[Conan]

I think you should have added the command on how to open those ports in iptables.

yea indeed. please provide people to work with iptables.

if you don't know how just try it with "service iptables stop" remember this wil open all your ports and its not recomeded to keep open it forever.

I'd prefer having a firewall on my server than having a server that is very open to the internet.
I block some ports so only the server can access it using the loopback interface. (Ex. MySQL)