Title Page
by Amjad Inamdar, Graham Bartlett
IKEv2 IPsec Virtual Private Networks: Understanding and Deploying IKEv2, IPsec VPNs, and FlexVPN in Cisco IOS
- About This E-Book
- Title Page
- Copyright Page
- About the Authors
- Note from the Authors
- About the Technical Reviewers
- Dedications
- Acknowledgments
- Contents at a Glance
- Contents
- Foreword
- Icons Used in This Book
- Command Syntax Conventions
- Introduction
- Goals and Methods
- Who Should Read This Book?
- How this book is organized
- Chapter 1 Introduction to IPsec VPNs
- Chapter 2 IKEv2 the Protocol
- Chapter 3 Comparison of IKEv1 and IKEv2
- Chapter 4 IOS IPsec implementation
- Chapter 5 IKEv2 Configuration
- Chapter 6 Advanced IKEv2 features
- Chapter 7 IKEv2 deployments
- Chapter 8 Introduction to FlexVPN
- Chapter 9 FlexVPN Server
- Chapter 10 FlexVPN Client
- Chapter 11 FlexVPN Load Balancer
- Chapter 12 FlexVPN Deployments
- Chapter 13 Monitoring IPsec VPNs
- Chapter 14 Troubleshooting IPsec VPNs
- Chapter 15 IPsec overhead and Fragmentation
- Chapter 16 Migration Strategies
- Part I: Understanding IPsec VPNs
- Part II: Understanding IKEv2
- Chapter 2. IKEv2: The Protocol
- IKEv2 Overview
- The IKEv2 Exchange
- IKE_SA_INIT
- Key Material Generation
- IKE_AUTH
- CREATE_CHILD_SA
- IKEv2 Packet Structure Overview
- The INFORMATIONAL Exchange
- IKEv2 and Network Address Translation
- Additions to RFC 7296
- RFC 5998 An Extension for EAP-Only Authentication in IKEv2
- RFC 5685 Redirect Mechanism for the Internet Key Exchange Protocol Version 2 (IKEv2)
- RFC 6989 Additional Diffie-Hellman Tests for the Internet Key Exchange Protocol Version 2 (IKEv2)
- RFC 6023 A Childless Initiation of the Internet Key Exchange Version 2 (IKEv2) Security Association (SA)
- Summary
- References
- Chapter 3. Comparison of IKEv1 and IKEv2
- Brief History of IKEv1
- Exchange Modes
- Anti-Denial of Service
- Lifetime
- Authentication
- High Availability
- Traffic Selectors
- Use of Identities
- Network Address Translation
- Configuration Payload
- Mobility & Multi-homing
- Matching on Identity
- Reliability
- Cryptographic Exchange Bloat
- Combined Mode Ciphers
- Continuous Channel Mode
- Summary
- References
- Chapter 2. IKEv2: The Protocol
- Part III: IPsec VPNs on Cisco IOS
- Part IV: IKEv2 Implementation
- Part V: FlexVPN
- Chapter 8. Introduction to FlexVPN
- Chapter 9. FlexVPN Server
- Sequence of Events
- EAP Authentication
- AAA-based Pre-shared Keys
- Accounting
- Per-Session Interface
- Auto Detection of Tunnel Transport and Encapsulation
- RADIUS Packet of Disconnect
- RADIUS Change of Authorization (CoA)
- IKEv2 Auto-Reconnect
- User Authentication, Using AnyConnect-EAP
- Dual-factor Authentication, Using AnyConnect-EAP
- RADIUS Attributes Supported by the FlexVPN Server
- Remote Access Clients Supported by FlexVPN Server
- Summary
- Reference
- Chapter 10. FlexVPN Client
- Introduction
- FlexVPN Client Overview
- Setting up the FlexVPN Server
- EAP Authentication
- Split-DNS
- Windows Internet Naming Service (WINS)
- Domain Name
- FlexVPN Client Profile
- Backup Gateways
- Tunnel Interface
- Tunnel Initiation
- Dial Backup
- Backup Group
- Network Address Translation
- Design Considerations
- Troubleshooting FlexVPN Client
- Summary
- Chapter 11. FlexVPN Load Balancer
- Chapter 12. FlexVPN Deployments
- Introduction
- FlexVPN AAA-Based Pre-Shared Keys
- FlexVPN User and Group Authorization
- FlexVPN Routing, Dual Stack, and Tunnel Mode Auto
- FlexVPN Client NAT to the Server-Assigned IP Address
- FlexVPN WAN Resiliency, Using Dynamic Tunnel Source
- FlexVPN Hub Resiliency, Using Backup Peers
- FlexVPN Backup Tunnel, Using Track-Based Tunnel Activation
- Summary
- Part VI: IPsec VPN Maintenance
- Chapter 13. Monitoring IPsec VPNs
- Chapter 14. Troubleshooting IPsec VPNs
- Part VII: IPsec Overhead
- Part VIII: Migration to IKEv2
- Chapter 16. Migration Strategies
- Introduction to Migrating to IKEv2 and FlexVPN
- Consideration when Migrating to IKEv2
- Hardware Limitations
- Current VPN Technology
- Routing Protocol Selection
- Restrictions When Running IKEv1 and IKEv2 Simultaneously
- Current Capacity
- IP Addresses
- Software
- Amending the VPN Gateway
- Global IKE and IPsec Commands
- FlexVPN Features
- Familiarization
- Client Awareness
- Public Key Infrastructure
- Internet Protocol Version 6
- Authentication
- High Availability
- Asymmetric Routing
- Migration Strategies
- Migration Verification
- Consideration for Topologies
- Summary
- Chapter 16. Migration Strategies
- Index
- Inside Front Cover
- Inside Back Cover
- Code Snippets
IKEv2 IPsec Virtual Private Networks
Understanding and Deploying IKEv2, IPsec VPNs, and FlexVPN in Cisco IOS
Graham Bartlett, CCIE No. 26709
Amjad Inamdar, CISSP No. 460898
800 East 96th Street
Indianapolis, Indiana, 46240 USA
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