Setup Guide

Table Of Contents
TACACS+ Remote Authentication........................................................................................................................ 779
Command Authorization..........................................................................................................................................780
Protection from TCP Tiny and Overlapping Fragment Attacks...........................................................................780
Enabling SCP and SSH.................................................................................................................................................. 780
Using SCP with SSH to Copy a Software Image............................................................................................... 781
Removing the RSA Host Keys and Zeroizing Storage .................................................................................... 782
Configuring When to Re-generate an SSH Key ................................................................................................782
Configuring the SSH Server Key Exchange Algorithm.....................................................................................782
Configuring the HMAC Algorithm for the SSH Server.................................................................................... 783
Configuring the HMAC Algorithm for the SSH Client...................................................................................... 783
Configuring the SSH Server Cipher List..............................................................................................................784
Configuring the SSH Client Cipher List............................................................................................................... 784
Configuring DNS in the SSH Server..................................................................................................................... 785
Secure Shell Authentication................................................................................................................................... 785
Troubleshooting SSH................................................................................................................................................788
Telnet................................................................................................................................................................................. 788
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.......................................................................................................................................... 790
Overview of RBAC....................................................................................................................................................790
User Roles................................................................................................................................................................... 792
AAA Authentication and Authorization for Roles.............................................................................................. 795
Role Accounting.........................................................................................................................................................798
Display Information About User Roles..................................................................................................................799
Two Factor Authentication (2FA).............................................................................................................................. 800
Handling Access-Challenge Message.................................................................................................................. 800
Configuring Challenge Response Authentication for SSHv2......................................................................... 800
SMS-OTP Mechanism.............................................................................................................................................. 801
Configuring the System to Drop Certain ICMP Reply Messages........................................................................ 801
SSH Lockout Settings................................................................................................................................................... 803
Dell EMC Networking OS Security Hardening.........................................................................................................803
Dell EMC Networking OS Image Verification..................................................................................................... 803
Startup Configuration Verification........................................................................................................................804
Configuring the root User Password................................................................................................................... 805
Locking Access to GRUB Interface......................................................................................................................805
Enabling User Lockout for Failed Login Attempts............................................................................................ 806
Chapter 48: Service Provider Bridging.......................................................................................807
VLAN Stacking.................................................................................................................................................................807
Configure VLAN Stacking....................................................................................................................................... 808
Creating Access and Trunk Ports......................................................................................................................... 809
Enable VLAN-Stacking for a VLAN...................................................................................................................... 809
Configuring the Protocol Type Value for the Outer VLAN Tag......................................................................810
Configuring Dell EMC Networking OS Options for Trunk Ports.................................................................... 810
Debugging VLAN Stacking....................................................................................................................................... 811
VLAN Stacking in Multi-Vendor Networks...........................................................................................................811
VLAN Stacking Packet Drop Precedence..................................................................................................................814
Enabling Drop Eligibility............................................................................................................................................ 814
Contents
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