Thanks for reading this post. I'm trying to configure a 2610 (with 2 possible connection paths to the Internet, a primary T1 and a secondary DSL) to allow inbound and outbound traffic to/from an internal mail server. I understand the floating static route concept for outbound traffic, however the WAN address of the mail server is set to a public IP address associated with the T1 IP block. The MX record is set-up with 2 weighted IP addresses, T1 as primary and DSL as secondary if T1 goes down. My problem is getting inbound traffic to the mail server in the event that the T1 does go down. The DSL has it's own public IP address(es) which I don't know how to route to the mail server address. The mail server is incapable of multiple (secondary) addresses. BGP is not an option, though I know it would be a solution.
T1(S0) DSL(e1)
|_________2610____________|
|e0
|
mail server
e0 12.x.x.1 /28
e1 65.x.x.2 /29
Mail server 12.x.x.2 /28
How can I make the 12.x.x.2 address reachable from the outside if the T1 should die?
T1(S0) DSL(e1)
|_________2610____________|
|e0
|
mail server
e0 12.x.x.1 /28
e1 65.x.x.2 /29
Mail server 12.x.x.2 /28
How can I make the 12.x.x.2 address reachable from the outside if the T1 should die?