Port 22: SSH
Port 22 is SSH, the encrypted way to open a remote shell, tunnel traffic, and run SFTP or SCP file transfers. It is the default for secure remote administration of Linux and network devices.
TCPRemote access EncryptedIANA assigned
| Port number | 22 |
|---|---|
| Service | Secure Shell / SFTP / SCP |
| Protocol | TCP |
| Category | Remote access |
| Default encryption | Yes (TLS/SSH) |
Frequently asked questions
What is port 22 used for?
Port 22 is SSH, the encrypted way to open a remote shell, tunnel traffic, and run SFTP or SCP file transfers. It is the default for secure remote administration of Linux and network devices.
Is port 22 TCP or UDP?
Port 22 (SSH) uses TCP.
Is port 22 secure?
Yes. Port 22 carries encrypted traffic by default, so data in transit is protected.
Should I open port 22 on my firewall?
Only if you specifically need SSH. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.