[SM-Discuss] Wireless Bridge
Matthew Clark
matthewclark at inlesserterms.net
Wed Nov 14 13:50:14 EST 2007
I wanted to see if there's anyone out there who's been successful at
getting SMGL to run as a wireless bridge. And to make myself clear,
what I mean is to join a wired segment to another wired segment using
802.11. The local wired segment uses a common 802.11 wireless access
point (WRT54G, to be irrelevantly specific). The remote wired segment
will use the SMGL rig as a wireless bridge.
There's good information on this page:
http://www.linux-foundation.org/en/Net:Bridge
I have an old junker Dell machine that should suit this task
perfectly. Inside is an on-board 3c59x device (3com 3C905TX, eth0),
and in a PCI slot is a rt2500 (Linksys WMP54G, ra0).
I can't seem to make netconf play nicely with bridging, so I don't use
it at all. Instead, I have written a startup script that loads the
modules for each card, creates a bridge (br0), adds the interfaces to
the bridge, and sets an IP address to the bridge (so I can access the
system remotely if I have to). All of this works. In fact, I can
ping hosts through each interface from the bridge rig itself. Also, I
can issue a `brctl showmacs br0` and I can see a list of MAC addresses
on both interfaces. But nothing will communicate *through* the bridge.
Some reading suggests that what I want to do is only achievable using
a wireless card that employs a Prism chip (something to do with MAC
spoofing and how most Wi-Fi cards won't do it). I am unable to find
much of anything on which Wi-Fi cards have this chip, or if any other
wireless card will work.
So I turn to my fellow SMGL users to see if anyone else has built
their own wireless bridge, and how you did it (or anyone else who has
some knowledge that might make this work). I'm thinking someone's
going to either tell me I have it right, but I just need a specific
Wi-Fi card, or someone will know what I'm missing and share that hint
to get what I already have up and running. But bridge-utils seems
pretty simple, so what could I have missed?
- MaffooClock
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