Cisco Systems 3.5 manual Security, Replication Archive, Ensuring Data Integrity, Slave Server

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Chapter 4 Understanding Replication

How Replication Works

Slave Server

Step 1 When the slave server receives the transaction, its contents are verified.

Step 2 Once verified, the changes are applied to the slave server's database

Step 3 The changes are then applied (hot-configured) in the slave server's in-memory configuration.

Step 4 The transaction is written to the slave server's replication archive.

Security

Replication has two primary security concerns:

Security of the transactions transmitted to the slave server

Storage of transactions in the replication archive

Both of these concerns use shared secret (MD5) encryption via the shared secret specified in the replication configuration on both master and slave servers. Replication data transmitted between master and slave is encrypted at the source and decrypted at the destination the same way as standard RADIUS packets between Access Registrar's clients and the Access Registrar server. Transactions written to the replication archive are also encrypted in the same manner and decrypted when read from the replication archive.

Replication Archive

The replication archive serves two primary purposes:

1.To provide persistent, or saved, information regarding the last successful transaction

2.To persist transactions in case the slave server requires re synchronization (see Ensuring Data Integrity below for more information on re synchronization).

The replication archive is simply a directory located in ../CSCOar/data/archive. Each transaction replicated by the master is written to this directory as a single file. The name of each transaction file is of the form txn########## where ########## is the unique transaction number assigned by the master server. The replication archive size, that is the number of transaction files it may contain, is configured in the Replication configuration setting of TransactionArchiveLimit. When the TransactionArchive limit is exceeded, the oldest transaction file is deleted.

Ensuring Data Integrity

Access Registrar's configuration replication feature ensures data integrity through transaction data verification, transaction ordering, automatic resynchronization and manual full-resynchronization. With the single exception of a manual full-resynchronization, each of the following techniques help to automatically ensure that master and slave servers contain identical configurations. A detailed description of each technique follows.

Cisco Access Registrar 3.5 Concepts and Reference Guide

 

OL-2683-02

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Contents Corporate Headquarters Cisco Access Registrar 3.5 Concepts and Reference GuideCisco Access Registrar 3.5 Concepts and Reference Guide Iii N T E N T SSession-Service Service Step and Radius-Session Service Replication’s Impact on Request Processing IPAddress Port Understanding Snmp Vii Accounting Start Data FlowViii World Wide Web Obtaining DocumentationOrdering Documentation Obtaining Technical AssistanceDocumentation Feedback Cisco.comContacting TAC by Telephone Contacting TAC by Using the Cisco TAC WebsiteTechnical Assistance Center Xii Radius Protocol OverviewPacket Exchange Between User, NAS, and Radius Steps to ConnectionTypes of Radius Messages Packet ContentsAttribute Dictionary Proxy ServersProxying to an Ldap Server for Authentication Basic Authentication and AuthorizationOverview Basic Authentication and Authorization Cisco Access Registrar Hierarchy Understanding Cisco Access RegistrarUserLists and Groups ServicesProfiles ScriptsSession Management Using Resource Managers Subdirectory Description Cisco AR Directory StructureProgram Flow Client or NAS Scripting Points Scripting PointsCisco AR Server Action Explanation Action ExplanationRadius/Advanced/RequireNASsBehindProxyBeInClie Authentication and/or Authorization Scripting PointsFailover by the NAS and Session Management Session ManagementIncoming Scripts Authentication/Authorization ScriptsScript Processing Hierarchy Outgoing Scripts Cross Server Session and Resource ManagementOverview Configuring a Front Line Cisco Access Registrar Session-Service Service Step and Radius-Session ServiceConfigure Central AR OL-2683-02 AltigaIncomingScript Using Cisco AR ScriptsACMEOutgoingScript AltigaOutgoingScript AuthorizeServiceANAAAOutgoing AscendIncomingScriptCabletronIncoming AuthorizeTelnetCabletronOutgoing CiscoIncomingExecDNISRule ExecTimeRuleExecFilterRule ExecNASIPRuleMapSourceIPAddress LDAPOutageParseAAARealm ParseAAASRealmParseServiceAndAAASRealmHints ParseServiceAndAAARealmHintsParseServiceAndAARealmHints ParseServiceAndAASRealmHintsParseTranslationGroupsByCLID ParseServiceHintsParseTranslationGroupsByDNIS ParseTranslationGroupsByRealmUSROutgoingScript Replication Overview Understanding ReplicationMaster Server How Replication WorksReplication Data Flow Replication Archive SecurityEnsuring Data Integrity Slave ServerAutomatic Resynchronization Transaction Data VerificationTransaction Order Understanding Hot-Configuration Replication Configuration SettingsFull Resynchronization Replication’s Impact on Request ProcessingRepTransactionSyncInterval RepTypeRepTransactionArchiveLimit MasterRepPort RepIPAddressRepSecret RepIPMasterRep Members/Slave1 Rep Members SubdirectoryName IPAddressSupported MIBs OverviewRADIUS-AUTH-SERVER-MIB Snmp TrapsCarServerStart Supported TrapsCarServerStop CarInputQueueFullCarOtherAccServerNotResponding CarOtherAuthServerNotRespondingCarOtherAuthServerResponding CarOtherAccServerResponding Configuring TrapsCarAccountingLoggingFailure Directories SearchedSwitching Configuration Files in Mid-File Configuration File TypesCommunity String OL-2683-02 Prepaid Billing Solution Measurements and Component Actions Configuring Prepaid Billing Call Flow Details Generic Call FlowAttribute Number Attribute Name Description Access-Request AuthenticationAccess-Accept Authorization Access-Accept AuthenticationAccess-Request Authorization Attribute Number Attribute Name Accounting StartData Flow Accept-Accept Quota Depleted Access-Request Quota DepletedAccounting Response Final Status Accounting Stop Session EndSource VSA Name Type Call Flow Description Vendor-Specific AttributesTotal Volume quota received by Crbprivate GL-1 O S S a R YGL-2 Scalable wholesale access/open access solutionGL-3 GL-4 GL-5 GL-6 GL-7 GL-8 GL-9 GL-10 IN-1 RadiusIN-2 RFCIN-3 IN-4
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3.5 specifications

Cisco Systems 3.5 is an advanced version of Cisco's renowned networking and security solutions. This iteration showcases significant enhancements in performance, scalability, and security, making it a preferred choice for enterprises aiming to optimize their network operations and bolster their cybersecurity posture.

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Security is a major focus in Cisco Systems 3.5. The platform introduces advanced threat detection and response systems that utilize deep learning to identify and mitigate emerging threats in real-time. Enhanced encryption protocols ensure that data transmitted over the network remains secure, protecting sensitive information from cyber threats. The integrated security features ensure compliance with various regulatory standards, a crucial requirement for businesses across multiple sectors.

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