SSH
Master Port 22 operations
Require keys or hardware MFA and restrict exposure to trusted networks.
- Default port
- 22
- Protocol
- TCP
- Primary use
- Secure remote administration
Why Port 22 matters
SSH powers automation and remote administration; hardening reduces takeover risk.
Immediate actions
Rotate host keys, disable passwords, and enforce bastion or proxy jump policies.
Operational guardrails
Monitor login attempts, port knocking sequences, and session logs for anomalies.