How to create outbound rules in Ubuntu Firewall with Firestarter
When it comes to blocking data emanating from your computer, Firestarter can enact two different modes: whitelist, and blacklist.
When it comes to blocking data emanating from your computer, Firestarter can enact two different modes: whitelist, and blacklist.
Inbound rules allow you to filter all incoming connections. By default, all uninvited incoming connections are turned away. Creating an inbound rule effectively allows you to create a "hole" in the firewall for certain types of connection to get through, as needed by particular programs.
You might not realize it but Ubuntu has a very powerful firewall built in. However it isn't activated out of the box. Some firewall configuration tools are provided but aren’t easy to use and definitely aren't recommended for those less-versed in networking fundamentals.