or to use NAT, use PF to map on a per-L3/L4 
protocol, in combination with supernet routing.

For example, if 10.0.0.0/8 is the corp network behind the VPN router, 
you'd have:

route add 0.0.0.0 0.0.0.0 172.16.1.254
route add 10.0.0.0 255.0.0.0 10.5.4.1

If your ISP is filtering some protocol (SMTP), but your corp network 
forwards it fine, ou'll have to use NAT or policy route statements to push 
it on a per-UDP/TCP port basis

~BAS