IT/Software/Server Config/UFW
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This is the default firewall in Linux
Turn it on
sudo ufw enable
Check Status
sudo ufw status
Add a port
sudo ufw allow 22
Close a port
sudo ufw deny 22
We normally open
http 22 https 443 ssh 22 nfs 111(tcp/udp) 2049 cups 631, 53, 5353, 6566 nomachine 4000
Additionaly if you are mounting nfs shares in fstab you may end up needing more ports.
rund this command and see what ports it uses. Then open those.
sudo mount -a -v
We ended up opening 41238 and 53847 just for nfs