Wireless Encryption Type In Outbound Packets? Enforcing Wireless Connection Type

Recently one of my clients had an internal breach of security (a direct result of not implimenting a recommendation we made, I might add). As part of a post-incident debriefing conference an issue was raised about how to detect if a remote client was using an unsecured wireless client. A question that was posed: is it possible to detect simply from packet analysis whether a remote user's computer is using a secure wireless connection- the object being to use firewall rules to block access based upon such packet analysis results. I am pretty sure that this isn't possible- that encryption and encryption method (WPA, WEP) information aren't in TCP/IP packets.

Correct?

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south.loop.blogger
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