Fixing ssl/tls vulnerabilities on CentOS 7.2

OpenSSL 1.0.1e is the latest available version for CentOS 7.2
By default, all ciphers and macs are enabled. To fix the SSL/TLS vulnerabilities, the weak ciphers and macs must be explicitly disabled as follows.
In the /etc/ssh/sshd_config, the following two lines must be added :

Ciphers aes128-ctr,aes192-ctr,aes256-ctr,,,


Restart the sshd unit :

systemctl restart sshd

Check the sshd unit log file :

journalctl -u sshd.service –since yesterday


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.