User's Manual

Contents vii
202-10015-01M-10207-01, Reference Manual v2
Configure Global Policy Settings ....................................................................................9-4
Network Address Translation (NAT) ...............................................................................9-6
Connection Monitor ........................................................................................................9-7
Manual keys ...................................................................................................................9-9
Enable Manual Keys ..............................................................................................9-10
Enter Inbound and Outbound Manual Keys ........................................................... 9-11
Start a Secure Connection with Manual Keys ........................................................9-13
Disable Manual Keys .............................................................................................9-13
Appendix A
Networks, Routing, and Firewall Basics
Related Publications ...................................................................................................... A-1
Basic Router Concepts .................................................................................................. A-1
What is a Router? ................................................................................................... A-1
Routing Information Protocol ................................................................................... A-2
IP Addresses and the Internet ................................................................................. A-2
Netmask .................................................................................................................. A-4
Subnet Addressing .................................................................................................. A-4
Private IP Addresses ............................................................................................... A-7
Single IP Address Operation Using NAT ................................................................. A-8
MAC Addresses and Address Resolution Protocol ................................................. A-9
Related Documents ................................................................................................. A-9
Domain Name Server .............................................................................................. A-9
IP Configuration by DHCP .................................................................................... A-10
Internet Security and Firewalls .................................................................................... A-10
What is a Firewall? .................................................................................................A-11
Stateful Packet Inspection ......................................................................................A-11
Denial of Service Attack .........................................................................................A-11
Appendix B
Virtual Private Networking
What is a VPN? ............................................................................................................. B-1
What Is IPSec and How Does It Work? ......................................................................... B-2
IPSec Security Features ......................................................................................... B-2
IPSec Components ................................................................................................. B-2
Encapsulating Security Payload (ESP) ................................................................... B-3
Authentication Header (AH) .................................................................................... B-4