iv
Portal stateful failover ·········································································································································· 127
Portal authentication across VPNs ····················································································································· 129
Portal configuration task list ········································································································································ 129
Configuration prerequisites ········································································································································· 130
Specifying the portal server ········································································································································ 131
Specifying the local portal server for Layer 2 portal authentication ······························································ 131
Specifying a portal server for Layer 3 portal authentication ·········································································· 132
Configuring the local portal server ···························································································································· 132
Customizing authentication pages ···················································································································· 132
Configuring the local portal server ···················································································································· 135
Enabling portal authentication ···································································································································· 136
Enabling Layer 2 portal authentication ············································································································· 136
Enabling Layer 3 portal authentication ············································································································· 136
Controlling access of portal users ······························································································································ 137
Configuring a portal-free rule····························································································································· 137
Configuring an authentication source subnet ··································································································· 138
Setting the maximum number of online portal users ························································································ 139
Specifying an authentication domain for portal users ····················································································· 139
Configuring Layer 2 portal authentication to support Web proxy ································································· 140
Enabling support for portal user moving ·········································································································· 140
Specifying an Auth-Fail VLAN for portal authentication ·························································································· 141
Configuring RADIUS related attributes ······················································································································ 142
Specifying NAS-Port-Type for an interface ······································································································· 142
Specifying a NAS ID profile for an interface ··································································································· 142
Specifying a source IP address for outgoing portal packets ··················································································· 143
Configuring portal stateful failover ····························································································································· 143
Specifying an auto redirection URL for authenticated portal users ········································································· 145
Configuring portal detection functions ······················································································································· 146
Configuring online Layer 2 portal user detection ···························································································· 146
Configuring the portal server detection function ······························································································ 146
Configuring portal user information synchronization ······················································································ 148
Logging off portal users ··············································································································································· 148
Displaying and maintaining portal ···························································································································· 149
Portal configuration examples ···································································································································· 150
Configuring direct portal authentication ··········································································································· 150
Configuring re-DHCP portal authentication ······································································································ 154
Configuring cross-subnet portal authentication ································································································ 156
Configuring direct portal authentication with extended functions·································································· 158
Configuring re-DHCP portal authentication with extended functions ···························································· 160
Configuring cross-subnet portal authentication with extended functions ······················································· 162
Configuring portal stateful failover ···················································································································· 164
Configuring portal server detection and portal user information synchronization ······································· 172
Cross-subnet portal authentication across VPNs ······························································································ 177
Configuring Layer 2 portal authentication ········································································································ 179
Troubleshooting portal ················································································································································· 183
Inconsistent keys on the access device and the portal server ········································································· 183
Incorrect server port number on the access device ·························································································· 183
Configuring triple authentication ··························································································································· 185
Overview ······································································································································································· 185
Triple authentication mechanism ······················································································································· 185
Using triple authentication with other features ································································································· 186
Configuring triple authentication ································································································································ 186
Triple authentication configuration examples ··········································································································· 187
Triple authentication basic function configuration example ··········································································· 187
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