I initially configured DNS settings using BunnyDNS. A day later, I set up a VPS and installed CyberPanel. This means DNS propagation was complete before CyberPanel installation.
However, a day after completing the CyberPanel setup wizard, I encountered a warning:
Looks like something is wrong with your initial setup, please double check on Setup Wizard.
Additionally, the CyberPanel main log file shows the following error:
[12.19.2024_00-00-29] Domain that you have provided is not configured as rDNS for your server IP. [404]
I verified the SSL status using OpenSSL commands, and the results were as follows (hostname example: sub.domain.tld):
sudo openssl s_client -connect sub.domain.tld:443
sudo openssl s_client -connect sub.domain.tld:587 -starttls smtp
sudo openssl s_client -connect sub.domain.tld:993 -starttls imap
sudo openssl s_client -connect sub.domain.tld:995 -starttls pop3
The SSL for HTTP and the mail server (port 587) is configured correctly, but IMAP (993) and POP3 (995) did not return anything.
I also checked the resolv.conf file and confirmed that the DNS resolver is set up correctly. The PTR record for rDNS is properly configured as well. To verify, I ran the following command with my IP:
dig -x <IP_address>
Despite these checks, the warning Looks like something is wrong with your initial setup, please double check on Setup Wizard. persists.
Server Details:
OS: Ubuntu 22.04.5 LTS
Web Server: OpenLiteSpeed 1.8.2
Control Panel: CyberPanel 2.3 (Build: 9; Commit: 6f28d39a591b5e08aac6adfcc59b642a58622ea2)
CyberPanel Main Error Log File
[12.21.2024_00-00-23] Domain that you have provided is not configured as rDNS for your server IP. [404]
Why this warning pops up?