Like every other website on the planet, SmallNetBuilder uses cookies. Our cookies track login status, but we only allow admins to log in anyway, so those don't apply to you. Any other cookies you pick up during your visit come from advertisers, which we don't control.
If you continue to use the site, you agree to tolerate our use of cookies. Thank you!

Router Charts

Click for Router Charts

Router Ranker

Click for Router Ranker

NAS Charts

Click for NAS Charts

NAS Ranker

Click for NAS Ranker

More Tools

Click for More Tools

Wireless How To

Step 2 - Set Card to Monitor Mode

As mentioned earlier, the WLAN card you use must be capable of being put into "monitor" mode. This means that it can capture all packets it detects and not just the ones intended for its MAC address. This is similar to an Ethernet card being put into promiscuous mode, which is required for packet sniffers / analyzers such as Wireshark (Ethereal) or OmniPeek Personal.

We'll use the airmon-ng script to put the card into monitor mode. First just type:

airmon-ng

to check the adapter status. Then:

airmon-ng stop ath0

to stop the interface. Then type:

airmon-ng start wifi0

to restart the adapter in monitor mode.

Note that you use wifi0, not ath0 in the start command. This has to do with the way that the Atheros madwifi driver works. The sequence and resulting output from each command line are shown in Figure 2.

airmon-ng command output
Click to enlarge image

Figure 2: airmon-ng command output

You can check that monitor mode is enabled by entering the iwconfig command. Figure 3 shows the result, which confirms that the adapter is in monitor mode and ready to go.

Atheros adapter in monitor mode

Figure 3: Atheros adapter in monitor mode

More Wireless

Wi-Fi System Tools
Check out our Wi-Fi System Charts, Ranker and Finder!

Support Us!

If you like what we do and want to thank us, just buy something on Amazon. We'll get a small commission on anything you buy. Thanks!

Over In The Forums

My friend is going to upgrade his system, and he's asking me for advice to do so. I have enough knowledge on router side, but for cable modem, there i...
Can any mod delete my post in "Other Lan and Wan" subforum? Just notice I accidentally posted in it. Sorry for the inconvenience and thank you.-------...
My base router is an Asus AC87U, and I'm using an AC68U as a repeater. Works pretty well; the AC68U reports "Link rate: 234 Mbps, RSSI: -58 dBm" and w...
Hello,I recently purchased a hardware firewall and have set it up at home. With this installed, my network topology is basically internet--->firewall-...
hey guys i have a network with an ac68u as the main router and a bunch of asus/other routers in access point mode. this setup has worked fine for the ...

Don't Miss These

  • 1
  • 2
  • 3