How to enforce TLSv1.2 on Centos 7?

Posted July 15, 2018 19.9k views

I’m trying to enforce TLSv1.2 on my droplet. At the moment I got this in my ssl.conf file:

# grep -i sslprotocol /etc/httpd/conf.d/ssl.conf
SSLProtocol TLSv1.2

SSLProtocol hasn’t been defined anywhere else:

# find /etc/httpd/ -type f -exec grep -il 'sslprotocol' {} +

I’ve restarted httpd and have even rebooted the droplet. However, when I scan the droplet from my local machine it’s showing that both TLSv1.0 and TLSv1.1 are supported:

# nmap --script ssl-enum-ciphers -p 443 | grep TLSv
|   TLSv1.0: 
|   TLSv1.1: 
|   TLSv1.2: also shows that TLSv1.0 is still enabled, so I guess there’s something else I must do to disable it. Is there anyone who has achieved this and is happy to share how to do this?

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Submit an Answer
1 answer

Hello friend!

When defining the SSLProtocol variable in Apache, it may be beneficial for you to specifically disable the ones you don’t want. You can use +/- to enable/disable a specific protocol. For example, “-SSLv3” should disable SSLv3 where “+SSLv3” should enable it. I generally don’t reference manuals themselves but I actually love the Apache manual, so I’ll toss the reference here:

You can also find some strong SSL configuration templates to build on here:

Kind Regards,