How do I port out a new port within MineOS

Hi, I need to port forward 25567 so my server can be seen by the network, as I plan to have 2 minecraft servers running.
I have got to this stage, as shown in the picture. But when I reboot the server the iptables info does not seem to be saved.

I have tried the following commands to save but still no luck.

iptables-save > /etc/iptables/rules.v4 & sudo netfilter-persistent save

Welcome to the Community!

There’s a helpful guide in the wiki to using iptables here:

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