01-08-2008 06:30 AM - edited 03-11-2019 04:45 AM
I have setup an ASA cluster to use Redundant ISP Links as show in the cisco example
This works fine for outbound traffic, i.e. web browsing. However I would like to use it for inbound as well, connecting to a SMTP server. As I understand it there cannot be two static mappings to the same IP address, from the two ISP CIDR ranges. If I place a second IP address on the SMTP server to allow two mappings I cannot determine which address will be used as the source IP for outbound traffic. I believe this will screw up the connection.
Any ideas, assitance appreciated.
01-10-2008 02:13 AM
Policy-Based NAT seems to be the answer.
http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a00807d2874.shtml
01-20-2008 10:41 AM
Hi, you need a service called DNS failover, if your primary link is down, your server will be resolved the secondary IP from the other ISP. Here's an exmple ...
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