In-Band or Out-of-Band Management?

About this interactive

From the lesson: - **In-band management** travels over the production network, usually a management VLAN. Lock it down: access control lists so only admin machines reach it, and SSH, never Telnet, because Telnet sends credentials in clear text. - **Out-of-band management** uses separate hardware: its own switch and cabling, or a console server wired to each device's console port. It still works when the production network or internet link is down. - **The rest of the basics:** lock up network closets, use strong passwords, shut down unused ports, patch firmware and turn off unused services before a device goes live.

What you'll learn

Tell in-band management, which shares the production network, from out-of-band management, which uses separate hardware such as a console server
Explain why out-of-band access matters in an outage, and why in-band management needs a management VLAN, access control lists and SSH instead of Telnet

Aligned to

Cisco CCNA

2.8 Describe network device management access

4.8 Configure network devices for remote access using SSH

Key terms

Out-of-Band Management: A method of managing network devices using a physically separate network or connection, independent of the primary data network.
Management VLAN: A VLAN reserved for administrative access to network devices, separating switch and router management traffic from user data traffic so that a compromised end device does not share a broadcast domain with the management addresses.
Secure Shell: A cryptographic network protocol that provides secure remote login and command execution over an unsecured network.
Telnet: Telnet is a legacy remote terminal protocol that transmits all data including credentials in cleartext; it is considered insecure and serves as a security training example of why encrypted alternatives like SSH are required.
Console Port: A physical management port on a network device used to establish a direct local connection for configuration and administration.
Device Hardening: The process of securing a device by updating firmware, disabling unused services and ports, and applying security configurations to reduce its attack surface.

Topics

Device Security Out Of Band Management In Band Management Ssh Interactive Streak Sort

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