User manual

Routes ...............................................................................................................106
System...............................................................................................................115
DNS ...................................................................................................................116
DHCP Server.....................................................................................................118
Web Cache........................................................................................................123
QoS Traffic Shaping ..........................................................................................130
IPv6....................................................................................................................133
SIP.....................................................................................................................133
4. Firewall ..................................................................................................135
Incoming Access................................................................................................135
Web Management .............................................................................................137
Customizing the Firewall....................................................................................140
Definitions..........................................................................................................140
Packet Filtering..................................................................................................144
Network Address Translation (NAT) ..................................................................148
Connection Tracking..........................................................................................161
Intrusion Detection.............................................................................................163
Basic Intrusion Detection and Blocking (IDB) ....................................................164
Advanced Intrusion Detection and Prevention (Snort and IPS).........................166
Access Control and Content Filtering ................................................................171
Antivirus.............................................................................................................182
5. Virtual Private Networking ...................................................................193
PPTP and L2TP.................................................................................................194
PPTP VPN Server .............................................................................................194
L2TP VPN Server ..............................................................................................202
PPTP and L2TP VPN Client ..............................................................................209
IPSec .................................................................................................................211
Quick Setup .......................................................................................................212
Set Up the Branch Office...................................................................................215
Configuring the Headquarters............................................................................227
Tunnel List .........................................................................................................230
NAT Traversal Support......................................................................................233
Dynamic DNS Support.......................................................................................233
Certificate Management.....................................................................................233