Issue Sites are repeatedly inaccessible even after repair

[camthor]

Server operating system version

Debian 11

Plesk version and microupdate number

18.0.70 #4

After an automatic update to 18.0.70 Update 2 all sites were inaccessible. We managed to recover them with plesk repair dns, particularly "Restore the user DNS configuration file from the template? [Y/n] Restoring the user DNS configuration file" seems to have helped.

Now, however, it happened again several times after hours that all sites are unreachable and we have to do the repair again. It seems that we still have a wrong configuration or something is missing. After the first incident we had some trouble with Debian, did a distro upgrade, lost some components of Plesk and reinstalled Plesk. So it is possible that some required components or packages are missing. We've done plesk repair for fs, web and installation.

Any idea what to do? Thanks!

 

[camthor]

Update: After the update to 18.0.70 #4 even plesk repair dns doesn't seem to help. Sites remain offline.

 

[camthor]

I changed now the DNS settings, disabling the local DNS service, which brought the sites back. Keeping fingers crossed ...

 

[Sebahat.hadzhi]

Hello, @camthor . It will help to know what's the exact error returned by the websites in order to attempt to further guide you on how to find more details about what the issue could have been.