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2920 - Dual Wan for Mail Server resiliency.

  • spudster
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11 Jul 2013 13:14 #76946 by spudster
Hi All,

We recently had some issues with our ISP that caused our email to be down for a whole business day. I have had a second link put in and would like to setup some resiliency.

Now I have updated our domains MX records so that
x.x.x.1 is 10 (original line)
x.x.x.2 is 20 (new line)

So effectively, if ISP 1 has issues again mail will be redirected inbound via ISP/Link 2.

I have opened ports 25 on both WAN1 and WAN2.

My question is regarding load-balancing essentially. If the incoming connection comes from WAN1, will the draytek always respond down WAN1? I wouldn't wan't the remote server to get confused if the wrong IP responds to it.

Thanks in advance.

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13 Jul 2013 18:12 #76961 by voodle
when I've used dual WAN setups with these routers, they've always only responded on the WAN interface that the session came in on so I don't think that should be a problem :)

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