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I only capture broadcast and some probe responses of my wlan...

asked 2019-07-29 16:24:43 +0000

HelloFriend gravatar image

updated 2019-07-29 16:25:02 +0000

Good day people!

I’m trying to see all traffic flying around my wlan and only see mostly broadcast and sporadic probe responses. I’m using an Alfa adapter (AWUS036NHA, Atheros 802.11n) with Kali Linux. I use the “airmon-ng start wlan0” command, to be on monitor mode and I make sure it’s listening on the same channel.

I’m able, however, to catch other packets (data, request to send, clear to send, Acknoldgement, 802.11 block) from another wlan.

My router is an apple extreme and it doesn’t allow me to put the radio mode I want. It always gets set in “automátic”, which is set at 802.11a/n - 802.11b/g/n

Before I have used airodump-ng and have been able to capture traffic from specific BSSID and have been able to get http, ARP, DNS... tho most of the traffic, for reasons I’m simply not aware, most of it, the traffic belongs to ARP.

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answered 2019-07-29 20:36:45 +0000

Bob Jones gravatar image

Since that adapter is bgn only (no 5GHz), I suspect the issue for you is band:

  1. Most dual band clients prefer 5GHz, if available
  2. The AP is stated as set for 802.11abgn, so is dual band

I would suspect your clients are on 5GHz but you can only capture on 2.4GHz so are missing most of the traffic. If you can't change the AP, you can try to force a client to prefer 2.4GHz, or buy a capture adapter that supports dual band.

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Mr: it turns out you are right. I forced the client to use 2.4Ghz and it works. Thank you for sharing your wisdom. Regards.

HelloFriend gravatar imageHelloFriend ( 2019-07-30 01:39:50 +0000 )edit

If the answer is sufficient, could you accept with the check mark for others searching for similar issues?

Bob Jones gravatar imageBob Jones ( 2019-07-30 13:17:16 +0000 )edit

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Asked: 2019-07-29 16:24:43 +0000

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Last updated: Jul 29 '19