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Ethernet Bridge + netfilter Howto

Nils Radtke

v0.2, October 2002

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Setting up an ethernet bridge gives us the chance to integrate a surveying and/or regulating instance transparently into an existing network. This setup requires no changes to the logical network topology. It is accomplished by plugging the ethernet bridge in the physical network topology between the network itself and the routing instance (that piece of hardware connected to the Internet).

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This Howto is available in other formats. Preferably downloadable: documentation tarball. You may find this Howto as part of the Linux Documentation Project.
Looking for other languages? See the German version, then!

History
2002-09-19: links about ebtables have been updated in the "Related Topics" Section. Added note about "false positive" br-nf debugging output.
2002-10-08: Added section Actual configuration and hints about routing in Setting up the routing, Ping it, Jim! , resp.

1. Introduction

2. Required software

• 2.1 Featured Linux kernel
• 2.2 Userspace tool: brctl

3. Set Linux up to serve

• 3.1 Setting up the bridge
• 3.2 Setting up the routing

4. Test your new bridged environment!

• 4.1 Testing Grounds
• 4.2 Ping it, Jim!
• 4.3 Actual configuration
• 4.4 Note

5. Links

• 5.1 Ethernet-Bridge
• 5.2 Related Topics

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