Question
How to check what SSL/TLS versions are available for a website on a Plesk server?
Answer
- Open the https://www.cdn77.com/tls-test link.
- Enter the domain name, into the search bar and press the Test now button:
- In the next page see the Enabled SSL/TLS protocol versions section:
Note: the more online services with SSL/TLS or vulnerability checkers can be found here.
Manually from the side of Linux server
- Log into the server via SSH.
- Execute the command:
# nmap –script ssl-enum-ciphers -p 443 example.com | grep -E “TLSv|SSLv”
Note: replace the
example.comwith the name of the required domain.The output will be as shown below:
# | SSLv3: No supported ciphers found
 | TLSv1.0:
 | TLSv1.1:
 | TLSv1.2:
Note: in case the nmap utility is not installed on the sever, install it with the command:
-
For RHEL based systems (CentOS/CloudLinux):
# yum install nmap -y
-
For Debian based systems (Ubuntu/Debian):
# apt-get install nmap -y
