configure Interface on Cisco ASA 5505

I have assign x.x.x.120 to e0/1 as outside interface. I need to use different pubic IP address for setup Nat for exchange server like x.x.x.121 . I wonder if I need assign this IP address to e0/2 or I just need to add a IP address as a object.

When I try to assign this IP address to e0/2 , I am getting overlap error.

Please advise.
GolchehrAsked:
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Pete LongTechnical ConsultantCommented:
No, you just set up the nat, and the firewall will 'proxy arp' it outside of the existing outside interface (e0).

This is how to do it

Add a Static (One to One) NAT Translation to a Cisco ASA 5500 Firewall



PL
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