Architecting the solution | IBM Tivoli and Cisco instruction

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Chapter 2. Architecting the solution

In this chapter we discuss the solution architecture of the IBM Integrated Security Solution for Cisco Networks with its compliance-based Network Admission Control system. We provide an overview of the key modules and their relationship, and describe an approach for introducing this additional security layer into the enterprise IT environment.

© Copyright IBM Corp. 2005, 2007. All rights reserved.

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IBM Tivoli and Cisco manual Architecting the solution

Contents

Building a Network Access Control Solution Page International Technical Support Organization Second Edition January Contents Part 2. Customer environment Part 3. Appendixes Index Copyright License Vii IBM TrademarksAIX Preface Team that wrote this redbook Preface IBM US Become a published author Comments welcome Page New information January 2007, Second EditionChanged information Page Part 1 Architecture and design Page Business context Security compliance and remediation concept Why we need this Http//banking.senate.gov/conf Does this concept help our mobile users Business driver for corporate security compliance Corporate security policy defined Achievable benefits for being compliant Policy Development and Assurance Conclusion Business context Page Architecting the solution Architecture overview Solution architectures, design, and methodologies WAN Network Admission ControlPage Security Compliance Manager Page Compliance query Tivoli Configuration ManagerArchitectural terminology Security policy Remediation handler Compliance User InterfaceNetwork Admission Control process TCM ACS Cisco NAC and Ieee Authenticator Using Cisco terminologySupplicant Network identity provisioning Posture agent Remediation process Definition of a Network Admission Control project Phased rollout approach Internet Security compliance management business process Design process Architecting the solution Security policy life cycle management Implementation Creation Review and update Solution objectivesEnforcement Network design discussion Default network Trusted network Quarantine accessPerformance controls Scalability and high availability Implementation flowPage Conclusion Page Component structure Logical components Solution logical block diagram Network Admission Control Framework Network Admission ControlPosture validation server CSMon CSlog Admission control client Policy enforcement device Posture plug-in Logging service Network Admission Control Appliance Clean Access Manager CAMClean Access Server CAS Clean Access Agent CAA Compliance Clean Access Policy UpdatesCompliance server Compliance reporting Administration Compliance client Compliance client logical component Posture collector Policy collector Posture cache Default remediation handlerRemediation Remediation server Network client Physical componentsRemediation handler component Security Compliance Manager client Cisco Trust AgentSecurity Compliance Manager policy Cisco Secure Access Control Server Network access infrastructureIBM Integrated Security Solution for Cisco Networks servers Network access device Tivoli Configuration Manager servers Solution data and communication flow Policy Policy creation and deployment flow Component structure Posture collection process flow Posture validation and policy enforcement flow Page Remediation flow Secure communication between components Secure communication Security Compliance Manager communication Component placementSecurity zones NAC communication Less Secure Network Uncontrolled zone Internet, external networks Restricted zone management network Controlled zone external network-facing DMZControlled zone intranet Restricted zone production network Branch office compliance Policy enforcement pointsBranch egress enforcement Campus internal enforcement Branch Office Compliance Campus Ingress Enforcement Small Office Home Office compliance Soho Compliance PAT access protection Extranet Compliance Extranet compliance LAB Compliance Lab compliance Data Center Protection Data Center protection Remote Access Protection Remote access protection Part 2 Customer environment Page Armando Banking Brothers Corporation Company profile Network infrastructure Current IT architecture IBM Integrated Security Solution for Cisco Networks lab Armando Banking Brothers Corporation NAC Appliance Armando Banking Brothers Corporation Page Application security infrastructure DMZ Middleware and application infrastructure Corporate business vision and objectives Project layout and implementation phases Action Reference Part I Security compliance server Project overview NAC L3 IP NAC L2 IP Part III Remediation server CCA OOB VG Conclusion Page Solution design Page Business requirements Functional requirements Network access control requirementsSecurity compliance requirements Remediation requirements Solution functional requirements Caused by worms and other hostile software NAC solution conceptual functional requirements Security compliance criteria Remediation services Attempt Implementation architecture Logical components Component subsystems total solution Establishing compliance criteria Configuring the compliance server Tivoli Security Compliance Manager client components Establishing the policy collector parameters Solution design Setting the policy version Maxdataagesecs conceptual flow Setting the remediation handler URL attribute Enforcing compliance criteria 11 Setting the remediation handler JAR classpath ACS Posture token 13 Posture validation policies Page 14 Shared Radius Authorization Components Assigning the System Posture Token Performing remediation Remediation handler Html pages Physical components IBM Security Compliance Manager server Compliance subsystem Network Admission Control subsystem Access Control ServerIBM Tivoli Security Compliance Manager client Solution design LRE NAC-enabled network deviceLayer 2 devices Layer 3 devices Cisco Trust Agent Remediation subsystem IBM Tivoli Configuration Manager serverSoftware Package Web Server Conclusion Page 125 Compliance subsystem implementation Installation of DB2 database server Tivoli Security Compliance Manager setup 127 DB2 installation welcome window DB2 version selection is presented similar to the one shown 129 Setup wizard welcome window License agreement window 131 Installation type selection window Installation action selection window 133 Installation folder selection window User information dialog 135 Administration contact list dialog 10 DB2 Instance configuration window 11 DB2 Tools selection dialog 137 12 Administrator contact selection window 139 13 Installation options summary 14 Installation completion window Installation of Tivoli Security Compliance Manager server 15 Language selection dialog 141 Database Configuration Administration UtilitiesServer 143 18 Setup type selection window 19 E-mail server configuration dialog 145 20 Server Communication Configuration window Server Security Configuration window is displayed, as shown 22 Database Location selection window 147 23 Database configuration information 24 Database creation choice window 149 25 Administrator User ID Configuration window 151 26 Installation options summary window 27 Installation result window Configuration of the compliance policies Posture items and posture elements Posture collectors153 Workflow Policy collectorPosture collector parameters Operational 155 Installation of posture collectors 28 Tivoli Security Compliance Manager GUI login 157 30 Tivoli Security Compliance Manager Administration Console 32 Import file selection dialog 34 Collectors signature validation 159 35 Policy installation summary 161 Customization of compliance policies 37 Policies view 163 38 Collectors configuration view Faillastscanover PassversionWarnversions Versionwf Warndefsolderthan 165Defswf Warnmaxageover WarnminlenunderFailminlenunder Minlenwf 41 Editing collector parameters 167 Warnwindowsnt PasswindowsntPASSWINDOWS2000 169 Failhotfixes WarnhotfixesHotfixwf KEY 171 Pass NokeyruleValue Novaluerule 173 Rule operators Rules 175 Checking for ZoneAlarm installation directoryRule results Rule format Checking for Windows XP firewall forced off 177 Reqservice Reqrunning ServicerunningwfReqdisabled Servicedisabledwf 46 Copying an existing compliance query 179 47 Destination policy selection dialog 48 Renaming compliance query 181 49 Compliance query description modification 50 Violation message modification 183 51 Disabling collector sharing 53 Saving changes made to the policy collectors 185 54 Save policy collectors warning Assigning the policy to the clients 55 Create group action selection 187 57 Add policy menu selection Tcmcli utility policy Deploying the client software189 Prerequisites Cisco Trust Agent 61 Certs directory with CTA 191 62 Cisco Trust Agent installation wizard Installation of Cisco Trust Agent on Windows 63 License agreement for Cisco Trust Agent 193 Accept the defaults -64and click Next 195 65 Cisco Trust Agent installation type Click Next Figure 67 Confirmation of the certificate import 197 Click Finish to close the installation, as shown in Figure 199 IBM Tivoli Security Compliance Manager client 70 Language selection Installation of the Security Compliance Manager client 71 The welcome window 201 72 Client Installation Utility window 203 74 Directory selection window 205 75 Setup type window Pull Accept the defaults and click Next 77 Client connection window 207 78 Server communication configuration window 209 79 Client Dhcp configuration window Next 81 Successful completion window 211 82 Security Compliance Manager posture plug-in files 213 Network enforcement subsystem implementation Configuring the Cisco Secure ACS for NAC L2 Configuring NAC Framework components 215 Installing Cisco Secure ACS Configuring the administrative interface to Cisco Secure ACS 217 Interface configuration advanced options Administration control Allowing administrator access via Http optional 219 Cisco Secure ACS certificate setup Using an ACS self-signed certificate Generating self-signed certificate 221 Restart the Cisco Secure ACS Figure 223 Importing IBM Security Compliance Manager attributes Example 7-1 Security Compliance Manager attributes Example 7-2 Import Security Compliance Manager attribute 225 Click CSV Passed Authentications Figure Configuring logging 227 Select CSV Failed Authentications Figure 11 Failed attempts logging 229 Configuring a network device group in Cisco Secure ACS 13 Interface Configuration screen for the creation of NDGs 14 Network Device Group check box 231 15 Network Configuration 16 AAA clients 233 17 AAA client setup 18 AAA Clients 235 19 Global Ietf Radius attributes Configuring Radius attributes 237 Configuring groups 21 Group Setup 239 Configuring users 23 User-to-Group mappings Click Submit + Restart Global authentication setup241 EAP-FAST configuration Condition EAP-GTC 243EAP-TLS 26 Posture Validation Configuring posture validation 27 Posture Validation Policies 245 28 CTA Posture Validation Policy 29 Posture Validation for CTA 247 Click Add Condition Set Figure 31 Adding a condition set 249 32 Posture validation rule creation for CTA check 33 CTA rule defined 251 34 Quarantine condition applied as default action 35 Completed posture validation for CTA 253 Click Apply and Restart, as shown in Figure 37 Repeating the process for Security Compliance Manager 255 38 IBM Tscm policy creation 39 IBM Tscm policy creation 257 Click Add Rule to get to the screen shown in Figure 41 Tscm policy components 259Page 261 Click Done Figure 45 Completed posture validation rules 263 Click Radius Authorization Components Configuring Radius Authorization Components Ietf 265 47 IOS RAC attribute 48 Ietf drop-down menu 267 49 Healthy Sales RAC 269 Tunnel-Medium-Type 802 Click Add Profile Configuring Network Access Profiles271 51 Newly created NAP 273 52 Authentication configuration for RAC From the screen shown in -53,click Add Rule 275 54 Partial configuration of posture validation 55 Selecting CTA and Tscm policies 277 An example of the CTA Healthy pop-up is shown in Figure 58 CTA pop-up configuration 59 Completed posture validation for Naciisscn 279 60 Authorization rule creation User group System posture token Shared RAC 281 RAC 62 Completed Authorization RAC configuration Clientless user Configuring the Cisco Secure ACS for NAC L2/L3 IPExternal User Database Unknown user policy 63 Downloadable ACL creation Downloadable Access Control Lists 64 Naming of ACL 285 Enter the name of the ACL and the ACL definition Figure 287 Select Radius Authorization Components Vendor Attribute Value 289 Click Add Rule 68 L2IP Healthy Authorization rule Click Apply and Restart Deployment of the network infrastructure291 Configuring Cisco 3750 switch for NAC L2 293 Page 295 Configuring Cisco 3750 switch for NAC L2 IPPage 297 Has been applied to the switchport No URL Redirect Configuring Cisco IOS Router for NAC L3 IP 299 Page 301 Verifying Network Admission Control Example 7-3 Output of show eou and show eou all command 303 Configuring NAC Appliance components 71 Installation wizard Installing CCA Agent 305 72 Default install directory CCA version Required ports Configuring a CCA OOB VG server 307 75 CAM login Clean Access Summary window will be displayed Figure 77 Device Management 309 78 Adding a new CAS Click Add Clean Access Server 79 Successful CAS addition 311 80 CAS Status screen 81 Network IP screen 313 82 Managed subnets Select Advanced → Vlan Mapping Click Administration → User Pages → Login Configure default login315 Select Switch Management → Profiles → Group → New Configuring a Switch Group 317 85 Switch Group creation Verify your new switch group Figure 319 Configuring a switch profile 88 Switch profile Configuring Port Profile 321 Select Switch Management → Profiles → Port → New Figure 90 Managed profile creation Click Switch Management → Profiles → Snmp Receiver Configuring Snmp receiver323 Select Switch Management → Devices → Switches → New Adding a managed switch 325 93 Manually adding a switch to be managed As seen in -94,click the Ports icon Click User Management → User Roles → New Roles Defining user roles327 Click Save Role when completed Click User Management → User Roles → Traffic Control → IP Creating traffic policies329 98 Rules for trusted to untrusted Click Add Policy ActionAllow StateEnabled CategoryIP ProtocolTCP331 Click User Management → Local Users → New Local User Creating local users 333 Click Create User 102 List of local users Configure Clean Access Agent 335 Click Add Check 104 CCA version compliance check 105 Rules check list check 337 Rule Expression Rule NameRule Description Operating System 107 CCA Compliance rule definition 339 Newly defined rules will be displayed Figure Click Add Requirement Click Requirements → New Requirements Figure341 110 CCA Agent update 343 Click Requirement Rules 112 CCA Compliance Requirement rule Click Role-Requirements 113 Role requirements 345 114 Viewing online users Discovered clients 347 Logging on as a client 117 Web page pop-up informing user about non-compliance Click Continue 349 118 Temporary access notification 120 Security Compliance Manager Compliance Report window 351 123 Successful login Configuring Cisco 3750 switch for NAC Appliance 353 Example of interface configuration for CAM interface Example of Snmp configuration 355 Remediation subsystem implementationPage 357 Automated remediation enablement Prerequisites Remediation server software setup Tivoli Configuration Manager Web Gateway setup Tivoli Configuration Manager359 Installation of the DB2 database Preparing for the installationInstallation of Web infrastructure WebSphere Application Server launchpad 361 WebSphere Installation Wizard window Software License Agreement window 363 Installation type selection Component selection dialog 365 Destination folder selection window Node name selection window 367 Run as a service selection window 369 Installation options summary 10 Online registration dialog 371 Patching WebSphere Application Server installation 12 WebSphere product location 373 13 Installation option selection 14 Fix packs directory location Creating the necessary user account 375 Installation of Tivoli Configuration Manager Web Gateway Welcome window is presented -16. Click Next 17 License agreement window 377 18 Component selection 379 19 Installation directory selection window 20 Database configuration window 381 21 Web infrastructure configuration window 22 Endpoint configuration window 383 23 Secure access configuration 24 Summary of installation options 385 Configuration of the remediation server Installation of Software Package Web Server 387 26 WebSphere administrative console login 27 Install new application 389 28 Preparing for the application installation 29 Installation option summary dialog 391 30 Installation status window 31 Saving the configuration changes 393 Configuration of the Software Package Web Server Installation of the Software Package Utilities 395 Cd %BINDIR% Cd tcmremed\cfg Sputilinitialsetup.bat 397 Creating remediation instructions for the users Locating Html 33 Directory structure for Html pages 399 Base Html DefaultlangPosture item Html 401 Html pages example Posture element Html Variables and variable tags Field Tag Wfattribute tag403 Fail Remattribute tag \PROGRA~1\IBM\SC 405 Logging available attributes Debug attributes 407 Logging posture items Logging the Html search path 409 Creating Html pages for Abbc policy Example 8-4shows the Html source code for this 411 Example 8-5 Content of style definition filePage 413 Example 8-6 Html source for password length policy details Wfattributecurrentvalues.brbWARNING fieldmsg/bbr 415 Example 8-7shows the Html source forPage 417 Building the remediation workflows TCRNavScan workflow 419 Example 8-8 Content of NavScanMessageen.wsf Example 8-9 Content of Sample.properties file for TCRNavScan 421 38 Remediation handler interface with the warning 423 TCRNavVirusDefUpdatePage 425 TCRNavSoftwareInstalled TCRMSPatchesInstallWinXP 427 HotfixId=KB896423 TmfWebUIEndpoint=tcmweb 429 TCRMSServicePackInstallWinXpSp2Page AddRegistryValueBeforeExecData.arrayLength=2 431 TCRZLSoftwareInstalled 433 Noreboot TCRZLSoftwareRunning 435 TCRMessengerDisabled Modification of the remediation packages 437 Page 439 Part 3 AppendixesPage 441 Appendix A. Hints and tips Deployment overview Appendix A. Hints and tips 443 Top-level sequence of events Figure A-2 Isscn top-level sequence diagram Cisco Trust Agent Security Compliance Manager and NAC compliance subsystem Cisco NAC sequence of events Figure A-4 Cisco NAC sequence diagram Fault isolation Appendix A. Hints and tips Tivoli Security Compliance Manager Server Security Compliance Manager server and client Cisco NAC Summary of default port usageTools and tricks Communication port usage Cisco IOS Software router Cisco IOS Software switch Cisco Secure ACS server Tools and tricks for the client 40500 Cisco NAC Appliance components NAC Appliance details In-band versus out-of-band NAC Appliance integration Integration design NAC Appliance Agent Integration components NACApplianceCompliance.entry TSCMAgent.bat Kickrich.html Scheduler Installing and configuring prototype integration components Scheduler.bat System path NAC Appliance Manager Considerations for designing a production solution State mapping and scenarios Page Appendix A. Hints and tips Page 43 Sequence of Events for Scenarios #5 and #6 Conclusion 471 Appendix B. Network Admission Control Benefit of NAC Executive summary 473 Dramatically improve network security NAC implementation options 475 NAC Appliance Investment protection NAC Framework solution 477 Planning, designing, and deploying an effective NAC solution NAC technology Next stepsNAC Appliance components 479 NAC Framework componentsPage 481 Locating the Web material How to use the Web material Using the Web material Other publications IBM Redbooks483 Online resources How to get IBM Redbooks Help from IBM IBM Support and downloads IBM Global ServicesPage 487 Numerics SCM client communication Html Glba NAD NAC Creation Deployment PPP Sarbanes-Oxley Act URL UDPVlan Page Page Page Building a Network Access Control Solution