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NAC Solution Components
Enterasys NAC Design Guide 1-5
EnterasysofferstwotypesofNACappliances:theNACGatewayapplianceimplementsout‐of‐
bandnetworkaccesscontrol,andtheNACControllerapplianceimplementsinlinenetworkaccess
control.ThefollowingsectiondescribeshoweachNACapplianceimplementsnetworkaccess
controlforconnectingend‐systems.
NAC Gateway Appliance
TheNACGatewayisutilizedtoimplementout‐of‐bandnetworkaccesscontrolforconnecting
end‐systems.WiththeNACGateway,connectingend‐systemsaredetectedonthenetwork
throughtheirRADIUSauthenticationinterchange.Basedontheassessmentandauthentication
resultsforaconnectingdevice,RADIUSattributesareaddedormodified
duringthe
authenticationprocesstoauthorizetheend‐systemontheauthenticatingedgeswitch.Therefore,
theNACGatewaycanbepositionedanywhereinthenetworktopologywiththeonly
requirementbeingthatIPconnectivitybetweentheauthenticatingedgeswitchesandtheNAC
Gatewaysisoperational.
TheNACGatewayrequirestheimplementation
ofintelligentwiredorwirelessedge
infrastructuredevicesastheauthorizat ion pointforconnectingend‐systems.Intelligentedge
devicesarecapableofsupportingauthenticationandauthorizationbasedontheauthentication
messageinterchange.Dependingontheappliancemodel,theNACGatewayprovideseither
integratedassessmentserverfunctionalityand/ortheabilityto
connecttoexternalassessment
services,todeterminethesecuritypostureofend‐systemsconnectingtothenetwork.
ThreeNACGatewaymodelsareavailabletomeettheneedsofdifferent‐sizedimplementa tions
andassessmentserverrequirements.
• SNS‐TAG‐ITAsupportsupto3000concurrentend‐systemsandprovidesintegrated
assessmentservers.(A
separatelicenseisrequiredforintegratedassessment.)Thisintegrated
NACGatewaysupportsbothagent‐less(network‐based)andagent‐basedassessment.In
additiontohavingthecapabilitytorunasanintegratedappliance,italsohasthecapabilityto
runasanassessmentserver(scanner)only.TheSNS‐TAG‐ITAalso
supportstheabilityto
connecttomultipleexternalassessmentserversincludingNessu sandLockdownEnforcer.
• SNS‐TAG‐HPAsupportsupto3000concurrentend‐systemsandsupportstheabilityto
connecttomultipleexternalassessmentserversincludingNessu sandLockdownEnforcer.
• SNS‐TAG‐LPAsupportsupto2000concurrentend‐
systemsandsupportstheabilityto
connecttomultipleexternalassessmentserversincludingNessu sandLockdownEnforcer.
NAC Controller Appliance
TheNACControllerisutilizedtoimplementinlinenetworkaccesscontrolforconnectingend‐
systems.WiththeNACController,connectingend‐systemsaredetectedthroughthereceiptofa
packetfromanewend‐system.Basedontheassessmentandauthenticationresultsfora
connectingdevice,theauthorizationoftheend
‐systemisimplementedlocallyontheNAC
Controllerappliancebyassigningasetoftrafficforwardingrules,referredtoas“policy,”toall
trafficsourcedbytheend‐system.TheNACControllerapplianceispositionedstrategicallyinthe
networktopologywithintheenduserLANsegmentoracrossroutedboundaries,
inlinewithdata
trafficsourcedfromend‐systems.Sincethisapplianceexistsinthedata pathofnetworked
devices,ithasbeendesignedtoachievemulti‐gigabitthroughputwithhardware‐basedtraffic
forwarding,byleveragingcustomizedEnterasys‐builtApplicationSpecificIntegratedCircuits
(ASICs).
TheNACControllerisapplicabletoscenarioswhere
non‐intelligentwiredorwirelessedge
infrastructuredevicesaredeployedinthenetwork.Non‐intelligentedgedevicesarenotcapable
- 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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