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Chapter 5. Solution design 107
For ABBC we set the parameter to 60 seconds. Effectively this forces the
posture status to refresh itself at every challenge. Figure 5-8 shows the
conceptual control flow for this parameter.
Figure 5-8 MAX_DATA_AGE_SECS conceptual flow
Client challenge
issued by network
access device
Posture
Cache
Is the cache
data more
recent than
MAX_DATA_AGE_SECS
parameter?
Run Posture
Collectors
No
Yes
Return cached
data
Refresh Cached Data
Response sent
to network
Network Access Device
- Building a Network 1
- Access Control Solution 1
- IBM Tivoli and Cisco Systems 3
- January 2007 3
- Second Edition (January 2007) 4
- “Notices” on page vii 4
- Contents 5
- Contents v 7
- Trademarks 10
- Network 11
- Admission Control 11
- Preface xi 13
- Become a published author 14
- Comments welcome 15
- Summary of changes 17
- Architecture 19
- Business context 21
- IBM Integrated 22
- Cisco Self-Defending Network 23
- Endpoint 23
- Compliance & Remediation 23
- 1.7 Conclusion 28
- Architecting the solution 31
- 2.1.1 Architecture overview 32
- Network Admission Control 33
- Security Compliance Manager 35
- Tivoli Configuration Manager 37
- Security policy 37
- Compliance query 37
- Compliance User Interface 38
- Remediation handler 38
- Quarantined 39
- Cisco NAC and IEEE 802.1x 40
- Using Cisco terminology 41
- Posture agent 42
- Network identity provisioning 42
- Remediation process 43
- Internet 45
- 2.3 Design process 46
- Creation 49
- Implementation 49
- 2.3.3 Solution objectives 50
- Default network 51
- Quarantine access 52
- Trusted network 52
- Performance controls 52
- 2.4 Implementation flow 53
- 2.6 Conclusion 55
- Component structure 57
- 3.1 Logical components 58
- Posture validation server 59
- Figure 3-2 ACS architecture 60
- Policy enforcement device 61
- Admission control client 61
- 3.1.2 Compliance 64
- Compliance client 66
- Posture collector 67
- 3.1.3 Remediation 69
- 3.2 Physical components 70
- Network access device 72
- Network Access Profiles 76
- Remediation (flow 4) 79
- 3.3.1 Secure communication 80
- 3.4 Component placement 81
- Figure 3-8 Security zones 82
- Controlled zone - intranet 84
- Other networks 84
- Branch office compliance 85
- Campus internal enforcement 86
- Branch Office Compliance 87
- (Campus Ingress Enforcement) 87
- SOHO Compliance 88
- (PAT access protection) 88
- Extranet compliance 89
- Lab compliance 90
- Data Center protection 91
- 3.5 Conclusion 92
- Customer 93
- Armando Banking Brothers 95
- Corporation 95
- 4.1 Company profile 96
- 4.2 Current IT architecture 97
- Uncontrolled zone - Internet 98
- Controlled zone - DMZ 98
- Controlled intranet 98
- Production network 98
- NAC Framework 98
- NAC Appliance 100
- Firewall 104
- Project overview 106
- 4.4 Conclusion 109
- Solution design 111
- 5.1 Business requirements 113
- 5.2 Functional requirements 114
- Remediation 117
- Production 117
- Compliance 117
- Security compliance criteria 118
- Remediation services 118
- 5.3.1 Logical components 120
- Enforcing compliance criteria 127
- Posture token 128
- Healthy indicates that the 132
- Performing remediation 133
- 5.3.2 Physical components 134
- Compliance subsystem 135
- Access Control Server 136
- NAC-enabled network device 138
- Layer 2 devices 138
- Layer 3 devices 138
- Cisco Trust Agent 139
- Remediation subsystem 140
- Software Package Web Server 140
- 5.4 Conclusion 141
- Figure 6-11, click Next 155
- English and click Next 159
- 6.2.1 Posture collectors 171
- 6.2.2 Policy collector 172
- Figure 6-34, click Next 177
- Figure 6-37 Policies view 180
- Rule operators 192
- Rule results 193
- Rule format 193
- TCMCLI utility policy 207
- 6.3.1 Cisco Trust Agent 208
- 6. Click Next (Figure 6-66) 214
- (Figure 6-71) 219
- 6.4 Conclusion 230
- Network enforcement 231
- Installing Cisco Secure ACS 233
- Configuring logging 244
- client 247
- Figure 7-16 AAA clients 251
- Figure 7-18 AAA Clients 253
- Configuring RADIUS attributes 254
- Configuring groups 255
- Figure 7-21 Group Setup 256
- Configuring users 257
- Internal Database 258
- Global authentication setup 259
- (Figure 7-24 on page 241) 260
- 6. Click Submit + Restart 261
- To do this: 262
- Token (APT) of 268
- Figure 7-33 on page 251 268
- (Figure 7-33) 269
- Figure 7-35 271
- 12.Click Done 271
- 27.Click Done (Figure 7-44) 280
- Allow any Protocol 289
- Grant access 290
- NAC_IISSCN_Posture_Profile 292
- Healthy PA message: 294
- 24.Click Submit 300
- External User Database 301
- Unknown user policy 301
- Clientless user 301
- Figure 7-64 Naming of ACL 303
- 7. Click Submit 304
- Figure 7-66 Binding the ACL 305
- Router# 321
- 7.2.1 Installing CCA Agent 322
- The steps are: 325
- (Figure 7-77) 327
- Figure 7-82 Managed subnets 332
- Configure default login page 333
- Configuring a Switch Group 334
- 3. Click Add 335
- Configuring a switch profile 337
- Configuring Port Profile 338
- Configuring SNMP receiver 341
- Adding a managed switch 342
- IP Address box, and a 343
- Figure 7-94 Managed switch 344
- Defining user roles 345
- Creating traffic policies 347
- Access to TCM 349
- Creating local users 350
- Configure Clean Access Agent 352
- Figure 7-106 New rule 356
- Validity 358
- Figure 7-109 Requirements 359
- 26.Click Update 363
- Discovered clients 364
- Logging on as a client 365
- Continue 367
- 7.3 Conclusion 372
- 8.2.1 Prerequisites 376
- Figure 8-16 Welcome window 394
- is False) and click Next 401
- IISSCN Extension Pack2 for 404
- 8.3.1 Locating HTML 416
- Base HTML 418
- Posture item HTML 418
- HTML pages example 419
- Posture element HTML 420
- The wfattribute tag 421
- The field Tag 421
- The remattribute tag 422
- 8.3.3 Debug attributes 424
- Logging posture items 425
- Logging the HTML search path 426
- TCRNavScan workflow 436
- TCRNavVirusDefUpdate 441
- TCRNavSoftwareInstalled 443
- TCRMSPatchesInstallWinXP 444
- HotfixId 446
- TCRZLSoftwareInstalled 450
- TCRZLSoftwareRunning 452
- TCRMessengerDisabled 453
- 8.5 Conclusion 455
- Appendixes 457
- Hints and tips 459
- Deployment overview 460
- Top-level sequence of events 462
- Cisco NAC sequence of events 465
- Fault isolation 466
- SCM Push Client 468
- Tools and tricks 469
- Cisco IOS Software router 470
- Cisco IOS Software switch 470
- Cisco Secure ACS server 471
- NAC Appliance details 473
- In-band versus out-of-band 474
- NAC Appliance integration 475
- Integration design 476
- NAC Appliance Agent 477
- TSCMAgent.bat 478
- NACApplianceCompliance.entry 478
- Policy collector 478
- Scheduler 479
- System path 481
- Scheduler.bat 481
- NAC Appliance Manager 482
- State mapping and scenarios 483
- Conclusion 488
- Executive summary 490
- The benefit of NAC 490
- NAC implementation options 492
- The NAC Appliance 493
- NAC Framework solution 494
- Investment protection 494
- The next steps 496
- NAC technology 496
- NAC Framework components 497
- Additional material 499
- Using the Web material 500
- Related publications 501
- Online resources 502
- How to get IBM Redbooks 502
- Help from IBM 503
- Numerics 505
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