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Restoring system settings to factory defaults .............................................69 Upgrade .............................................................................................. 70 Upgrade Firmware ......................................................................................70 Upgrade IDS Signature-database...............................................................70 Status ............................................................................................71 System ................................................................................................ 71 Interfaces ............................................................................................ 72 VPN..................................................................................................... 73 Connections ........................................................................................ 74 DHCP Server ...................................................................................... 75 Users................................................................................................... 76 How to read the logs....................................................................77 USAGE events .................................................................................... 77 DROP events ...................................................................................... 77 CONN events ...................................................................................... 78 Step by Step Guides ....................................................................79 LAN-to-LAN VPN using IPSec ............................................................ 80 Settings for Main office .................................................................................82 LAN-to-LAN VPN using PPTP ............................................................ 84 Settings for Main office .................................................................................86 LAN-to-LAN VPN using L2TP ............................................................. 90 Settings for Branch office .............................................................................90 Settings for Main office .................................................................................93 A more secure LAN-to-LAN VPN solution........................................... 97 Settings for Branch office .............................................................................97 Settings for Main office ...............................................................................100 Windows XP client and PPTP server ................................................ 101 Settings for the Windows XP client ............................................................101 Settings for Main office ...............................................................................108 Windows XP client and L2TP server .................................................. 111 Settings for the Windows XP client ............................................................111 Settings for Main office ...............................................................................113 Intrusion Detection and Prevention ....................................................115 Appendixes................................................................................. 118 Appendix A: ICMP Types and Codes .................................................118
