Description: Determine if your server meets the requirements for enabling TLSv1.3.
To be able to use TLSv1.3, your Linux operating system must have openssl version 1.1.1 or newer. Examples of those that do:
- RHEL 8
- RHEL 9
- Ubuntu 18.04
- Ubuntu 20.04,
- Ubuntu 22.04
- Debian 10
- Debian 11
Use the commands below to determine your server's OpenSSL version and SSL and TLS versions.
Confirm the OpenSSL version:
openssl version
Output example:
root@openvpnaccessserver:~# openssl version
OpenSSL 1.1.1 11 Sep 2018
List the SSL/TLS versions supported:
openssl ciphers -v | awk '{print $2}' | sort | uniq
The output displays only the unique SSL/TLS versions from OpenSSL's ciphers.
Output example:
root@openvpnaccessserver:~# openssl ciphers -v | awk '{print $2}' | sort | uniq
SSLv3
TLSv1
TLSv1.2
TLSv1.3
If you have additional questions, please submit a ticket.
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