Implementing transparent firewalls in bridge mode using Fedora Core

von Ralf Spenneberg (Freelancer)

Samstag, 25.06.2005, UG4: Scheffel, 16:00-17:00 Uhr

This talk will start with a comparison of routing and bridging. I will explain the different approaches to decide wether a packet will be forwarded. Then an introduction to bridging code will be given. I will cover the ideas behind the Linux bridging code and its interaction with the netfilter code. The usage of the different netfilter tables and chains regarding the bridging code will be covered. Once the technical aspects of bridging are covered a bridging firewall will be configured and demonstrated. This will include the demonstration of the application of the bridging patch and the usage of the bridge utility. The talk will conclude giving some examples of future uses of bridge firewalls.

Über den Autor Ralf Spenneberg:

The Speaker has used Linux since 1992 and worked as a system
administrator since 1994. During this time he worked on numerous
Windows, Linux and UNIX systems. The last 6 years he has been working
as a freelancer in the Linux/UNIX field.
Most of the time he provides Linux/UNIX training. His specialty is
network administration and security (firewalling, VPNs, intrusion
detection).
He has developed several training classes used by Red Hat and and other
IT training companies in Germany.
He has spoken on several SANS conferences and even more UNIX/Linux
specific conferences. He was chosen to be member of the program comitee
of the Linux Kongress and the GUUG Frühjahrsfachgespräch.
2002 he published his first german book "Intrusion Detection für
Linux Server". His second german book "VPN mit Linux" was published in 2003. The last book in this series "Intrusion Detection und Prevention mit Snort&Co." was published in November 2004. At the moment he writes a book on Linux Firewalling.