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Mail Server and NATing

RStokes
Hi All!

So, I have a mail server on the DMZ, and the UTM220 device connected to 2 ISPs, with each ISP I have a chunk of 13 or so usable's.

At the moment, the mail server will send emails out, and the outgoing IP (visible by the receiver) will be the IP of the UTM.

However I would like it that the server use a specific IP. I (think) I managed to achieve this by using an SNAT rule:


Traffic selector:  Mail Server →  Any →  Any 
 
Source translation:  WAN Go [Alias-36] (Address) 
 
I guess that is doing the job, as when I google 'what is my IP', it comes as the correct IP.

HOWEVER, if this ISP fails, how do I tell it to use a specific IP on the other ISP????? That is the Million Dollar question! [:S][:S][:S]


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