[Soekris] 4521 and two Prisim 2 cards and other questions

Jim Thompson jim at netgate.com
Wed Jul 9 10:31:00 UTC 2003

Keith Tucker writes:
> 1. Would it be possible to use a Soekris 4521 and two (prisim 2) WLAN PC
> cards to set up a two sector AP (1 card for each sector) and feed this
> with an ethernet connection while all the time routing between everything.  

Yes and No.

Yes, the digital hw will work (thats a Soekris question).
No, you're going to have RF issues. (not a Soekris question)

> Does HostAP support 2 WLAN cards in AP mode. 


> In anyones opinion, will the 4521 support the horsepower needed for
> this.  I estimate 10 - 30 users per sector.

Probably, unless you want to do essoteric things.  Packet forwarding
shouldn't be a problem, at least for the digital hw (Soekris
question), as long as you enable DMA in the hostap driver.

> 2.  Considering the above possible, is it possible under Linux
> network support to limit the bandwidth per user (connection,
> whatever).  In other words, I would want to limit each client to say
> 300K/second or so.

Yes, there are tools (code) for this.  How well they work is open to
question.  I encourage you to only drop (throttle) downlink packets.
Throwing away uplink packets is a sin.

> Also, can you restrict (allow, deny) connections to the AP by MAC
> address.  

Yes, hostap supports this (you'll end up writing some code).  Not a
Soekris question, btw.

> What other way would it be possible to keep unauthorized users
> off the network  (login using PPPoE or some other method).

Dozens.  Not a Soekris question.

> 3.  Is there a FAQ, instructions, or other documentation/website that
> explaines in detail how to build images from scratch for flash cards to
> boot the Soekris 4521 boards.  I know that there are images already out
> there, but I would really like to learn how this is done so that I can
> play around with it and tweek and experiment.

I'd kick the tires around NYCwireless(.net), SeattleWireless(.net) or
PersonalTelco(.net).  The last of these is Portland, OR.


"Speed, it seems to me, provides the one genuinely modern pleasure."
			-- Aldous Huxley (1894 - 1963)

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