SAMS Teach Yourself Red Hat® Fedora™ 4 Linux® All in One

Managing the Fedora Core 4 Firewall

If your Fedora Core 4 PC will be connected to a network at any time, whether by Ethernet, modem, or some other technology, the first task in securing your Linux computer should be to shore up your network security at the packet level.

Specifically, you need to be able to tell Linux exactly what kinds of network traffic you expect and want to receive so that Linux can discard all the rest of the network traffic it receives. This configuration is done with the Security Level Configuration tool.

Redefining the Firewall More experienced network users may be confused by our use of the term firewall here. Traditional ...