viii Contents
v1.0, March 2008
Configuring the WAN Mode ..........................................................................................2-15
Configuring Dynamic DNS (If Needed) .........................................................................2-16
Chapter 3
LAN Configuration
Configuring Your LAN (Local Area Network) ..................................................................3-1
Using the VPN Firewall as a DHCP Server ............ ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ..3-1
Configuring Multi-Home LAN IPs .............................................................................3-4
Managing Groups and Hosts ........... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ..3-6
Creating the Network Database ... ... ................ ... .... ... ... ... .... ... ... ................ ... .... ... ... ..3-6
Setting Up Address Reservation ............................................................................3-10
Configuring Static Routes .............................................................................................3-10
Static Route Example .............................................................................................3-11
RIP Configuration ...................................................................................................3-12
Chapter 4
Firewall Protection and Content Filtering
About Firewall Security ...................................................................................................4-1
Using Rules to Block or Allow Specific Kinds of Traffic ..................................................4-1
Services-Based Rules .................. ... ... .... ... ... ... ... .... ... ... ... ................. ... ... ... ... .... ... ... ..4-2
Outbound Rules (Service Blocking) ...................................................................4-2
Inbound Rules (Port Forwarding) ......................................................................4-4
Order of Precedence for Firewall Rules ...................................................................4-6
Setting LAN WAN Rules ..... ... ................ ... .... ... ... ... ................ .... ... ... ... .... ................ ... ... ..4-7
LAN WAN Outbound Services Rules .......................................................................4-8
LAN WAN Inbound Services Rules ..........................................................................4-9
Attack Checks .... ... ... .... ................ ... ... .... ................ ... ... ... ................. ... ... ... .............4-10
Session Limit ...................... ... .... ... ... ... .... ... ... ................ ... .... ... ... ... ................ .... ... ...4-12
Inbound Rules Examples .......................................................................................4-13
Hosting A Local Public Web Server .................................................................4-13
Allowing Videoconference from Restricted Addresses ....................................4-14
Setting Up One-to-One NAT Mapping ......... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ...4-15
Specifying an Exposed Host ........ .... ... ... ..........................................................4-17
Outbound Rules Example – Blocking Instant Messenger ......................................4-18
Adding Customized Services .... ... .... ... ... ... ....................................................................4-18
Specifying Quality of Service (QoS) Priorities ................. ... ... .... ... ... ... .... ... ... ... ... .... ... ...4-20
Setting a Schedule to Block or Allow Traffic .... ... ... ................ .... ... ... ... .... ... ... ... ... .... ... ...4-21