CCNA 200-301 Portable Command Guide, 5th Edition

Chapter 22. Device Monitoring and Hardening

This chapter provides information about the following topics:

• Device monitoring

• Configuration backups

• Implementing logging

  • Configuring syslog

  • Syslog message format

  • Syslog severity levels

  • Syslog message example

• Device hardening

  • Configuring passwords

  • Password encryption

  • Password encryption algorithm types

  • Configuring SSH

  • Verifying SSH

  • Restricting virtual terminal access

  • Disabling unused services

Device Monitoring

Network administrators need to be able to perform more than just the configuration of network devices. They need to be able to monitor network devices to ensure that the network is operating as efficiently as possible and to identify potential bottlenecks or trouble spots. The following ...