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Is it possible to know the gateway address of a wireless AP that I'm not connected to through sniffing? Airodump-ng can show MAC addresses of the AP and the clients associated but doesn't show IP addresses. Is there a way around this?

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Why are you attempting this? You are aware that this is a site for professional sysadmins, i.e. those who setup systems such as this. I have a feeling this is a bit like you've walked into a police station asking for tips on how to rob a bank. – Chopper3 Dec 30 '11 at 15:25
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If there are clients connected, that means that someone within a couple hundred feet of you is connected. Ask around. Should we migrate this to socialengineering.stackexchange.com? – Safado Dec 30 '11 at 15:38
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closed as not constructive by jftuga, DJ Pon3, Mark Henderson♦ Dec 30 '11 at 19:54

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2 Answers

up vote 3 down vote

If the network is open (unencrypted) then yes; you can capture the full packets of connected clients and see the addresses in IP and ARP packets.

If the network is encrypted, then no; all of the layer 3 communication is encapsulated in encrypted packets at all times, and the MAC addresses on the transmissions is all you can get without breaking the encryption.

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up vote 2 down vote

Despite the fact I've only just joined the site yesterday - I have to say coming on here and asking this without putting anything in doesn't look impressive - if you had a heap of questions/answers relating to network security then I could believe you with to increase your knowledge to help protect your own network by attempting penetration testing.

However if that was that case you would probably either know the answer to, or how to find the answer to your own question.

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