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This article explains how to capture RADIUS traffic using Wireshark.
If Wiresharkhowever if using PAP authentication protocol, then this article will explain how to decrypt the traffic to be able to see the username and passcode in plain text.
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- Launch the Wireshark app
- Select "Capture | Options"
- Enter "udp port 1812" in the Capture filter to capture UDP packet only
- Click the "Start" button to start capture
- Click "Capture | Stop" to end captureEnter "udp.port == 1812" in the display filter to display RADIUS traffic only
- You will now be able to view the Access-Request and Challenge packets
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