December 2005
Intermediate to advanced
1032 pages
29h 12m
English
Content preview from The Complete Cisco VPN Configuration Guide
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SSL Overview
SSL is an emerging VPN implementation in the marketplace. It was designed for remote access solutions and does not provide site-to-site connections. SSL VPNs provide secure access primarily to web-based applications. Because SSL uses a web browser, users typically do not have to load any special client software on their desktops.
SSL VPNs operate at the session layer of the OSI Reference Model. And because the client is a web browser, only those applications that support a web browser, by default, will work with a VPN solution. Therefore, applications such as Telnet, FTP, SMTP, POP3, multimedia, IP telephony, remote desktop control, and others don’t work with SSL VPNs because they don’t use a web browser for their front-end user ...
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