8. User Authentication ........................................................................................ 317
8.1. Overview ............................................................................................ 317
9. VPN ............................................................................................................. 337
9.1. Overview ............................................................................................ 337
9.1.1. VPN Usage ............................................................................... 337
9.1.3. VPN Planning ........................................................................... 338
9.2. VPN Quick Start .................................................................................. 341
9.3. IPsec Components ................................................................................ 351
9.3.1. Overview ................................................................................. 351
9.4. IPsec Tunnels ...................................................................................... 365
9.4.1. Overview ................................................................................. 365
9.5. PPTP/L2TP ......................................................................................... 383
9.5.1. PPTP Servers ............................................................................ 383
9.5.2. L2TP Servers ............................................................................ 384
9.6. CA Server Access ................................................................................ 392
10. Traffic Management ...................................................................................... 402
10.1. Traffic Shaping .................................................................................. 402
10.1.1. Overview ................................................................................ 402
7
User Manual