I would like to secure my VPS. That’s why I had to find some more informations about firewalls. The most interesting idea… “firewall” via iptales. However managing iptables is a litlle bit complicated, so I decided to use UFW.

What you have to know: UFW is not the firewall. UFW just configures your iptables

And that’s what I was looking for.

First… check what you have installed on your server and which ports are opened. Do it by ‘ps -aux’ and ‘nmap’. Consider which ports you would like to have opened and which ones should be closed.

Next… install UFW:

sudo apt-get install ufw

and disable all ports:

sudo ufw default deny

Next… configure your firewall.

I would like to have one port opened (80) and one port opened just for my IP (22). So I need to do:

sudo ufw allow to any port 80
sudo ufw allow from MY_IP_ADDRESS to any port 22

and that’s all.

Now turn on the firewall:

sudo ufw enable

and check everything:

sudo ufw status

More commands and informations related to UFW:
http://ubuntuforums.org/showthread.php?t=823741

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Hello, I'm Karol Zielinski, internet evangelist, an entrepreneur, project manager and a web developer from Gdynia, Poland. I like creative design, good advertisement, social media and all kind of stuff around the web.

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