Configuring the IPSec Policy.........................................................................................................................................................127
Configuring the Basic Parameters ...............................................................................................................................127
L2TP Configuration ........................................................................................................................................................132
Configuring the VPN IP Pool ..........................................................................................................................................................132
Configuring L2TP Globally ..............................................................................................................................................................133
Configuring the L2TP Server ........................................................................................................................................................133
Configuring the L2TP Client ..........................................................................................................................................................134
PPTP Configuration ........................................................................................................................................................138
Configuring the VPN IP Pool ..........................................................................................................................................................138
Configuring PPTP Globally .............................................................................................................................................................139
Configuring the PPTP Server ........................................................................................................................................................139
Configuring the PPTP Client ..........................................................................................................................................................140
Configuring the PPTP Users ..........................................................................................................................................................141
Configuration Examples ...............................................................................................................................................144
Example for Configuring IPSec VPN .........................................................................................................................................144
Network Requirements .......................................................................................................................................................144
Network Topology .................................................................................................................................................................144
Configuration Scheme ........................................................................................................................................................144
Configuration Procedure ...................................................................................................................................................144
Example for Configuring L2TP VPN ..........................................................................................................................................148
Network Requirements .......................................................................................................................................................148
Configuration Scheme ........................................................................................................................................................149
Configuration Procedure ...................................................................................................................................................149
Example for Configuring PPTP VPN ..........................................................................................................................................151
Network Requirements .......................................................................................................................................................151
Configuration Scheme ........................................................................................................................................................151
Configuration Procedure ...................................................................................................................................................151
Overview ............................................................................................................................................................................156
Typical Topology .................................................................................................................................................................................156
Portal Authentication Process .....................................................................................................................................................157