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Model 3: End-System Authorization with Assessment
2-8 NAC Deployment Models
ARADIUSserverisonlyrequiredifout‐of‐bandnetworkaccesscontrolusingtheNACGateway,
orinlinenetworkaccesscontrolusingtheLayer2NACController,isimplementedwithweb‐
basedand/or802.1Xauthenticati on.
NetSightPolicyManagerisrequiredforallinlineNACdeployments,andrecommendedforout‐
of
‐bandNACdeploymentsthatutilizeEnterasyspolicy‐capableswitches.PolicyManager
providestheabilitytocentrallydefineandconfiguretheauthorizationlevelsorpolicies.
NetSightInventoryManagerisanoptionalcomponent,providingcomprehensivenetwork
inventoryandchangemanagementcapabilities.
Model 3: End-System Authorization with Assessment
ThisNACdeploymentmodelimplementsthedetection,authentication,assessmentand
authorizationNACfunctionalitiesforconnectingend‐systems.InModel2,end‐systemsandend
usersconnectedtothenetworkareauthorizedbasedonthedeviceidentity,useridentity,and/or
locationinformation.Model3extendstheauthorizationdecisioninNACtoone
additional
dimension—thesecuritypostureoftheend‐systemasdeterminedfromanassessment.The
assessmentcanbeexecutedthroughagent‐basedoragent‐lesstechniquesandcanidentify
differentpiecesofinformationaboutthedevice,suchanantivirussoftwareconfiguration,
operatingsystempatchesinstalled,softwareapplicationsinstalledand
running,processes
running,servicesconfigured,andregistryvaluesset.
ItisimportanttonotethatitisnotnecessarytoconfiguretheEnterasysNACsolutionto
quarantineend‐systemsthatfailassessment.Infact,duringtheinitialrolloutofNAConthe
enterprisenetwork,itishighlyrecommendedthatend‐systems
arenotrestrictedaccesstothe
networkinanywaybefore,during,orafterfailedassessment.ThispassiveNACconfiguration
allowstheITadministratortobaselinetheconfigurationofdevicesonthenetworkand
understandthecurrentlandscapeofitsassetswithoutimpactingnetworkconnectivityfor
connectingend‐systems.Inthis
configuration,itisnotnecessarytoinformtheendusersthatthey
arebeingassessedorhavefailedassessmentbecausethereislittle‐to‐noimpactonnetwork
connectivityduringthisassessment.End‐systemscanbescannedinthebackgroundproviding
thenetworkadministratorwithimportantvisibilityintohowdevices
areconfiguredontheir
network,whileenduserscanutilizethenetworkasdesired.Then,whenthenetwork
administratorisready,theEnterasysNACsolutioncanbeconfiguredwiththeclickofabuttonto
immediatelyrestrictaccessforend‐systemsthathavefailedassessment.
Implementation
InModel3,end‐systemscanbedetectedandtracked,authenticated,assessed,andauthorizedin
differentwaysdependingonwhetherinlineorout‐of‐bandnetworkaccesscontrolis
implementedintheEnterasysNACsolution.
Out-of-Band NAC
Forout‐of‐bandEnterasysNACdeploymentsutilizingtheNACGateway,NACfunctionsare
implementedinthefollowingway:
Detection‐AsdescribedinModel2.
Authentication‐AsdescribedinModel2.
Assessment‐TheNACGatewaycanleverageeitherlocalassessmentservicesand/orremote
assessmentservicesdeployedonthenetwork.TheNACGatewayʹ
slocalassessmentservices
includeagent‐lessassessmentwhichcanexecutevariousserver‐sidechecks(whetheranFTP
- Enterasys 1
- Contents 5
- Chapter 3: Use Scenarios 6
- Chapter 4: Design Planning 6
- Chapter 5: Design Procedures 6
- About This Guide 9
- Getting Help 10
- Overview 11
- Deployment Models 12
- NAC Solution Overview 13
- NAC Solution Components 14
- NAC Gateway Appliance 15
- NAC Controller Appliance 15
- 1-6 Overview 16
- Appliance Comparison 17
- 1-8 Overview 18
- NetSight Management 19
- RADIUS Server 20
- Assessment Server 20
- 1-12 Overview 22
- NAC Deployment Models 23
- Features and Value 24
- Implementation 26
- User-Based Authorization 28
- MAC Registration 28
- Inline NAC 31
- Remediation 34
- 2-16 NAC Deployment Models 38
- Use Scenarios 39
- Policy-Enabled Edge 40
- RFC 3580 Capable Edge 41
- Scenario 1 Implementation 42
- Thin Wireless Edge 43
- 3-6 Use Scenarios 44
- Thick Wireless Edge 45
- Scenario 2 Implementation 46
- 3-10 Use Scenarios 48
- Scenario 4: VPN Remote Access 49
- Scenario 4 Implementation 50
- 3-14 Use Scenarios 52
- Design Planning 53
- Survey the Network 54
- 4-4 Design Planning 56
- End-System Capabilities 58
- Authentication Considerations 59
- 4-8 Design Planning 60
- Wired LAN 61
- Wireless LAN 61
- Remote Access WAN 62
- Site-to-Site VPN 62
- Remote Access VPN 63
- 4-12 Design Planning 64
- Design Procedures 65
- 5-2 Design Procedures 66
- NAC Configurations 67
- Authentication 68
- Assessment 68
- Authorization 69
- 5-6 Design Procedures 70
- 5-8 Design Procedures 72
- 5-10 Design Procedures 74
- MAC Overrides 76
- 5-14 Design Procedures 78
- User Overrides 80
- Assessment Design Procedures 81
- 5-18 Design Procedures 82
- 5-20 Design Procedures 84
- 5-22 Design Procedures 86
- 6. VLAN Configuration 88
- 7. Policy Role Configuration 88
- 8. Define NAC Access Policies 88
- Assessment Policy 90
- Quarantine Policy 91
- Inline NAC Design Procedures 92
- 7S4280-19-SYS Up to 2000 94
- 2S4082-25-SYS Up to 2000 94
- 5-32 Design Procedures 96
- Additional Considerations 97
- 5-34 Design Procedures 98
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