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Chapter 10 Configuring system settings 539
Nortel Secure Network Access Switch 4050 User Guide
Removing an existing DNS server
To remove a DNS server from the system configuration, perform the following
steps:
1 Select the System > Servers > DNS Servers tab.
The DNS Server Table appears (see Figure 150 on page 537).
2 Select the DNS server to remove from the DNS Server Table.
3 Click Delete.
A dialog box appears for confirmation.
4 Click Yes.
The DNS server entry is immediately removed from the DNS Server Table.
5 Click Apply on the toolbar to send the current changes to the Nortel
SNAS 4050. Click Commit on the toolbar to save the changes permanently.
- Nortel Secure Network Access 1
- Switch 4050 User Guide 1
- Trademarks 2
- Restricted rights legend 2
- Statement of conditions 2
- Licensing 3
- Contents 5
- 24 Contents 24
- Text conventions 27
- Related information 28
- How to get help 29
- 30 Preface 30
- Chapter 1 31
- Elements of the NSNA solution 32
- Supported users 32
- Role of the Nortel SNAS 4050 33
- Nortel SNAS 4050 functions 34
- Nortel SNA VLANs and filters 34
- Groups and profiles 35
- Authentication methods 36
- Chapter 1 Overview 37 37
- Communication channels 38
- About SSH 38
- Nortel SNAS 4050 clusters 39
- 40 Chapter 1 Overview 40
- One-armed configuration 41
- Two-armed configuration 41
- 42 Chapter 1 Overview 42
- Chapter 1 Overview 43 43
- 44 Chapter 1 Overview 44
- Chapter 1 Overview 45 45
- 46 Chapter 1 Overview 46
- Chapter 1 Overview 47 47
- 48 Chapter 1 Overview 48
- Chapter 2 49
- Initial setup 49
- About the IP addresses 51
- Chapter 2 Initial setup 61 61
- Extended profile details 61
- Joining a cluster 63
- Chapter 2 Initial setup 67 67
- Figure 3 69
- 70 Chapter 2 Initial setup 70
- Chapter 3 71
- > 77
- Manually adding a switch 78
- Figure 5 87
- The SSH Key menu displays 88
- /cfg/domain #/switch #/ena 91
- Add a Switch 92
- Add a Switch fields 92
- Table 4 95
- Mapping VLANs by domain 97
- Adding VLANs to a domain 98
- Removing VLANs from a domain 99
- Mapping VLANs by switch 100
- Adding VLANs to a switch 101
- Removing VLANs from a switch 102
- 320818-A 104
- Key Generation screen 105
- Switch SSH Key fields 106
- Figure 13 107
- Table 8 108
- Switch SSH Key screen 109
- Figure 15 112
- Table 11 114
- Switch Configuration screen 116
- Chapter 4 117
- Configuring the domain 117
- /cfg/domain 118
- Roadmap of domain commands 119
- <domain ID> 122
- Figure 17 Creating a domain 123
- The Trace menu displays 137
- SSL is enabled by default 142
- NSNAS-Portal-ID) 149
- Figure 19 152
- Add a Secure Access Domain 153
- Figure 21 155
- 6 Click Next 158
- Field Description 159
- Domain Quick Wizard – Server 160
- Domain Quick Wizard – Switch 161
- Figure 28 164
- Table 19 165
- Table 20 166
- Table 21 167
- Table 22 170
- Table 23 173
- Figure 31 174
- Table 24 175
- Figure 32 176
- Table 25 177
- Table 26 180
- Figure 34 182
- HTTP Redirect fields 183
- Figure 36 187
- 2 Click Add 187
- Figure 37 187
- Chapter 5 191
- Overview 192
- Default group 193
- Linksets 194
- TunnelGuard SRS rule 194
- Extended profiles 195
- Before you begin 196
- Figure 38 200
- Figure 40 205
- Figure 41 207
- Adding a group 210
- Adding a Group screen 211
- Add a Group fields 211
- Modifying a group 212
- Group Configuration fields 213
- Adding a client filter 214
- Adding a Client Filter screen 215
- 4 Click Apply 216
- Modifying a client filter 217
- Table 34 218
- Adding an extended profile 220
- Modifying an extended profile 222
- Mapping linksets to a group 224
- Adding linksets to a group 225
- Mapping linksets to a profile 227
- Adding a Linkset screen 228
- Add a Linkset fields 228
- AAA Configuration screen 230
- AAA Configuration fields 231
- Table 39 231
- Chapter 6 233
- Configuring authentication 233
- 1/aaa/group <group ID> 244
- The RADIUS menu displays 246
- The LDAP menu displays 253
- Figure 60 270
- Configuration 274
- Table 41 275
- Figure 63 276
- Table 42 277
- Radius Servers 279
- Adding a RADIUS server 280
- Removing a RADIUS server 281
- Next steps 282
- Modifying LDAP configuration 284
- Table 45 286
- Figure 68 287
- Table 46 288
- LDAP Servers 291
- Adding an LDAP server 292
- Removing an LDAP server 293
- Managing LDAP macros 294
- LDAP Macros 295
- Adding LDAP macros 296
- Reordering LDAP macros 297
- Removing LDAP macros 297
- Adding the Local method 299
- Populating the database 301
- Add a Local User 302
- Add a Local User fields 302
- Importing a database 304
- Modifying local users 307
- Figure 78 308
- Table 54 311
- Exporting the database 312
- Authentication Server Order 315
- Chapter 7 317
- TunnelGuard SRS Builder 317
- Configuring SRS rules 318
- Menu commands 319
- TunnelGuard Rule menu 321
- Tool menu 321
- SRS definition toolbar 322
- SRS Components table 323
- Customizing a component 324
- Memory snapshot 325
- SRS Rule list 326
- Available Expression list 326
- Rule Expression Constructor 326
- The New SRS window 328
- Selecting file on disk 331
- Creating logical expressions 333
- The New SRS Rule window 336
- Registry-based rules 338
- Supported integer operands 339
- Table 67 340
- Creating a registry entry 341
- Registry-based File/Module 342
- Manually creating SRS entries 343
- Create new OnDisk SRS Entry 344
- File age check 347
- Adding comments 348
- The Rule Comment window 349
- Deleting a TunnelGuard rule 350
- Deleting an expression 350
- Making API calls 351
- Chapter 8 353
- CLI configuration examples 360
- Old: is empty 362
- /cfg/cert) 364
- Changing passwords 366
- Changing your own password 366
- 2 Access the User Menu 368
- 4 Type the 368
- 5 Apply the changes 368
- Deleting a user 369
- User Table 371
- Adding new user accounts 372
- Add a User fields 373
- Figure 98 374
- Table 70 375
- Change Your Password 376
- Change Your Password fields 377
- Figure 100 378
- Change User Password fields 379
- Figure 101 380
- Adding a user group 382
- Removing a user group 383
- Chapter 9 385
- Exclude List 387
- Table 75 388
- Portal display 389
- Default appearance 390
- Language localization 392
- Linksets and links 394
- Autorun linksets 394
- Planning the linksets 395
- Automatic JRE upload 397
- Windows domain logon script 398
- Command Parameter 399
- /cfg/lang 403
- The Portal menu displays 406
- Enabling DNS capture 417
- DNS Capture screen 418
- DNS Capture fields 418
- Add DNS Domain 419
- Add DNS Domain fields 419
- Pre-defined Languages 421
- Viewing predefined languages 422
- Import/Export Definition 423
- Figure 110 425
- Language fields 426
- Configuring content 427
- Table 82 428
- Importing banners 430
- Import Banner fields 431
- Figure 113 432
- Color Settings fields 433
- Basics screen 435
- Basics fields 436
- Table 85 436
- Importing custom content 437
- Import Content fields 438
- Table 86 438
- Exporting custom content 439
- Export Content fields 440
- Creating a linkset 441
- Add a Linkset 442
- Modifying a linkset 443
- Linkset Configuration fields 444
- Links tab 446
- Figure 120 446
- Add a Portal Link — External 447
- Add a Portal Link fields 447
- Add a Portal Link — FTP 449
- Figure 123 451
- Table 92 452
- Figure 124 453
- FTP link Configuration fields 454
- Re Order Links screen 455
- Re Order Links fields 455
- Chapter 10 457
- Configuring system settings 457
- /cfg/sys 459
- Roadmap of system commands 460
- The System menu displays 464
- Viewing host information 469
- Managing NTP servers 476
- Managing DNS servers 479
- About RADIUS auditing 488
- Configuring RADIUS auditing 489
- Figure 126 496
- System Configuration fields 497
- Figure 128 499
- Host fields 500
- Global Licenses 501
- Table 97 502
- Figure 130 503
- Table 98 504
- Figure 131 505
- BEGIN LICENSE and 506
- END LICENSE lines 506
- Install New License 507
- Interfaces 508
- Adding a host interface 509
- Table 100 512
- 0 (zero) 513
- Interface fields (continued) 513
- Removing a host interface 514
- Figure 136 515
- Managing static routes 517
- Adding a static route 518
- Removing a static route 519
- Figure 140 520
- Figure 141 521
- Port fields 522
- Table 102 522
- Adding interface ports 524
- Removing interface ports 524
- Adding an access list entry 526
- Removing an Access List entry 527
- Date & Time 528
- Date & Time fields 529
- Adding an NTP server 530
- Removing an NTP server 531
- Figure 147 532
- Table 107 533
- Managing syslog servers 534
- Adding a new syslog server 535
- Adding a DNS server 538
- Managing RSA servers 540
- Adding an RSA server 541
- Removing the RSA node secret 542
- RSA Server 543
- RSA Server fields 543
- Importing sdconf.rec 544
- Figure 155 545
- Import sdconf.rec fields 546
- SRS Control Settings 547
- Add SSH Key fields 548
- Showing SSH keys 549
- SSH Keys – Hosts 551
- SSH Keys Hosts field 552
- Add SSH Key 553
- NSNAS-SSL-Audit-Trail) 555
- Figure 160 557
- Table 116 558
- Audit Servers 559
- Adding a new Audit Server 560
- Configuration tab 563
- Figure 163 563
- Table 118 564
- Radius Server Table 565
- Add Radius Server 566
- Add Radius Server fields 566
- Chapter 11 569
- Managing certificates 569
- Key and certificate formats 571
- Creating certificates 573
- Updating certificates 574
- Figure 166 582
- Figure 170 593
- Parameter Description 594
- Certificates screen 598
- Add a Certificate Component 599
- Figure 174 601
- Table 125 602
- Import Certificate screen 604
- Figure 176 606
- Display Certificates fields 607
- Figure 177 608
- Table 128 609
- Viewing configuration details 610
- Figure 178 611
- Table 129 611
- Viewing general information 612
- Figure 179 613
- Table 130 613
- Table 130 Info fields 614
- Figure 180 615
- Table 131 615
- Table 131 Subject fields 616
- Chapter 12 617
- Configuring SNMP 617
- /cfg/sys/adm/snmp 618
- Roadmap of SNMP commands 619
- The SNMPv2-MIB menu displays 621
- Figure 181 632
- Table 132 633
- Adding SNMP targets 635
- Figure 183 636
- SNMP Target fields 637
- Managing SNMP targets 638
- Removing SNMP targets 639
- Adding SNMPv3 users 641
- Figure 186 642
- Table 135 643
- Managing SNMPv3 users 644
- Table 136 645
- Removing SNMPv3 users 646
- Managing monitor events 647
- Adding monitor events 648
- Add a Monitor fields 649
- Removing monitor events 650
- Boolean monitors 650
- Table 138 651
- Threshold monitors 652
- Table 139 653
- Existence monitors 654
- Managing notification events 655
- Adding notification events 656
- Add a Notification Event 657
- Removing notification events 658
- Chapter 13 659
- The Events menu displays 666
- Figure 194 669
- Figure 195 671
- Table 142 671
- Figure 196 673
- Table 143 674
- Figure 197 675
- Table 144 676
- Figure 198 677
- Switch Distribution fields 678
- Figure 199 679
- Table 146 679
- Licenses tab 681
- Figure 200 681
- Table 147 682
- Domain Licenses tab 683
- Figure 201 683
- Per Domain Licenses fields 684
- Sessions screen 685
- Table 149 686
- Figure 203 687
- Ending active user sessions 688
- 3 Click KickOut 689
- Table 151 689
- Number of Sessions screen 690
- Number of Sessions fields 690
- Viewing alarms using the SREM 691
- Figure 206 692
- Table 153 693
- Download Alarms tab 694
- Figure 207 694
- Table 154 695
- Figure 208 696
- Figure 209 697
- Table 155 697
- The Hosts table 699
- Viewing License statistics 701
- Viewing RADIUS statistics 702
- Table 157 703
- Figure 213 704
- Table 158 704
- Viewing LDAP statistics 705
- Table 159 706
- The Statistics table 707
- Figure 218 713
- Table 162 713
- The Ethernet Interface table 717
- Viewing Rx statistics 718
- Viewing Tx statistics 720
- Chapter 14 723
- Table 166 731
- The Boot menu displays 733
- Dump fields 738
- 3 Click Dump 738
- Table 167 738
- Figure 224 739
- Start/Stop Trace fields 740
- Table 168 740
- Check Configuration 741
- Backup & Restore 742
- Backup & Restore fields 743
- Image List 744
- Activating a software image 747
- Figure 230 749
- Download Image fields 750
- Reboot/Delete ISD Options 751
- Figure 232 753
- Table 172 753
- Figure 233 754
- Table 173 755
- Chapter 15 757
- /boot/software/cur command 760
- Reinstalling the software 763
- Chapter 16 769
- The Command Line Interface 769
- Requirements 771
- Procedure 771
- Running Telnet 773
- Running an SSH client 774
- User access levels 776
- CLI Main Menu or Setup 777
- Idle timeout 777
- Chapter 17 779
- Configuration example 779
- Table 176 780
- Creating a new DHCP scope 783
- Naming the new DHCP scope 784
- Figure 239 785
- Figure 240 786
- Figure 241 787
- Specifying the DNS server 788
- Enabling SSH 791
- Creating port-based VLANs 791
- Configuring the VoIP VLANs 791
- Configuring the NSNA ports 792
- Enabling NSNA globally 792
- Setting the switch IP address 793
- Configuring SSH 794
- Performing initial setup 796
- Completing initial setup 797
- Add the switch manually: 799
- Switch 8300: 799
- Mapping the VLANs 800
- Appendix A 803
- CLI reference 803
- Using the CLI 804
- CLI shortcuts 807
- Command abbreviation 808
- Tab completion 808
- IP addresses 810
- Network masks 810
- Variables 811
- CLI Main Menu 812
- CLI command reference 812
- Appendix A CLI reference 813 813
- Information menu 814
- Statistics menu 815
- Configuration menu 816
- Boot menu 835
- Maintenance menu 836
- Chapter 18 837
- Troubleshooting 837
- Enable Telnet or SSH access 838
- Check the Access List 838
- Cannot contact the MIP 841
- Console connection 843
- A user password is lost 844
- Trace tools 845
- System diagnostics 847
- Error log files 849
- Appendix B 851
- Syslog messages 851
- About alarm messages 854
- parameter is listed first 855
- Table 193 855
- About event messages 856
- Start-up messages 860
- AAA subsystem messages 861
- is enabled 862
- Table 201 862
- NSNAS subsystem messages 863
- Table 202 864
- NSNAS — INFO (Sheet 2 of 2) 865
- /cfg/sys/cur 869
- Appendix C 875
- Supported MIBs 875
- 876 Appendix C Supported MIBs 876
- Supported MIBs (Sheet 1 of 3) 876
- Appendix C Supported MIBs 877 877
- Supported MIBs (Sheet 2 of 3) 877
- 878 Appendix C Supported MIBs 878
- Supported MIBs (Sheet 3 of 3) 878
- Supported traps 879
- 880 Appendix C Supported MIBs 880
- Appendix D 881
- Supported ciphers 881
- Table 207 Supported ciphers 882
- Appendix E 883
- Directory 883
- (Windows 2000 Server) 886
- Create a new attribute 887
- Create the new class 888
- Appendix F 891
- Creating the DHCP options 892
- The DHCP Management Console 893
- Figure 246 894
- 4 Click Add 894
- The Option Type dialog box 895
- Information options 896
- Figure 248 897
- Setting up the IP Phone 899
- Appendix G 901
- Creating a logon script 902
- Assigning the logon script 903
- Assigning a logon script 904
- Appendix H 905
- GNU General Public License 906
- Bouncy Castle license 910
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