.Enable Masquerade to allow port forwarding
[source, console]
----
sudo firewall-cmd --permanent --add-masquerade
----

.Forward TFTP UDP port 69 to 6969
[source, console]
----
sudo firewall-cmd --permanent --add-port=69/udp
sudo firewall-cmd --permanent --add-port=6969/udp
sudo firewall-cmd --permanent --add-forward-port=port=69:proto=udp:toport=6969
sudo systemctl reload firewalld
----
