CenturyLink + Reverse DNS
If you have CenturyLink’s residential service, have leased static IPs, and are struggling to configure reverse DNS, hopefully this post can save you some time.
You’ve probably found CenturyLink’s static IP tool. You’ve clicked the Reverse link, but you keep seeing this error:
Sorry. We could not retrieve your DNS records. Please try again later.
Technical support can help, but there are some pitfalls.
Here’s what you do:
Call CenturyLink’s technical support line at 800-247-7285. Call during regular working hours; the late staff has less access to internal tools.
When asked for your account number, don’t enter it. When asked if this is business or residential, say business.
Residential tech support can’t help you. They’re not trained on reverse DNS and don’t have access to the tools to configure it.
When you get to a person, explain that you’re a residential customer but need help with static IP issues and the residential folks pointed you this way.
Tell them you need to configure reverse DNS for your static IP. This is a rare request for them, but most agents I spoke with knew what I was talking about.
They’ll ask you for the IP and what it should point to, but here’s the other problem — their internal tool has a bug, too.
Their internal tool doesn’t automatically turn your desired domain name into a FQDN with trailing period, and it won’t accept a trailing period, either.
If your IP is
220.127.116.11and you ask them to map that to
server.example.com, you’ll find that your IP will soon resolve to
server.example.com.3.2.1.in-addr.arpa. No good.
If you ask them to add a trailing period to the end to make it a FQDN (e.g.
server.example.com.), their system will not accept it.
The tech support rep will have to get help from someone else via their “assist queue”. I was told this is a separate group with access to different tools.
The rep helping on the “assist queue” will hit the same roadblock themselves. They won’t be able to add a trailing period to make it a FQDN.
The “assist queue” rep can file a ticket with the “server guys” (as I was told) to finally get the reverse DNS entry added. I heard it could take 24-48 hours, but I saw turnaound in just 2 hours.
This was painful and took ~ 3 hours on the phone over several days. But, being able to lease a block of static IPs on residential service is pretty cool. I can’t believe they even sell this.