SSL VPN can use two protocols for tunneling packets. DTLS or TLS which stands for Datagram Transport Layer Security or Transport Layer Security. Both the IOS and ASA implementations of SSL VPN use TLS. So I think the keyword transport is what should be focused on when looking at the application of the feature and determining the layer that it is implemented on. Here is a good read.
http://en.wikipedia.org/wiki/Transport_Layer_Security Regards, Tyson Scott - CCIE #13513 R&S, Security, and SP Managing Partner / Sr. Instructor - IPexpert, Inc. Mailto: [email protected] Telephone: +1.810.326.1444, ext. 208 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com <http://www.ipexpert.com/> From: [email protected] [mailto:[email protected]] On Behalf Of Kingsley Charles Sent: Thursday, January 13, 2011 9:53 AM To: [email protected] Subject: [OSL | CCIE_Security] Is SSL a L4 or L7 VPN Hi all Is SSL a L4 or L7 VPN? SSL uses TCP port number 443 and is encapsulated in TCP. I usually claim it has L4/L7 VPN. But what should be QEQ answer? With regards Kings
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