SSH

SSH provides encrypted remote shell access and secure tunneling.

Updated: 2026-03-05

Definition

Secure Shell (SSH) is a protocol for secure remote login and command execution over an encrypted channel.

It also supports key-based authentication and port forwarding.

Key points

Encrypted remote admin access
Prefer keys over passwords
Common port: 22 (but can be changed)

Common mistakes

Allowing password auth without MFA or brute-force protections.
Exposing SSH publicly without restrictions.

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Related terms

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