setting up a firewall on centos

[lookatmego]

Hey there,
ive been told by friends that my ports are open and that it can be used by others and etc. and have been told to set up a firewall now i know basically almost nothing about this and was wondering if i could get the commands or such on how to set it up thanks

[suwunk]

Hi Lookatmego,

You can use this command;

iptables -A INPUT -p tcp --destination-port PORT-NUMBER -j DROP

For example block port 135 for everyone:

iptables -A INPUT -p tcp --destination-port 135 -j DROP

Cheers