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Port 22: SSH (Secure Shell) & SFTP

SSH (Secure Shell) provides encrypted remote command-line login and system administration on Linux/Unix systems.

Protocol
TCP
Category
Remote Administration
Common Services
OpenSSH, Dropbear, PuTTY

What is Port 22 and How Does It Work?

SSH (Secure Shell) provides encrypted remote command-line login and system administration on Linux/Unix systems.

Security Vulnerabilities & Attack Vectors on Port 22

Port 22 is heavily targeted by automated brute-force attacks. Disable root login, enforce SSH keys, and use Fail2ban.

Auditing & Scanning Port 22 with Nmap

Run the following command to check if Port 22 is reachable and determine service fingerprints:

nmap -p 22 -sV -sC

Frequently Asked Questions

How do I check if Port 22 is open?
Use cyber-tool.org diagnostic tools or run 'nc -zv 22' in your terminal to verify open socket connections.
Is it safe to leave Port 22 open to the internet?
Exposing Port 22 (SSH (Secure Shell) & SFTP) publicly introduces potential exposure. Protect it with IP whitelisting, firewalls, and encryption.