One Cisco ASA with 2 Active ISP inbound connection for Mail Server

Posted on 2012-08-26
Last Modified: 2012-11-12
We have two different internet ISPs connected to one Cisco ASA Firewall (8.3).  I would like to allow inbound traffic from two public  IP address, one from ISP1 and other from ISP2, to the same MX server on dmz. We need receive email on both two public ips for MX load balance.  We not want to configure ASA Dual ISP failover. We need to have the two ISP working actively.

Question by:MarcosMeneses
    LVL 16

    Expert Comment

    by:Michael Ortega (Internetwerx, Inc.)
    You cannot do what you are trying to with an ASA. You would want a Cisco Router (ISR) instead.

    LVL 16

    Accepted Solution

    About the only failover function you can get from an ASA with 2 ISP's is ISP fallback. That would require at least 1 ASA 5510 with the Security bundle. Of course that just addresses auto failover outbound traffic through. It will not do what you want.

    Again, my recommendation is using a router instead of a firewall.


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