Chapter 7. Modifying firewall rules

Procedure

1. On each NBDE key server:

   1. Open ports required to serve encryption keys.

      Note

      The default port is 80/tcp. To use a custom port, see Deploying a tang server with SELinux in enforcing mode in the Red Hat Enterprise Linux 8 documentation.

      # firewall-cmd --add-port=80/tcp
      # firewall-cmd --add-port=80/tcp --permanent

   2. Verify that the port appears in the output of the following command.

      # firewall-cmd --list-ports | grep '80/tcp'