for now I don't have complete information, but I would like so get some suggestions.
Costumer has single LAN subnet and two internet connections with two fixed IP addresses.
A couple of servers (5-10) uses Cisco ASA as gateway connected to first internet connection.
All other computers are configured via DHCP to use ISA server as gateway connected to second internet connection.
Now they want to retire ISA server and connect everything to Cisco ASA, but they want to maintain the same traffic flow - Servers should use first internet connection, client computers the second.
On both internet connections there are configured a couple of port forwardings.
Any suggestions about how the Cisco should be configured. One idea is to use additional two lan ports configured with IP addresses of ISA server. So Cisco would have two public IP addr. (different subnet) and two LAN IP addr. (same subnet), two NATs, ...