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Cisco Bug: CSCsg30118 - Web auth allows traffic on port 53 prior to client authentication

Last Modified

Jun 29, 2015

Products (1)

  • Cisco 4400 Series Wireless LAN Controllers

Known Affected Releases


Description (partial)


Enabling the web authorization (webauth) feature allows wireless clients to send DNS traffic over port 53.  This may allow wireless clients to tunnel traffic via this port.


Requires a WLC configured to restrict access to clients prior to WLAN authentication (webauth enabled).  This was observed on WLC 4402 running
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