Chapter 4. IPSec Authentication and Authorization Models Telecommuting is increasingly becoming a part of everyday life, and IPSec connectivity is arguably the most popular connection method that telecommuters use to connect to a VPN across the public Internet. Given that telecommuters can be anywhere in the Internet, the successful completion of authorization and authentication is critical for granting access to the VPN. This chapter explores authentication and authorization models for the IPSec telecommuter. |