For example, you may be troubleshooting a particular client device connecting to the network. The menu Advanced Wireless Settings will appear where you can change the channel.Ĭonsider filtering the packet capture to reduce clutter when analyzing packet traces.

To do this, click the Capture menu, choose Options, and click Wireless Settings. For example, if the wireless network is set to channel 1 for the traffic you’re interested in, then configure WireShark to monitor channel 1. To select an interface, click the Capture menu, choose Options, and select the appropriate interface.īe certain to monitor the correct RF channel. Ethereal doesn’t appear to be supported anymore, so use WireShark instead.īefore capturing packets, configure WireShark to interface with an 802.11 client device otherwise, you’ll get an alert “No capture interface selected!” when starting a packet capture. WireShark provides the same (if not better) functionality as Ethereal. Over a year ago, however, Ethereal’s lead developer (Gerald Combs) re-released the software as WireShark. You may be familiar with using Ethereal software for sniffing wireless networks. WireShark is freely-available software that interfaces with an 802.11 client card and passively captures (“sniffs”) 802.11 packets being transmitted within a wireless LAN. Learn tips on configuring and using this tool when analyzing and troubleshooting 802.11 wireless networks.

WireShark is free software that sniffs packets on wireless networks.

How to: Get Secure Remote Access with SSL VPNs (Part 1).

How To: Set Up an Internal RADIUS Server (Part 2).

How to: Get Secure Remote Access with SSL VPNs (Part 2).

Learn tips for configuring and using this tool when analyzing and troubleshooting 802.11 wireless networks.

Wifi sniffing