Debian Buster - ISPConfig 3.1.15p3 I installed my digital certificate on the server but when opening the main page it still appears about security risk issues: SEC_ERROR_UNKNOWN_ISSUER Someone with the same problem ?
Then you either did not put the ssl cert into the right files or you missed adding the chain certificates into the cry file. The files in which you must exchange the cert are in /usr/local/ispconfig/interface/ssl/ Do not use other file names, just exchange the file content of the ssl crt and key file.
I think it worked by changing the contents of the files: ispserver.crt ispserver.key For my certficates. But I had to comment on apache: SSLCACertificateFile /usr/local/ispconfig/interface/ssl/ispserver.bundle This file does not exist. Thanks again for everyone's help.