Reverse DNS for my IP address is returning SERVFAIL

The reverse DNS for my IP address (in the 71.238.123.0/24 block) is returning SERVFAIL. This is not a request for a custom PTR record, I understand those aren't offered on residential accounts. The issue is that the existing reverse zone is answering inconsistently.

`dig -x <ipaddress> @8.8.8.8` returns status: SERVFAIL, while the same command against @1.1.1.1 returns status: NOERROR. Additionally, a network admin at a site I routinely connect to independently also sees status: SERVFAIL from their own resolver.

This has made fresh ssh connections for work take roughly 30 seconds longer than they should, a problem that only began when I got my new router, so I believe that I'm on a new IP whose reverse zone is broken.

I'm happy to provide the exact IP address privately.

Responses

Oldest First

Selected Oldest First

XfinityJeniece

Official Employee

•

4.3K Messages

8 hours ago

Hey there, @dns_woes, thanks for reaching out through Xfinity Forums regarding your DNS issues. We would be happy to take a look at this issue on our end and help with troubleshooting. Please send us a Direct Message with your full name and your full address.

How to Send Us a Direct Message:

Click “Sign In” if necessary.
Click the “Direct Messaging” icon.
Click the “Start new conversation” (pencil and paper) icon.
In the “To:” line, type “Xfinity Support.”
As you type, a drop-down list will appear. Select “Xfinity Support” from that list.
An “Xfinity Support” graphic will replace the “To:” line.
Type your message in the text area near the bottom of the window.
Press Enter to send it.

You can see how to send us a direct message here, https://forums.xfinity.com/conversations/guidelines/how-to-direct-messaging-within-the-forum/697ba1e570934d009185c514.

0

Customer Service

dns_woes

Reverse DNS for my IP address is returning SERVFAIL

XfinityJeniece

New to the Community?