From: "Dennis Zografos" <admirald at gmail dot com>
> Diagram (also attached):
> I have both a nice internet connection and a corporate intranet
> connection that also has access to the internet. I would like the LAN
> to be able to access both but ONLY access the internet over the good
> internet connection (on WAN), NOT the crappy-speed internet hooked
> onto the intranet (OPT1).
That is the only way it will work. The opt1 interface will have no gateway,
and will not go beyond the subnet. If you have other subnets on the
"intranet" you will need to add them with static routes. You may also want
to point your DNS forwarder to a DNS on the intranet if you need it.