I have a need to source NAT a range of addresses on a one to one basis on a Cisco ASA5510, but the firewall has no association (interfaces) with the range of addresses that source NAT is to be applied and I only want to apply this translation when the original source addresses browse to a specific public address.
To try an explain further I will use the private address 192.168.100.100 as the destination public address.
Internal host 10.10.10.10/24 browses to public address 192.168.100.100 via asa 5510 firewall.
The asa 5510 has an inside address 10.20.20.1/30 and an outside address 10.30.30.1/30.
When internal host browses to public address 192.168.100.100, the 5510 uses source address translation and changes the 10.10.10.10 address to 10.40.40.10.
Another internal host 10.10.10.11/24 browses to the same public address 192.168.100.100 via the asa 5510 firewall as above scenario, but this time the 5510 (still using source address translation) translates to address 10.40.40.11 and so on (ie on a one to one source translation basis).
Is this possible and if so please could you provide me with an example configuration.