Fortinet FortiGate FortiGate-500 Administration Manual page 9

L2TP .............................................................................................................................. 267
Setting up a L2TP-based VPN.................................................................................... 268
Enabling L2TP and specifying an L2TP range............................................................ 268
Configuring a Windows 2000 client for L2TP.............................................................. 269
Configuring a Windows XP client for L2TP ................................................................. 270
Certificates ...................................................................................................................... 272
Viewing the certificate list............................................................................................ 273
Generating a certificate request.................................................................................. 273
Installing a signed certificate ...................................................................................... 275
Enabling VPN access for specific certificate holders ................................................. 276
CLI configuration............................................................................................................. 277
ipsec phase1............................................................................................................... 277
ipsec phase2............................................................................................................... 279
ipsec vip ...................................................................................................................... 280
Authenticating peers with preshared keys ...................................................................... 282
Gateway-to-gateway VPN............................................................................................... 282
Dialup VPN ..................................................................................................................... 283
Dynamic DNS VPN ......................................................................................................... 283
Manual key IPSec VPN................................................................................................... 284
Adding firewall policies for IPSec VPN tunnels............................................................... 284
Setting the encryption policy direction ........................................................................ 284
Setting the source address for encrypted traffic ......................................................... 284
Setting the destination address for encrypted traffic................................................... 285
Adding an IPSec firewall encryption policy ................................................................. 285
Internet browsing through a VPN tunnel ......................................................................... 285
Configuring Internet browsing through a VPN tunnel.................................................. 286
IPSec VPN in Transparent mode.................................................................................... 287
Special rules ............................................................................................................... 287
Hub and spoke VPNs...................................................................................................... 288
Configuring the hub..................................................................................................... 288
Configuring spokes ..................................................................................................... 290
Redundant IPSec VPNs.................................................................................................. 291
Configuring redundant IPSec VPNs............................................................................ 291
Configuring IPSec virtual IP addresses .......................................................................... 292
Troubleshooting .............................................................................................................. 294
IPS ....................................................................................................................... 295
Signature......................................................................................................................... 296
Predefined................................................................................................................... 296
Custom........................................................................................................................ 300
Anomaly .......................................................................................................................... 302
Anomaly CLI configuration.......................................................................................... 305
Configuring IPS logging and alert email.......................................................................... 306
Default fail open setting .................................................................................................. 306
FortiGate-500 Administration Guide 01-28006-0007-20041105
Contents
9