User manual

DHCP Server .....................................................................................................111
Web Cache ........................................................................................................115
QoS Traffic Shaping ..........................................................................................123
IPv6....................................................................................................................125
SIP.....................................................................................................................125
4. Firewall ..................................................................................................127
Incoming Access................................................................................................127
Web Server........................................................................................................129
Customizing the Firewall....................................................................................131
Definitions ..........................................................................................................132
Packet Filtering..................................................................................................135
Network Address Translation (NAT) ..................................................................139
Connection Tracking..........................................................................................151
Intrusion Detection.............................................................................................152
Basic Intrusion Detection and Blocking (IDB) ....................................................153
Advanced Intrusion Detection and Prevention (Snort and IPS).........................156
Access Control and Content Filtering ................................................................159
Antivirus .............................................................................................................171
5. Virtual Private Networking...................................................................182
PPTP and L2TP.................................................................................................183
PPTP VPN Server .............................................................................................183
L2TP VPN Server ..............................................................................................191
PPTP and L2TP VPN Client ..............................................................................198
IPSec .................................................................................................................200
Set Up the Branch Office ...................................................................................201
Configuring the Headquarters............................................................................213
Tunnel List .........................................................................................................216
NAT Traversal Support ......................................................................................219
Dynamic DNS Support.......................................................................................219
Certificate Management.....................................................................................219
IPSec Failover ...................................................................................................224
IPSec Troubleshooting ......................................................................................234
Port Tunnels ......................................................................................................237