User manual

DHCP Server .....................................................................................................106
Web Cache ........................................................................................................110
QoS Traffic Shaping ..........................................................................................116
IPv6....................................................................................................................118
4. Firewall ..................................................................................................119
Incoming Access................................................................................................119
Web Server........................................................................................................121
Customizing the Firewall....................................................................................123
Definitions ..........................................................................................................124
Packet Filtering..................................................................................................127
Network Address Translation (NAT) ..................................................................130
Connection Tracking..........................................................................................142
Intrusion Detection.............................................................................................143
Basic Intrusion Detection and Blocking (IDB) ....................................................144
Advanced Intrusion Detection and Prevention (Snort and IPS).........................147
Access Control and Content Filtering ................................................................150
Antivirus .............................................................................................................160
5. Virtual Private Networking...................................................................170
PPTP and L2TP.................................................................................................171
PPTP VPN Server .............................................................................................171
L2TP VPN Server ..............................................................................................179
PPTP and L2TP VPN Client ..............................................................................186
IPSec .................................................................................................................188
Set Up the Branch Office ...................................................................................189
Configuring the Headquarters............................................................................201
Tunnel List .........................................................................................................204
NAT Traversal Support ......................................................................................207
Dynamic DNS Support.......................................................................................207
Certificate Management.....................................................................................207
IPSec Troubleshooting ......................................................................................212
Port Tunnels ......................................................................................................215
6. USB........................................................................................................219
USB Mass Storage Devices ..............................................................................219
USB Printers ......................................................................................................226