I have not yet experienced any DNS failures due to a missing PTR record, but am wondering:
Is there any added value in having a valid PTR record on a nameserver IP-address?
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There shouldn't be any real functional issues due to a missing PTR record for a DNS server. It may come in handy if you're dubugging network problems, but even then, I would think it would have limited usefulness. |
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It's extremely important if you are running a mail server. Otherwise, it's not important (IMHO). Why? Many spam filters consider a missing PTR record as highly indicative that you are a spammer. |
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Being able to look up IP's and get a name back seems to have value to me. Troubleshooting errors with only IPs could get tedious. |
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The PTR record is a must have for all Mail Servers that directly relay mails to the Internet failing which many DNS Blacklist will outright reject mails originating from the I.P Address and it could get your I.P Addresses blacklisted globally and many of the DNS Blacklists are globally replicated depending on the Blacklist. |
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It also depends on the domains you are serving with the Public DNS server. Some TLDs require a Nameserver to be "Registered" with the TLD Registry before it can be used with their domains. This is not the case with COM/NET, but some others do require it. I believe there must be a matching PTR record when you go to register the Nameserver |
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