This software setup is needed on the ethernet bridge computer. According to our Testing grounds.
As of kernel version 2.4.18 there's already support for the Ethernet Bridge
capability built-in. No patches needed so far.
But if we intend to use netfilter capabilities, because we want to run iptables on our new Linux router/fw box, we still need to apply a patch. Any patches needed can be found and downloaded on the sourceforge Ethernet Bridge homepage.
root@bridge:~> cd /usr/src/ root@bridge:~> wget -c http://bridge.sourceforge.net/devel/bridge-nf/bridge-nf-0.0.7-against-2.4.18.diff root@bridge:~> cd /usr/src/linux/ root@bridge:~> patch -p1 -i ../bridge-nf/bridge-nf-0.0.7-against-2.4.18.diff
Supposedly we want netfilter support on our bridge interface and we have already patched the vanillal kernel we may now activate some necessary kernel configuration items. On how to build a private kernel image see the CD-Net-Install-HOWTO, Toolbox. Oh, yeah, it's still in German only. Hm, I have to fix this some time..
Nevertheless, we start by now: In
Code maturity level options
[*] Prompt for development and/or incomplete code/drivers
Loadable module support
Ok, so far so good. Now, we go to
[*] Enable loadable module support [*] Set version information on all module symbols [*] Kernel module loader
[*] Network packet filtering (replaces ipchains) [*] Network packet filtering debugging
we mark any item we need as module. Now the long awaited item: activate
IP: Netfilter Configuration --->
as well as
<M> 802.1d Ethernet Bridging
[*] netfilter (firewalling) support
The above entry is available only if we successfully patched our kernel!
Finally, we just need a successful
cycle and we're done. Don't forget to edit
root@bridge:~> make dep clean bzImage modules modules_install
root@bridge:~> lilo -t root@bridge:~> lilo root@bridge:~> reboot
Perhaps we might mark our new kernel as the bridge kernel? We
vi the toplevel Makefile in our kernel sources and edit the head
We may actually set it to, say bridge? ;-)
modules_install we find the fresh modules in
Once our kernel has the capabilities needed to perform Ethernet Bridge and netfilter
actions, we prepare the user space tool
brctl is the configuration
tool we use to
set up anything to suit our needs.
We download the source tarball, unpack it and change directory into it.
At this time, read the
root@bridge:~> wget -c http://bridge.sourceforge.net/bridge-utils/bridge-utils-0.9.5.tar.gz root@bridge:~> tar xvzf bridge-utils-0.9.5.tar.gz root@bridge:~> cd bridge-utils-0.9.5
READMEand the files in the
doc/subdirectory. Then do a simple make and copy the resulting
This is it. Go for Setup now.
root@bridge:~> make root@bridge:~> cp -vi brctl/brctl /sbin/
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