Named stop working if i change default ssl certificate for services

SYSTEM INFORMATION
OS type and version 2.520
Webmin version Ubuntu Linux 24.04.3

If i change default SSL certificate for services, NAMED stops working and refuses connection

any DNS querey result as :
127.0.0.1
127..0.01:53 SERVFAIL

after i put with virtualmin again the previous SSL certificates (created when installed) to be default everything keeps working again.

named-chekconfig does not find any error in configurations files

What do you mean by “services”? Can you supply a screen shot of where you are changing it?

i found the problem and fixed but i think is a virtualmin bug.
when i set the certifictes for services in BIND server there are added options:

  1. named.conf is added the tls certificate directive
  2. in named.conf.options are added directive to use certificate and listen to port 853??

after removing those directives named started to work and reply to requests normally.

So probably the problem is the port 853 ??

Regards