Configuring the Firewall

Access the server through SSH with an account with administrative privileges;

Open port TCP/443 on the local firewall with the following command:

# firewall-cmd --permanent --add-service=https

Stream also needs HTTP traffic allowed since it is required to set up the CRLDPs :

# firewall-cmd --permanent --add-service=http

To make the change effective, you need to restart the firewall service:

# systemctl restart firewalld