Bypassing NAC v2.0 - OSSIR

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Element DetectionQuestions to Ask• How does the <strong>NAC</strong> solution detects the presence of anew element?• Does element detection performed in real-time?• How does the information regarding the elementsresiding on the network stays current?En moyenne, 25% des éléments connectés sur unréseau local ne sont pas connus, pas détectés oumal identifiés…Combien de clients VMWare ? Où sont-ils ?Combien de PC protégés par un FW personnel ?Des PC hors domaine ?Que se cache-t-il derrière une fonction NAT ?Des éléments sans adresse IP ?
Element DetectionMethods• DHCP proxy• Authenticated DHCP (<strong>NAC</strong>-in-a-Box)• Broadcast listeners• Switch integration• 802.1x• Agent software• In-line devices• Out-of-band devices• Proprietary methods
Page 4 and 5: Introduction
Page 6 and 7: IntroductionThe Problem• An enter
Page 8 and 9: Introduction“My” NAC is not “
Page 10 and 11: Capabilities
Page 12 and 13: CapabilitiesNAC Functions• The fo
Page 14 and 15: CapabilitiesNAC Functions- Remediat
Page 16 and 17: Attack Vectors
Page 18 and 19: Bypassing NACBackground
Page 22 and 23: BasicsQuarantine• There are a var
Page 24 and 25: QuarantineQuestions to Ask• How d
Page 26 and 27: Enforcement• How is enforcement p
Page 28 and 29: End-point Compliance Assessment•
Page 30 and 31: End Point Compliance AssessmentAgen
Page 32 and 33: Bypassing NACExamples
Page 34 and 35: Bypassing NACExamples• The exampl
Page 36 and 37: DHCP ProxyArchitecture
Page 38 and 39: DHCP ProxyInformation Exchange
Page 40 and 41: DHCP ProxyWeaknesses• Detected el
Page 42 and 43: DHCP ProxyWeaknesses• Not able to
Page 44 and 45: Authenticated DHCPorDHCP In-a-Box
Page 46 and 47: DHCP In-A-BoxArchitecture
Page 48 and 49: DHCP In-A-BoxStrengths• Theoretic
Page 50 and 51: DHCP In-A-BoxRogue DHCP Server
Page 52 and 53: Broadcast Listeners
Page 54 and 55: Broadcast ListenersArchitecture: Ma
Page 56 and 57: Broadcast ListenersWeaknesses• So
Page 58 and 59: Broadcast ListenersWeaknesses• Un
Page 60 and 61: Switch IntegrationSNMP Traps
Page 62 and 63: SNMP TrapsWeaknesses• Must rely o
Page 64 and 65: 802.1x
Page 66 and 67: 802.1x• Exceptions- Hosts that do
Page 68 and 69: Architecture• Components- Cisco T
Page 70 and 71:
Cisco NAC FrameworkInformation Exch
Page 72 and 73:
Cisco NAC FrameworkWeaknesses• Wo
Page 74 and 75:
Cisco NAC Framework• Static Excep
Page 76 and 77:
Cisco NAC FrameworkWeaknesses• No
Page 78 and 79:
In-Line Devices
Page 80 and 81:
In-Line DevicesWeaknesses• No kno
Page 82 and 83:
In-Line DevicesWeaknesses• Not ab
Page 84 and 85:
Out-of-Band DevicesArchitecture
Page 86 and 87:
Out-of-Band DevicesWeaknesses• In
Page 88 and 89:
The End-Result• A (very) confused
Page 90 and 91:
Resources• Microsoft NAPhttp://ww
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Bypassing NAC v2.0 - OSSIR

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