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 80 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