Cisco Systems C7200 manual Data Encryption Overview

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C H A P T E R 1

Overview

This chapter describes the C7200 VSA (VPN Services Adapter) and contains the following sections:

•Data Encryption Overview, page 1-1

•VSA Overview, page 1-2

•Hardware Required, page 1-4

•Features, page 1-4

•Supported Standards, MIBs, and RFCs, page 1-5

•Enabling/Disabling the VSA, page 1-6

•LEDs, page 1-7

•Connectors, page 1-8

•Slot Locations, page 1-8

Data Encryption Overview

This section describes data encryption, including the IPSec, IKE, and certification authority (CA) interoperability features.

Note For additional information on these features, refer to the “IP Security and Encryption” chapter in the Security Configuration Guide and Security Command Reference publications.

IPSec is a network level open standards framework, developed by the Internet Engineering Task Force (IETF) that provides secure transmission of sensitive information over unprotected networks such as the Internet. IPSec includes data authentication, antireplay services and data confidentiality services.

Cisco follows these data encryption standards:

•IPSec—IPSec is an IP layer open standards framework that provides data confidentiality, data integrity, and data authentication between participating peers. IKE handles negotiation of protocols and algorithms based on local policy, and generates the encryption and authentication keys to be used by IPSec. IPSec protects one or more data flows between a pair of hosts, between a pair of security routers, or between a security router and a host.

C7200 VSA (VPN Services Adapter) Installation and Configuration Guide

	OL-9129-02	1-1

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Contents Text Part Number OL-9129-02 Corporate HeadquartersPage N T E N T S Preventing Electrostatic Discharge Damage 2 Creating Dynamic Crypto Maps 4 OL-9129-02 Audience PrefaceObjectives OrganizationChapter Title Description Related Documentation Obtaining DocumentationCisco.com Documentation Feedback Cisco Product Security OverviewProduct Documentation DVD Ordering Documentation Product Alerts and Field Notices Reporting Security Problems in Cisco ProductsCisco Technical Support & Documentation Website Obtaining Technical AssistanceSubmitting a Service Request Definitions of Service Request SeverityObtaining Additional Publications and Information Xiv Data Encryption Overview OverviewVSA Overview VSA Module Front View Screws Handle Status LED lightHardware Required FeaturesThis section describes the VSA features, as listed in Table Feature Description/BenefitMIBs Supported Standards, MIBs, and RFCsPerformance StandardsEnabling/Disabling Scheme Command PurposeEnabling/Disabling the VSA Disabling the VSA during OperationCondition System is Configured Command Description of VSA BehaviorLEDs Cisco 7204VXR Router ConnectorsSee -2for the VSA connectors Slot LocationsCisco 7204VXR Router Front View Port adapter VSA in I/O controller slot Port adapter leverCisco 7206VXR Front View Cisco 7206VXR RouterHardware and Software Requirements Required Tools and EquipmentPlatform Software RequirementsHardware Requirements RestrictionsSafety Guidelines Safety WarningsOnline Insertion and Removal OIR Preventing Electrostatic Discharge Damage Electrical Equipment GuidelinesPreparing for Installation OL-9129-02 VSA circuit board is sensitive to ESD damage Handling the VSAThis section describes how to remove and install the VSA VSA Removal and InstallationRemoving and Installing the VSA VSA Removal and Installation OL-9129-02 Overview Configuration TasksConfiguring an IKE Policy Using the Exec Command InterpreterSignatures as the authentication method Key Management Protocol Isakmp policy configurationConfig-isakmp mode Optional Specifies the authentication method within an IKEDisabling VSA Optional Configuring a Transform SetDefining a Transform Set Transform type Description Crypto Transform Configuration Mode IPSec Protocols AH and ESPSelecting Appropriate Transforms Changing Existing Transforms Configuring IPSecEnsuring That Access Lists Are Compatible with IPSec Setting Global Lifetimes for IPSec Security AssociationsStep Command Purpose Creating Crypto Map Entries Creating Crypto Access ListsExits crypto-map configuration mode and return to Only one transform set can be specified when IKE isAuthenticator keys if the transform set includes an ESP authenticator algorithmCreating Dynamic Crypto Maps For this crypto access list Optional Accesses list number or name of anExtended access list. This access list determines If this is configured, the data flow identity proposedApplying Crypto Map Sets to Interfaces Monitoring and Maintaining IPSecRouter# show crypto isakmp policy Verifying IKE and IPSec ConfigurationsVerifying the Configuration Currentpeer 172.21.114.67 PERMIT, flags=originisacl This section provides the following configuration examples Configuration ExamplesConfiguring IKE Policies Example Configuring IPSec Configuration ExampleBasic IPSec Configuration Illustration Router a ConfigurationCrypto map is applied to an interface Router B Configuration Transform set defines how the traffic will be protectedSpecify the parameters to be used during an IKE negotiation Router# show diag Troubleshooting TipsTunnel I/F Monitoring and Maintaining the VSA Using Deny Policies in Access ListsConfiguration Guidelines and Restrictions Monitor and Maintenance CommandsD E Sa command, clear crypto Entries, creating Set pfs commandSet session-key command Set transform-set command Handling VPN Acceleration Module see VAM 1 Features Handling Monitoring and maintaining 4 OverviewIN-4