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I am interested in being able log packets going over a unsecured wireless network. Specifically, I want to see HTTP POST / GET requests and responses going between the router and computers on the network. Which software do people use for this? I am running OSX and I have a RT73 chipset USB wireless card that supports passive mode.

Is there a way to do this over WEP encrypted networks (provided I know the key) as well?

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Hrrrmmmf... I suppose my comments that were here (and not deleted by me) belonged on meta anyway. –  Chris W. Rea Aug 23 '09 at 14:15
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up vote 5 down vote accepted

I would recommended Wireshark which will track any traffic on a particular network card.

From a Wireless router perspective I am not aware of any software that can do this unless the router itself is linux based in which case you can use tcpdump

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If you know the WEP or WPA password for the wireless network, you can see (and sniff) all the traffic on it. WEP/WPA only prevent users who don't know the password from seeing the traffic; once you know the password it's all open to you. –  Barry Brown Aug 22 '09 at 19:37
    
thank you, i have used wireshark in the past, but i had no idea it was this powerful. worked perfect : ) –  unknown Aug 23 '09 at 3:05
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A program like AirMagnet will allow you to sniff directly from your wireless adapter, even if you aren't connected to the networks.

A program like WireShark will allow you to sniff any network you are connected to.

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