This document provides an overview of a lesson on securing network devices. The lesson objectives include describing how to configure secure router administration access, SSH, privilege levels, and role-based CLI access. It discusses concepts like router hardening, administrative access configuration, and network monitoring techniques. Specific configuration examples are provided for setting passwords, virtual login security, and SSH. The document also summarizes using SDM to configure the SSH daemon and assigning administrative roles through privilege levels and role-based CLI access.