- Plesk for Linux
Domains assigned to 203.0.113.2 IP address or Plesk panel over the port 8443 cannot by opened via HTTPS (https://example.com/ or https://203.0.113.2:8443) with the following error in browser:
PLESK_INFO: This site can’t be reached
www.example.com unexpectedly closed the connection.
That domains can be opened via HTTP without any issues (or Plesk may be opened over the 8880 port).
example2.com is set as Default site at Tools & Settings > IP Addresses > 203.0.113.2
SSL/TLS support is enabled for the domain at Domains > example2.com > Hosting Settings, but there is no certificate set. Or invalid certificate is selected.
Checking connections via command line the following errors are shown:
# openssl s_client -tls1_1 -connect 203.0.113.2:443
140057490097992:error:1409E0E5:SSL routines:SSL3_WRITE_BYTES:ssl handshake failure:s3_pkt.c:598:
# curl -v https://example.com/
* NSS error -5938
* Closing connection #0
* SSL connect error
curl: (35) SSL connect error
Misconfiguration of Default site security settings.
- Log into Plesk, if the issue occurred with the panel, log into Plesk over the port 8880.
- Set valid SSL certificate in Plesk > Domains > example2.com > Hosting Settings > Certificate (drop-down menu).
- If it is not possible, set Default site at Tools & Settings > IP Addresses > 203.0.113.2 to None or select domain that has SSL certificate configured properly.