I am planning to use a ASA 5510 for the following scenario:
1) two security-zones: one for office, one for exposed services such as mail-relay etc. (dmz)
2) one leased line/frame-relay routed via CISCO 2600 is connected to the outside interface of ASA; from within the dmz a set of private IPs will be NATed to official IPs
This already works fine, if the default route is set to the CISCO router (172.20.78.1) - so I can access a web-server inside the dmz from outside
3) Another ADSL-line (dynamic IP) should be used for normal browsing from office security-zone.
Interface PAT is working fine, if the default gateway is set to the ADSL-router (172.16.3.1).
My questions is now, how can I get both working? Meaning using ADSL from the office-zone and leased-line for dmz/exposed services?