Assessment failed: Unable to connect to the server

I am unable to get HTTPS port beyond the internal firewall, I tried couple of configuration but failed and I had to change it back to original setting.

This is a new installation, websites and email working ok.

I intentionally removed the domain name, but I am thinking this command is blocking HTTPS. My port on the router is open and accepting all other request. 443 is also running on the server when I checked it, just can't get HTTPS external seems to be blocked some how can someone help with this.

vhosts-ssl.conf
   SSLEngine on
   SSLCipherSuite ALL:!ADH:+HIGH:+MEDIUM:-LOW:-SSLv2:-EXP
   SSLProtocol All -SSLv2 -SSLv3
   SSLCertificateFile /etc/pki/tls/certs/domain.com.cert
   SSLCertificateKeyFile /etc/pki/tls/private/domain.com.key
   SSLCertificateChainFile /etc/pki/tls/certs/domain.com.bundle
   SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown

Thanks in advance.

what is output of

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ss -nlp | grep 443
Also did you check your server firewall it its blocking it?