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Thread: DSL line as secondary MX

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    Spencer is offline Senior Member
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    Default DSL line as secondary MX

    How would I go about using a DSL line as a backup MX? So if our T1's would go down mail would get delivered through our DSL. We have static IP's on the DSL.

    Thanks,

    Spencer

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    Is your ZCS server on a private IP or behind a firewall ? To be honest I would be more inclined to use a third party service for secondary MX and have that forwarding down your DSL line. That way if your ZCS server dies that scenario is covered aswell

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    Its on a private net. I do plan on having a backup MX hosting somewhere else, but in the last year we have had more T1 outages than server downtime. Which was 0, except for planned maintenance. I already have the DSL why not utilize it.

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    Okay, so add a secondary MX with your DSL IP and route that to your ZCS server just the same as you do with your T1. Are you using NAT/PAT on the firewall ?

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    That's what I was thinking, but wouldn't there be routing issues on the outgoing packets? They come in from the DSL and go out through the TI's. But since it failed over because the T1's are down, would the packets get dropped?

    Maybe I am just thinking too much into this.

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    They shouldn't do as the FW will keep a table of the translations anyway.

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    Spencer is offline Senior Member
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    Our DSL is on a second router. So I am not sure how that would work.

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    Well you could always pop a basic MTA on the line and let it perform a store/forward type of solution.

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    Also, I thought I might ask my ISP if we can do BGP on the routers. That would solve all the issues.

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    Nice Can you not do HSRP between your two devices ?

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