From: Michael Melanson (ksysvp.diiu@dialterra.com.br)
Date: Mon Aug 25 2003 - 04:42:17 EEST
>
> From: Andrew Bates <gfud@proxy.uson.mx>
> Date: 2003/08/24 Sun PM 08:14:40 EST
> To: A Gilmore <joeluki.jirde@pgw.com>
> CC: rtchztzf.yxdvnxl@baden-airpark.de
> Subject: Re: transparent internet via radio
>
> Adrien,
>
> You should investigate using wireless ethernet (802.11b). Several of
> the 802.11b channels are in the Amateur spectrum. Also, the equipment
> is widely available and quite afordable. By utilizing yagi or parabolic
> antennas and good transcievers, you should be able to achieve a 15 mile
> distance while maintaining at least 1mbps or better.
>
> Of course, one of the drawbacks is that 802.11b requires nearly a
> line-of-site path as 2ghz signals are easily reflected or absorbed by
> obstructions.
>
> Hope this helps!
> Andrew/KB0LND
>
> A Gilmore wrote:
>
> >Having always had high-speed internet available, I have never looked
> >into radio technology before. However, I have been asked recently if
> >providing internet to a number of locations (varying between 10-50km
> >away from central computer lab) is possible. Neither dial-up or
> >broadband is accessible in these locations.
> >
> >So I started looking into radio. I will have one LAN with broadband
> >internet, and remote LANs without any internet access. The idea is to
> >put a TNC equipped linux gateway at each remote location, to tunnel
> >TCP/IP over AX.25 to the central LAN with broadband, and route the
> >TCP/IP from there.
> >
> >Is this feasible? Can speed be in the 28kbps or better range?
> >Generally how much would the radio equipment cost? Is providing
> >transparent internet by these means difficult, regarding routing and
> >interfacing the protocols?
> >
> >Sorry if these questions are vague or overly simple, Id just like to
> >know if this is possible before I spend the next several days
> >researching it. Most of the information I have found so far, has been
> >out-dated, and mostly focused on using TCP/IP to carry AX.25, rather
> >then the vice-versa.
> >Adrien
> >
> >-
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> >
> >
>
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>
As for the transparent routing, this is certainly possible. It's called IP Masquerading in Linux and it's a form of NAT (Network Address Translation). I have a nearly identical setup going, using DSL instead of a wireless link, but other than the link, the two are the same. There is a good HOWTO at this URL:
http://www.ibiblio.org/pub/Linux/docs/HOWTO/other-formats/html_single/IP-Masquerade-HOWTO.html
It is geared towards a setup like mine using DSL, but it should be trivial to change it
Cheers,
Michael VE3MTM
73 33
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