How to reverse a DNS?

How to reverse a DNS?

It would better to use a standard DNS server such as bind or dnsmasq. If you use OpenDNS (or other) DNS, you'll have to edit your hosts file to provide the IP addresses for those hosts that you want to resolve through OpenDNS.

If you use a DNS server that supports dynamic updates (such as dnsmasq), you can add in an additional line to tell dnsmasq to "re-write" those records (note that it will not overwrite your existing records). So for example, if you have your existing zone file named myzone.txt @ IN SOA ns.

What is my reverse DNS lookup?

If you have a domain registered at 123-reg.

Co.uk and wish to know the IP address of the service, whois 123-reg.uk will give you that information. It is often useful to include the -l flag so that only the local ip is listed, in order to identify what is used internally and not what is available to the public.

I do not have a reverse DNS entry. It might be possible that your domain is being forwarded to another machine, in which case you would have no control over the records. You can contact your registrar to check if this is the case.

Your registrar may not have setup a reverse DNS for the zone. I do have a reverse DNS, but it is not set. There are two possible reasons why this might be the case. The first is that your DNS has been blacklisted by a registrar, the second is that your DNS has not been propagated.

If your DNS is blacklisted then there is nothing you can do about this. To find out if your DNS has been blacklisted, simply run whois 123-reg. If it returns "blacklisted", you will know that the name is blacklisted. If this is the case, you should contact your registrar and request that they remove the blacklisted entry.

If you are unsure about the status of your DNS, you can ask your registrar to try and propagate your DNS. Your registrar will either be able to tell you, or if they cannot, they should be able to tell you.

I do have a reverse DNS, but the answer is unknown. Sometimes your registrar might not have the information about your reverse DNS record, although they should be able to tell you the status of your DNS. If your registrar cannot tell you what the status of your DNS is, then contact them and ask them to investigate the situation. This could be an internal error, or a problem with your reverse DNS.

You might also want to double check that your reverse DNS information is set. I do not have a reverse DNS but my registrar does. If you know your domain was registered with another registrar, you will need to contact them to find out what happened.