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Same PTR on another IP?


I am looking to install a seperate WAN for my client, for the purpose of failover. Firewall is a FortiGate 50B.

My question is, can I set up their current PTR for mail on the primary line, onto the second line also, so when failover occurs that part still matches?

My plan is to introduce the new WAN and:

1. Set the Static Route for the new line on a higher priority than the first
2. Copy all outbound/inbound firewall rules for WAN2

Then as far as I can see it's just the Mail side I need to do, i.e the PTR record.
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2 Solutions
Kruno DžoićSystem EngineerCommented:
For email, set 2 MX records for both IP address with different preference as 10 for main line and 20 for backup.
yes you can set ptr record to also point second ip address, but you should also create dns mx records for both ip addresses
hongeditAuthor Commented:
Yes that is not a problem, I was planning to do that anyway.

My concern is outbound - they have had a lot of issues in the past with their ISP who took ages to get their PTR record right, and subsequently recipients thay checked for RDNS bounced their emails.

So can I have 2 identical PTR records on different WAN IP's? They will be on different ISP's if that makes any difference (I suspect not)
yes you can define any number of identical ptr records pointing to different ip addresses

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