You'll never be safe from someone who "wants" to get your signal/data.  But for 
typical laptop w/ integrated wireless reducing the power would help reduce the 
range.

You deal with the 99% and try your best to protect yourself from the 1%.

John
-----Original Message-----
From: Espen Johansen [mailto:[EMAIL PROTECTED] 
Sent: Saturday, September 24, 2005 5:57 PM
To: support@pfsense.com
Subject: Re: [pfSense Support] Output (mwatt) of a minipci wireless card

Hi,

I'm sorry but you guys need to read up on wireless.

1: Wireless output power has "nothing" to do with the range. If the
receiving end uses a high performance antenna they can both talk and listen
to your AP many miles away.

2. High power cards only gives you more noise. Stick to a cm-9 type card
with high RX sensitivity. That will give you much better results.

You can not restrict the range of wireless buy lowering the output RX power.
Radio lan can not be restricted this way. It's a 2way communication, so
anyone with a high gain antenna can both talk and listen to a low powered
AP.

Range for a 100mw card with a 32dbi directional antenna at NLOS is about
120KM so if you guys think that restricting the TX power is going to keep
you safe from the next door internet café, then you are very much mistaken.

Cheers and good night.

-lsf


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