View Full Version : Knoppix as a wireless bridge?

06-05-2003, 04:56 AM
As of right now at my home I have setup knoppix as a dialup router, and I'm pretty well versed in linux routers. The issue I'm facing is that I'm fixing to move into a home I purchaced next to my parents house, and I would like to network the two houses together wirelessly. Here is the plan.

What I would like to do is have a Linksys WAP11 access point at my mom's house and use a knoppix box at my house that has a WUSB11 adapter and a regular network card and bridge eth0 and wlan0.

Here is the setup I would like:
:arrow: (mom's house);
home router[2.254]------> wap11[2.253] -->
++wireless hop+++
:arrow: (my house);
knoppix wifi card[2.252]--------> knoppix eth0[2.251]------> my switch--------> my wap11 for my home network[2.250]-------> my wireless laptop[2.118]
My desktop would also be plugged into my switch with the address of [2.249]

Is this possible? I would rather have everything on one subnet instead of having network at my house and at her house and the wifi side of my knoppix box with knoppix acting as a router between subnets. I know it wouldn't be routing because you don't route packets on the same subnet, but is there a way to do this with iptables just to bridge eth0 and wlan0? I guess I'm trying to make knoppix into a poor mans linksys WET11 Wireless bridge. :wink:

Sorry for the long post, but I figured it was best to explain the whole situation.


06-05-2003, 05:52 AM
is that possible ? I believe in order for this to happen, the linksys must also support bridge function or the packet on the other side just won't come over(and vice versa).

Why not just 2 sub-net which would make things simpler ?

06-05-2003, 03:22 PM
The linksys WAP11 supports a bridge function, but instead of using the WAP11 in bridge mode, I was going to put it in infrastructure mode and set it up in a window at my moms and put the wireless adapter on my knoppix box in a window at my house, and just have the knoppix box be a client off of the WAP11.
I just didn't want to have a seperate subnet on the eth0 side of my knoppix box. I would rather have eth0 and wlan0 be on the same subnet and have the traffic from my house to her's pass transparently through the knoppix machine.

06-05-2003, 03:54 PM
What you are proposing is not only feasable but I am doing it, though I am not using knoppix in my bridge I am using OpenBSD, but the configuration should roughly be the same. What you are doing is turning a$700 computer into a $5.00 bridge.

in the /etc just configure the interfaces:

not as dhcp
not to a static ip but as "up"




you can also add packet filtering or have the bridge do NAT

since you want to use knoppix though and knoppix is debian based I reccomend you read the following: http://www.wlug.org.nz/WirelessEthernetBridge

take care and good luck,

06-05-2003, 03:59 PM
Thanks for the replies!
I think I'm going to just get 2 WAP11s and call it a day. Although, I will attempt this project just for the sake of knowing how to do it. :wink:
I do however wish that a wireless bridge was $5, I would use them for everything! Unfortunatly the linksys WET11 wireless bridge is more expensive than a WAP11. So what do I do, buy a WAP11 and put it in bridge mode. :!:

06-06-2003, 06:06 PM
You may want to take a look at this post.