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HP Access Control Client Software manual Determine the Number of Radius Servers

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Designing Access Controls

Choose RADIUS Servers

In addition, the same network administrators control the policies at all sites. Policies should be centralized, so network administrators consider using either the multi-site fully centralized option or the multi-site distributed AAA with centralized policies option.

To choose between the two options, the PCU network administrators pose the second question: are they concerned with minimizing traffic on WAN links? They decide that they are; the university WAN has some trouble with conges- tion already. Therefore, the network administrators choose the multi-site distributed AAA option rather than the fully centralized option.

Table 3-70 shows the results when PCU network administrators factor their selections for both the component combination and access control architecture.

Table 3-70. RADIUS Server Locations for PCU

Access Control	Access Control	RADIUS Server	RADIUS Server	Credential	Credential
Component	Architecture	Devices	Location	Repository	Repository
Combination					Location
General	Multi-site	NAC 800s	One or more at	Directory service	Central site
	distributed AAA		each site
	with centralized
	policies

Determine the Number of RADIUS Servers

You should now know which devices should provide RADIUS services and store credentials. You have also determined at which sites, in a multi-site network, the RADIUS servers should be located. Next, determine the number of servers that you must deploy.

Generally, it is best practice to use as few RADIUS servers as possible, and as you learned in the previous sections, centralizing policies is often desirable. However, your network might require multiple RADIUS servers for several reasons.

Providing Redundancy. Your network should have at least two RADIUS servers so that users can continue to log in even if a RADIUS server, or the connection to a RADIUS server, fails. If you have chosen an architecture that deploys RADIUS servers at each site, you might build in redundancy at each site.

Improving Performance. You must ensure that your RADIUS server can handle the number of authentication requests that it receives.

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HP Access Control Client Software manual Determine the Number of Radius Servers, Radius Server Locations for PCU

Contents

ProCurve Solutions Page ProCurve Access Control Security Applicable ProCurve Products Contents Customer Needs Assessment Evaluate the Existing Network Environment Designing Access Controls Endpoint Capabilities and Administrative Control Page Appendix a Glossary Index Page Page Page Contents Access Control ConceptsAccess Control Concepts Introduction to Access Control Network Access Control Access Control Concepts AAA Network Access Control TechnologiesAuthentication Authorization T e NAS ID AccountingEndpoint Network Access Control ArchitecturePolicy Enforcement Point PEP Policy Decision Point PDP Access Control Concepts Policy Repository Network Access Control Architecture Network Access Control ProcessMAC-Auth Authentication-Based Network Access Control MethodsIntroduce security vulnerablities MAC-Auth Process Web-Auth Web-Auth Process 802.1X 802.1X Process Authentication Requirements Authentication ProtocolsMAC-Auth-None PAP EAP MS-CHAPv2Access Control Concepts Access Control Concepts Radius NAS ID 802.11 Wireless AuthenticationT e Dynamic WEP Static Wired Equivalent Privacy WEPWPA/WPA2 VLANs Access Control Rights-Dynamic SettingsDevices ACLs Endpoint Integrity Policies Endpoint IntegritySecurity Settings Pre-connect and Post-connect TestingSoftware Operating SystemTesting Methods Access Control Concepts Endpoint Requirements for Integrity Checking WMI Quarantine Methods Endpoint Integrity PostureUser’s assignment and places him or her in a quarantine Vlan T e ProCurve NAC NAC 800 as an Endpoint Integrity Only SolutionProcess for 802.1X Quarantining Endpoint Integrity Only. 802.1X DeploymentWith each other Dhcp Deployment T e IP address = 192.168.8.1/24 IP address = 192.168.9.1/24 Inline Deployment Method NAC 800 as a RADIUS-Only Solution NAC 800 as Both a Radius Server and an Endpoint Integrity SolutionAccess Control Concepts User Authenticates and Is Placed in the Test Vlan Access Control Concepts User Re-authenticates and Is Placed in the Appropriate Vlan Wlan ProCurve IDMIAS, and the IDM agent on the same Windows Server Radius Process with IDM Customer Needs Assessment Customer Needs Assessment Overview Customer Needs Assessment Employees Types of UsersGuests Temporary EmployeesNetwork Skills Network Users Recording Information about UsersWireless Connections Wired ConnectionsTypes of Connections Remote Connections Group Permitted Connections Access Times Network ResourcesRecording the Types of Connections Available to Users Access Control Zones Wireless and Wired Zones Access Control Zones Customer Needs Assessment Determine Risk Tolerance Regulations Federal Information Security Management Act Quantify Your Company’s Risk Tolerance Regulatory ComplianceAttack Vectors Vulnerability to AttacksExternal Attacks Internal AttacksTypes of Attacks Malware Viruses and Worms Customer Needs Assessment Customer Needs Assessment Size Evaluate the Existing Network EnvironmentEdge Devices Switch Vendor Firmware Location Recording Information about Network SwitchesPort Mirroring Model Number Version Supported Monitoring SpanningAP as a Supplicant Workstations and Laptops EndpointsRecording Information about APs Customer Needs Assessment Recording Information about Workstations and Laptops Other EndpointsLaptop or Quantity User Operating Applications Workstation System NetworkRadius Servers Directory ServiceRecording Information about Other Endpoints Routing Information Subnets and VLANsDchp Servers Sample Network Diagram Network DiagramBrowser Security Policy-Windows Determine Your Endpoint Integrity RequirementsCustomer Needs Assessment Default Settings for Internet Explorer Zones Select Security Settings for Your CompanyZone Default Setting Security Settings-Windows Security Settings-OSOperating System-Windows Software-Windows Control over Network Resources Human FactorUsers’ Cooperation IT Department WorkloadCustomer Needs Assessment Customer Needs Assessment Designing Access Controls Designing Access Controls Endpoint Capabilities and Administrative ControlSelect an EAP Method for 802.1X 106 Comprehensive Security Policy Components Designing Access Controls Example Network Process of Designing Access Control SecurityDiagram of the PCU Campus Designing Access Controls PCU Campus Zones Network Infrastructure Divided into Access Zones Advantages and Disadvantages of Access Control Methods Choose the Access Control MethodsHigh Endpoints that accessHigh effort to Security Concerns by Zone Network Access Zones SecuritySecurity Zone Private Public Wired Zone Security Concerns WEP Wireless Zone Security ConcernsWPA/WPA2 Tkip CCMP-AES Wireless SecurityWeb-Auth None by default Do your endpoints have 802.1X supplicants? Vulnerability and Risk Tolerance Technical Knowledge Characteristics Selecting an Access Control Method Based on Security NeededUser Type and Sophistication ExampleMAC-Auth Web-Auth 802.1X Access Control Method by User Sophistication LevelAccess Control Method by User Type and Sophistication Administrative WorkloadEndpoint Compatibility of Access Control Methods Access Control Method by Administrative WorkloadHardware Type of Interface Operating System 10. Configuration of PCU’s Endpoints11. Access Control Method by Endpoint Capabilities Administrative Control over Endpoints13. Access Control Method by Administrative Control Level 12. Administrative Control LevelsDescription Switch Series MAC-Auth Web-Auth 802.1X 14. Authentication Method by Administrative ControlNetwork Infrastructure Devices 17. Access Control Method by Existing Infrastructure New capabilities for these wireless productsProCurve Product Software Version MAC-Auth Web-Auth 802.1X Network Infrastructure Devices as 802.1X Supplicants Bringing All of the Factors Together ProCurve Switches 802.1X SupplicantThem 19. Access Control Methods by FeasibilityFactor Weight Private Wired Public Wired 20. Preliminary Decisions for the Access Control Method21. Preliminary Decisions for the Access Control Method 22. Access Control Methods for Each Zone Make Decisions about Remote Access VPNZone Access Control Method 23. Disadvantages of Remote Access Decide Whether to Grant Remote AccessDisadvantages Mitigating Factors Select VPN Options 24. Advantages of Remote AccessAdvantages Explanation 25. Options for VPN Protocols DSA Vulnerability and Risk Assessment26. Selecting VPN Options Based on Security Needs They have? Router or firewall Administrative Workload and IT Budget Designing Access Controls Native Capabilities With VPN Client 29. Endpoint Compatibility for Remote Access30. Selecting VPN Options Based on Endpoint Existing Network InfrastructureBringing All Factors Together 32. Preliminary Decisions for VPN Options 33. PCU’s Preliminary Decisions for VPN Options Choose the Endpoint Integrity Deployment Method Access Control MethodMAC-Auth Vulnerability to Risks and Risk Tolerance 35. Deployment Method by Access Control MethodDesigning Access Controls Public Wireless Remote Factor Private Wired Public Wired36. Security Level of Deployment Methods 37. Deployment Method by SecurityConnection Type Wireless38. Deployment Method by Existing Network Infrastructure Bringing the Factors Together Wireless Connection type Inline39. Deployment Method by Connection Type 42. Deployment Method by Zone Factor Weight Private Wired Public Wired Remote WirelessZone Deployment Method 43. Summary of Testing Methods Choose Endpoint Integrity Testing MethodsTesting Method Advantages Disadvantages NAC EI Agent Requirements for Testing MethodsInstallShield Wizard for the NAC EI Agent Requirements for ActiveX Testing Advantages and Disadvantages of NAC Agent TestingActiveX Agentless Advantages and Disadvantages of ActiveX TestingRequirements for Agentless Testing Deciding Which Testing Methods to EnableAdvantages and Disadvantages of Agentless Testing Transparent Testing Designing Access Controls Testing methods Testing with User InteractionDesigning Access Controls Administrative Control over Endpoints Factors to Consider for Testing Methods45. Testing Method by Administrative Control 44. Testing Method by Control over EndpointsFactor Public Wired Private Wired Private Wireless Remote46. Testing Methods by Post-Connect Testing Post-Connect TestingUser Sophistication 47. Testing Method by Post-Connect Testing49. Testing Methods for User Sophistication 48. Testing Method by User SophisticationPrivate Remote Wireless 50. Testing Methods by Administrative Workload Administrative WorkloadAgentless ActiveX NAC IE Agent Network Overhead 51. Testing Methods for Administrative Workload53. Preliminary Decisions for Testing Methods 52. Testing Method by Network OverheadFactor Public Wired Bringing All of the Factors Together54. Preliminary Decisions for Testing Method Choose Radius Servers Network Authentication ArchitectureChoose Which Devices Will Play the Role of PDP Radius Servers in a Network Without Endpoint Integrity56. Integrated Server Combination 55. General Combination57. Integrated Server/Proxy Combination 58. Turnkey Server61. Alternate Integrated Server/Proxy Combination 60. Fully Integrated CombinationPEPs with Built-in PDPs PEPs with Built-in PDPs and Policy/Credential RepositoriesUsers Combination Wired Per LAN Wireless Per LAN Total WAN 65. Access Control Component Combinations 64. Scalability of Access Control Component CombinationsMost Scalable Least ScalableChoose an Access Control Architecture Designing Access Controls 67. Radius Server Locations Centralizing Policies 68. Radius Server Locations Eliminating Inter-Site Traffic 69. Radius Server Locations Reducing Inter-Site Traffic 70. Radius Server Locations for PCU Determine the Number of Radius ServersChoose Your Radius Servers and Finalize the Plan Radius Server Decision Tree Designing Access Controls Does your organization already use IAS for other functions? IAS as the Radius ServerNAC 800 as the Radius Server 72. Integrated Server/Proxy for the NAC 71. General Combination for the NAC73. Turnkey Server Combination for the NAC Wireless Edge Services Module Database Designing Access Controls IDM Overview Add ProCurve IDMDetermine If You Need IDM Design Parameters for a Network with IDM Add Users Create Access Policy GroupsSelect an EAP Method for 10. EAP Method Decision FlowchartDesigning Access Controls Supplicant 75. EAP Methods Supported by 802.1X SupplicantsEAP-TNC EAP-LEAP Not 76. EAP Methods Supported by Radius ServersServer Designing Access Controls User Groups and Policies Finalize Security Policies77. Final Security Policy by Zone 78. Example Security Policy by ZoneAccess Group Policies with IDM Access Profile 79. Access ProfilesAccess Profiles 80. Dynamic VLANs81. Dynamic VLANs for PCU 83. Resources 82. Resources by Entire VlanResource Vlan ID Subnet Address Resource IP Address Protocol85. PCU Resources 84. PCU Resources by VlanAccess Profile Resources 86. Resources Allowed in Access ProfilesAccess Profile Resource 87. Resources Allowed in PCU Access ProfilesFaculty Web servers, white pages Library catalog and printer Resources Rate Limit QoS 88. Resources Allowed in Access Profiles90. Sample Access Policy Group Rules for PCU 89. Access Policy Group RulesAccess Policy Inputs Group Location Time System Outputs-Access ProfileAccess Policies without IDM Attribute Explanation Value for My Policy 91. Radius Attributes in Access Requests93. Dynamic Settings for My Policies 92. Authentication Protocols for My PoliciesAttribute Policy 1-Setting Policy 2-Setting Design NAC Policy Groups Create the NAC PoliciesDesign NAC Policies 95. Tests for Minimal Endpoint Integrity 94. Tests for Minimal Endpoint IntegrityAnti-Virus Anti-Spyware Personal Firewalls Mac Firewall 96. Tests for Medium Endpoint IntegrityBrowser? Enter the required versions in Table 97. Web Browser Tests Test Settings Mozilla Firefox99. Other Tests for Hotfixes 98. Macro Security TestsMicrosoft Excel Microsoft Outlook Windows Media Mac QuickTime IIS101. Tests for Applications 100. Windows Automatic UpdatesOptions Your selection 103. Tests for Shared Connections 102. Tests for Services104. Tests on Mac Airport Windows Bridge Network Connection Mac Internet SharingSpecified as allowed Core Resources Lay Out the Network105. Test for Windows Startup Registry Entries T e Public Wired Zone Access Zones for EndpointsVlan Assignment and Other Dynamic Settings. You can set up 133 106. Public Wired Zone Policies108. Public Wireless Zone Policies Public Wireless ZoneDesigning Access Controls Product Software Version Radios Modes WLANs 109. Capabilities of ProCurve Wireless ProductsEAP Method for Software AuthenticationVersion Methods 802.1X 112. ProCurve Products That Support PoE 111. PoE Requirements on ProCurve RPs and APsLay Out the Network 113. Private Wired Zone Policies Private Wired ZoneMight otherwise be ignored 115. Private Wireless Zone Policies Private Wireless ZoneMS-CHAPv2 Remote Zone Designing Access Controls Number Module VPN Protocol Maximum EncryptionTunnels 3DESAdjacent Zones Combining Access Control Zone DesignsOverlapping Zones 117. VPN Capabilities of the ProCurve VPN ClientDesigning Adjacent and Overlapping Zones Integrating all Parts of the Network Design Adding Access Control to an Existing NetworkMigrating from One Solution to Another 150 ProCurve Elite Partners Services and SupportOther Resources ImplementationElements Solution Elements of Each Access Control SolutionOther Resources Numeric Appendix a GlossarySee also Dhcp deployment method and inline deployment method Appendix a Glossary Access point See APAgent See NAC EI agent Appendix a Glossary Appendix a Glossary Appendix a Glossary Digital certificate See certificate EI See endpoint integrity Enforcement See ES. server Extensible See EAP Authentication Protocol GTC See EAP-GTCInline quarantine method Appendix a Glossary Management See MS. server Lightweight See LDAP. directory access ProtocolMirroring, remote See remote mirroring Appendix a Glossary Appendix a Glossary Permanent agent Peer-to-peerPoE Pre-shared key See PSK Posture See integrity posturePublic key See PKI. infrastructure Radio port See RP Remote procedure See RPC. call Appendix a Glossary Appendix a Glossary Appendix a Glossary Appendix a Glossary Html Appendix a Glossary Appendix a Glossary Index See DNS EAP … 1-21, 1-25, 1-53 EAP GTC … See Imsi OS-X See SOX security policies TLS See WEP Contents Contents Overview ProCurve Access Control Solution Enhancements to the ProCurve Access Control Solution ProCurve NAC Deep Check TestingSMB Signing Integration with Microsoft SMS Post-Connect NAC TestingSupport for Rdac Dhcp Plug-in Deployment Better synchronization with Microsoft Active Directory Identity Driven ManagerProCurve Access Control Solution NAP Components Microsoft NAPNAP enforcement point NAP clientNAP health policy server NPS Active Directory domain serviceHealth requirement servers Restricted networkNAP Enforcement Clients ECs NAP Client ArchitectureSystem Health Agents SHAs NAP AgentFigure A-4. Client-Side NAP Architecture NAP Server ArchitectureTable A-2. NAP ECs and Corresponding NAP Enforcement Points NAP Enforcement PointNAP Enforcement Point Health Requirement Servers Network Access MethodsIPsec Figure A-5. IPsec-Protected and Unprotected Communications Figure A-6. HRA Network Access Dhcp 802.1X Authentication VPN AccessFigure A-9. Ieee 802.1X Network Access Remediation and Health Requirement Servers Updating the Access Control Design Process Existing Network Environment Choose the Endpoint Integrity SolutionExisting Network Environment Option Vulnerability to Risks and Risk ToleranceRisk Tolerance Management ResourcesInteroperability Requirements Bringing the Factors Together Factor Weight SelectionInteroperability Option Requirements Choose the Endpoint Integrity Deployment Method Updating the Access Control Design Process Updating the Access Control Design Process