
308630-14.00 Rev 00 vii
Contents
Preface
Before You Begin ............................................................................................................. xv
Text Conventions .............................................................................................................xvi
Acronyms ........................................................................................................................xvii
Hard-Copy Technical Manuals .........................................................................................xix
How to Get Help ..............................................................................................................xix
Chapter 1
Overview of IPsec
About IPsec ....................................................................................................................1-2
Note Regarding IPsec and NAT ......................................................................................1-2
Network Requirements for Nortel Networks Routers ......................................................1-3
Supported Routers ...................................................................................................1-3
Supported WAN Protocols .......................................................................................1-3
IPsec Services ................................................................................................................1-4
Confidentiality ...........................................................................................................1-4
Integrity ....................................................................................................................1-4
Authentication ..........................................................................................................1-4
Additional IPsec Services ........................................................................................1-5
How IPsec Works ...........................................................................................................1-5
IPsec Protection .......................................................................................................1-5
IPsec Tunnel Mode ...................................................................................................1-6
IPsec Elements ...............................................................................................................1-7
Security Gateways ...................................................................................................1-8
Security Policies .......................................................................................................1-8
Policy Templates ................................................................................................1-9
Inbound Policies ................................................................................................1-9
Outbound Policies ............................................................................................1-10
Policy Criteria Specification .............................................................................1-10
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