You can specify a port number (i.e. domain.com:8443) - 443 is default

Tests all (of the following) vulnerabilities (if applicable):

* ROBOT / Bleichenbacher check has been implemented. Read more about this old+new attack robot attack.

Powered by Testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.