We have an ASA 5510 firewall. There are 4 ports on it configured as 2 outside, one inside, and one DMZ. We have two cable modems attached to the outside ports. Our plan is to have the "inside" port directed to one outside port/cable modem, and the DMZ port directed to the other outside port/cable modem.
We have been able to get the "inside-to-outside" setup to work but not the "DMZ-to-outside" setup (at least at the same time).
First off, is this possible? If so, what are we likely missing - some way to have a second default route for the DMZ?
(My manager is the "Cisco person" here, not me, so I may not have enough info. All help is appreciated.)