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Reverse Lookup Failing

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by pcammuso

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We as a company manage our own DNS servers, Our reverse DNS lookups are failing from remote sites. We can do successful reverse lookups when we are on our own name servers, however they fail from everywhere else. We are stumped. Everything looks right and act correctly when we test locally, but fails externally. This is just Reverse DNS that is failing.

4 replies

by greybeard770

We went through this with e-mail being refused by some sites. Even though you are the SOA for your domain names, it is likely that your ISP is the SOA for your IP addresses. Take a minute to think about the difference. Your ISP doesn't care what domain names you use. But they own the IP addresses they allocate to you. You need to contact them to either allow you to be the SOA for the address or have them enter the PRT record on their server.

by pcammuso

This wasn't the solution, but it pointed me to the right area. My internet provider had incorrect pointers to our managed DNS servers. As soon as we altered them and they propagared, RDNS started working. Thanks for the help

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