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CHAPTER 2

Getting Started 13

Configuring System Administrative Users 13

Limiting the Number of Concurrent CLI Sessions 13

Automatic Logout of CLI Sessions 14

Configuring SSH Options 14

SSH Host Keys 15

Setting SSH Key Size 15

Configuring SSH Key Generation Wait Time 15

Specifying SSH Encryption Ciphers 16

Generating SSH Keys 17

Setting SSH Key Pair 17

Authorized SSH User Access 18

Authorizing SSH User Access 18

SSH User Login Restrictions 18

Creating an Allowed Users List 19

SSH User Login Authentication 19

Secure Session Logout 20

Changing Default sshd Secure Session Logout Parameters 21

SSH Client Login to External Servers 21

Setting SSH Client Ciphers 21

Setting Preferred Authentication Methods 22

Generating SSH Client Key Pair 23

Pushing an SSH Client Public Key to an External Server 24

Enabling NETCONF 24

CHAPTER 3

System Settings 25

Configuring System Timing 25

Setting the System Clock and Time Zone 26

Verifying and Saving Your Clock and Time Zone Configuration 26

Configuring Network Time Protocol Support 26

Configuring NTP Servers with Local Sources 27

Using a Load Balancer 27

Verifying the NTP Configuration 28

Configuring SF Boot Configuration Pause 29

ASR 5500 System Administration Guide, StarOS Release 21.5

Contents

Cisco ASR 5500 System Administration Guide

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