Wireless Networking What does it do ?

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Subject Author Date
What does it do ? Shadow 03-09-08
Posted by Shadow on March 9, 2008, 1:44 pm
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        I have a wireless PCI card based on a ralink RT61 chipset in
an old PC. It is connected to an antenna on top of my roof. There are
no ralink software or drivers on that PC.

        So what does the card do ?

        Does it transmit its MAC address ?
        Try to discover other APs around it ?
        Does it try to get an IP assigned to it ?
        Does it transmit at all ?


        Wandering about security issues ....

        []'s

Posted by News on March 9, 2008, 1:56 pm
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Shadow wrote:

>        I have a wireless PCI card based on a ralink RT61 chipset in
>an old PC. It is connected to an antenna on top of my roof. There are
>no ralink software or drivers on that PC.
>
>        So what does the card do ?
>
>        Does it transmit its MAC address ?
>        Try to discover other APs around it ?
>        Does it try to get an IP assigned to it ?
>        Does it transmit at all ?
>
>
>        Wandering about security issues ....
>
>
>

Keep wandering. You may stumble onto something.

Posted by Mark McIntyre on March 9, 2008, 4:52 pm
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Shadow wrote:
>         I have a wireless PCI card based on a ralink RT61 chipset in
> an old PC. It is connected to an antenna on top of my roof. There are
> no ralink software or drivers on that PC.
>
>         So what does the card do ?

Sit there absorbing a small amount of electricity. :-)

Without drivers, its doing nothing. However are you /sure/ there are no
drivers? If its a Windows PC it may have builtin drivers for the card.
In which case it's probably active, trying to find an AP to connect to.

>         Does it transmit its MAC address ?

If you activate it in infrastructure mode, then it'll periodically send
out broadcasts which will contain its MAC.

>         Wandering about security issues ....

If security is an issue, disable or remove the card.

Posted by Jeff Liebermann on March 9, 2008, 4:58 pm
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>        I have a wireless PCI card based on a ralink RT61 chipset in
>an old PC. It is connected to an antenna on top of my roof. There are
>no ralink software or drivers on that PC.
>
>        So what does the card do ?

That sounds like a frequency hopping spread spectrum chip used by
Raylink, Symbol, and WebGear cards. It's probably intended to connect
to a WISP (wireless internet service provider) that uses that
technology. Is it a PCMCIA card that's shoved into a PCI adapter?
Something like the tiny photos of the Raylink PCI adapter at:
<http://www.raylink.com/pdf/adapter_manual.pdf>

>        Does it transmit its MAC address ?

Yes. All wireless bridging does that.

>        Try to discover other APs around it ?

Nope.

>        Does it try to get an IP assigned to it ?

Yep. From the WISP's central router and DHCP server. Without a
contract, it's not going to happen.

>        Does it transmit at all ?

Yes.

>        Wandering about security issues ....

NO internet connection = few security issues.

>        []'s

???

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Posted by Shadow on March 11, 2008, 11:59 am
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wrote:

>
>>        I have a wireless PCI card based on a ralink RT61 chipset in
>>an old PC. It is connected to an antenna on top of my roof. There are
>>no ralink software or drivers on that PC.
>>
>>        So what does the card do ?
>
>That sounds like a frequency hopping spread spectrum chip used by
>Raylink, Symbol, and WebGear cards. It's probably intended to connect
>to a WISP (wireless internet service provider) that uses that
>technology. Is it a PCMCIA card that's shoved into a PCI adapter?
>Something like the tiny photos of the Raylink PCI adapter at:
><http://www.raylink.com/pdf/adapter_manual.pdf>

Here it is:

http://www.edimax.com/en/produce_detail.php?pd_id=1&pl1_id=1&pl2_id=44

>
>>        Does it transmit its MAC address ?
>
>Yes. All wireless bridging does that.
>
>>        Try to discover other APs around it ?
>
>Nope.
>
>>        Does it try to get an IP assigned to it ?
>
>Yep. From the WISP's central router and DHCP server. Without a
>contract, it's not going to happen.
        With drivers it gets an invalid 10.10.10.1 type address from
the ISP. Without drivers I can't see it :P
        Using linux.
>
>>        Does it transmit at all ?
>
>Yes.
>
>>        Wondering about security issues ....
>
>NO internet connection = few security issues.
        Like someone might locate the PC by the MAC address, even if I
unload the drivers. Using a directional antenna, and a netstumbler on
a laptop. Something like that.
        I deduce the answer is yes ....
        []'s