Linux.com

Now if you are a Linux user, which obviously you are not, then you would know that most, if not all linux distros, default to installing iptables and ipchains. Just because there is no pretty little icon for you to click on that says "firewall here", click here to turn it on. Doesn't mean it's not there. The command line is a powerful tool and iptables and ipchains are powerful tools that can be used to manipulate ports and protocols. Please learn more about the things you are fiddling with before you post ignorant questions on forums, which pretty much tells the whole world that you are, to put it bluntly "stupid", no offense, just telling you how it is.

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