DNS Server is not working properly.

Operating System & Version
Cloud Linux 7.9
cPanel & WHM Version
102.0.4

hmaddy

Well-Known Member
May 6, 2020
347
39
28
Chennai
cPanel Access Level
Root Administrator
Domain dns management system is not working properly. All the domains are not propagating properly. When we change to Cloudflare, it will work correctly. On our server its not working. All the entries are correct. but i dont know whats happening and how it can solve. its happening only on hetzner servers.

is it any resolver issue on hetzner sever.
 

hmaddy

Well-Known Member
May 6, 2020
347
39
28
Chennai
cPanel Access Level
Root Administrator
when dig A domain its showing correct IP and when check with leafdns and intodns its showing old ip. How to solve it
 

cPanelWilliam

Administrator
Staff member
Mar 13, 2018
161
23
93
Houston
cPanel Access Level
Root Administrator
Hello! You mentioned that the domains show the 'old' IP on leafdns and intodns. Is it only the domain's A record that is showing the old IP, or are the nameservers showing the old IP as well? Initially, you stated the domains are not propagating. Did you recently perform a server migration, and the domains are still incorrectly resolving to the old server?
 

hmaddy

Well-Known Member
May 6, 2020
347
39
28
Chennai
cPanel Access Level
Root Administrator
recently we migrated the server to new server. after that we changed the name server ips with new one. After that all these issues happened. most of the websites are down in many locations. so we checked the dns settings like A records. All are correct and when we check on leafdns and intodns, its also showing the old server ip.
 

cPanelWilliam

Administrator
Staff member
Mar 13, 2018
161
23
93
Houston
cPanel Access Level
Root Administrator
Hi, did you already ensure the nameservers IP's were updated at both the domain registrar and within the DNS zones on the server? Additionally, if many of the websites are down, it could mean that port 53 TCP/UDP is blocked on the Hetzner server, as that would prevent domains from resolving.

If you've already checked both of these things, I'd suggest opening a ticket so our team can take a closer look. There are many moving parts when it comes to troubleshooting DNS, so having access to the server can significantly help determine the cause of the problem.
 

keatonhj

Registered
Dec 10, 2022
1
1
0
Australia
cPanel Access Level
Website Owner
Broken. A Records show new IP's in DNS Zones editor.
It is NOT propagating to DNS servers.
When I try to edit the zones I get the error (The "serial" argument cannot be empty. )

This is a monumental clusterf*ck to an extent I've never seen before. It's such a high priority bug to fix as it completely breaks websites.
Should I completely abandon CPanel or are you guys urgently fixing it?
 
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cPRex

Jurassic Moderator
Staff member
Oct 19, 2014
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@keatonhj - can you please get me more details on the situation you're seeing? If you aren't able to edit the zones through WHM, can you run this command against the zone file to see if you get more details?

Code:
named-checkzone domain.com /var/named/domain.com.db
Just change both "domain.com" entries to the specific zone file you're working with.