Reverse DNS (rDNS) questions

Hi there;

I had a couple questions which are probably pretty basic for most of you here.

What should the PTR record point to?

Let's say I have 3 IPs
192.168.1.1
192.168.1.2
192.168.1.3

I also have a main domain, two nameservers, and other domains hosted on the same box.

ns1.domain.com -> 192.168.1.1
ns2.domain.com -> 192.168.1.2
all domains -> 192.168.3

What do I want the PTR to be?

Am I looking to have the PTR resolve to the domain name of the nameservers, or the mail servers?

And let's say that I have multiple domains, each running their own mailserver. If they share an IP they obviously can't have their own rDNS. Will this cause a problem?

I apologise if this got confusing.

Thanks,

Cam

 

 

 

 

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