Knowledge Base

Secure SSH Access on Linux Servers

SSH provides encrypted remote administration, but default access should be hardened before a server enters production.

Use SSH keys

Create a separate administrative user and test key-based login in a second session before disabling password authentication.

Restrict exposure

Allow SSH through the firewall only where required. A custom port reduces background noise but does not replace keys and access controls.

Disable direct root login

Use a sudo-enabled user and keep an emergency recovery path. Review authentication logs and use rate limiting or tools such as Fail2Ban where appropriate.