[Cialug] iptables rule -> firewalld

[L. V. Lammert]

Need to persist a iptables rule, .. instead of hacking it in rc.local,
woudl prefer to do it the 'firewalld' way. Any recommendations on
translating?

In this example, need to redirect all outbound port 25 traffic on a Docker
host:

iptables -t nat -I PREROUTING -p tcp --dport 25 -j DNAT --to <MX IP>:25

All zones.

	Thanks!