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Table Of Contents
Support for Change of Authorization and Disconnect Messages packets................................................. 768
TACACS+.......................................................................................................................................................................... 778
Configuration Task List for TACACS+................................................................................................................. 778
TACACS+ Remote Authentication........................................................................................................................ 779
Command Authorization..........................................................................................................................................780
Protection from TCP Tiny and Overlapping Fragment Attacks........................................................................... 781
Enabling SCP and SSH................................................................................................................................................... 781
Using SCP with SSH to Copy a Software Image...............................................................................................782
Removing the RSA Host Keys and Zeroizing Storage .................................................................................... 782
Configuring When to Re-generate an SSH Key ................................................................................................783
Configuring the SSH Server Key Exchange Algorithm.....................................................................................783
Configuring the HMAC Algorithm for the SSH Server.................................................................................... 784
Configuring the SSH Server Cipher List..............................................................................................................784
Configuring DNS in the SSH Server..................................................................................................................... 785
Secure Shell Authentication................................................................................................................................... 785
Troubleshooting SSH................................................................................................................................................787
Telnet................................................................................................................................................................................. 787
VTY Line and Access-Class Configuration................................................................................................................788
VTY Line Local Authentication and Authorization.............................................................................................788
VTY Line Remote Authentication and Authorization........................................................................................789
VTY MAC-SA Filter Support...................................................................................................................................789
Role-Based Access Control.......................................................................................................................................... 789
Overview of RBAC....................................................................................................................................................790
User Roles................................................................................................................................................................... 792
AAA Authentication and Authorization for Roles.............................................................................................. 795
Role Accounting.........................................................................................................................................................797
Display Information About User Roles..................................................................................................................798
Two Factor Authentication (2FA)...............................................................................................................................799
Handling Access-Challenge Message.................................................................................................................. 800
Configuring Challenge Response Authentication for SSHv2......................................................................... 800
SMS-OTP Mechanism............................................................................................................................................. 800
Configuring the System to Drop Certain ICMP Reply Messages........................................................................ 801
SSH Lockout Settings................................................................................................................................................... 802
Dell EMC Networking OS Security Hardening.........................................................................................................802
Dell EMC Networking OS Image Verification..................................................................................................... 802
Startup Configuration Verification........................................................................................................................803
Configuring the root User Password....................................................................................................................804
Locking Access to GRUB Interface......................................................................................................................805
Enabling User Lockout for Failed Login Attempts............................................................................................ 805
Chapter 48: Service Provider Bridging...................................................................................... 806
VLAN Stacking................................................................................................................................................................ 806
Configure VLAN Stacking....................................................................................................................................... 807
Creating Access and Trunk Ports......................................................................................................................... 808
Enable VLAN-Stacking for a VLAN.......................................................................................................................808
Configuring the Protocol Type Value for the Outer VLAN Tag.....................................................................809
Configuring Dell EMC Networking OS Options for Trunk Ports................................................................... 809
Debugging VLAN Stacking...................................................................................................................................... 810
VLAN Stacking in Multi-Vendor Networks.......................................................................................................... 810
VLAN Stacking Packet Drop Precedence..................................................................................................................813
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