Port 22 — SSH / SFTP

TCPFile Sharing

OpenSSH listens on TCP 22 by default. Its SFTP subsystem transfers files over SSH, not the historical protocol assigned port 115.

Registry assignments, software defaults and local listeners are different things. A port number alone does not identify or secure a service.

Configuration and troubleshooting

Inspect Port and ListenAddress in sshd_config. Keep your current session and console access while validating a change, then test a second connection before disconnecting.

Important limitations

Changing the port is not a substitute for authentication or access control. Do not disable host-key verification to work around connection failures.

Read-only checks: run on the server host

Choose the commands for your OS. Check TCP and UDP separately. No result is not a lasting availability guarantee; inspect host and container separately.

Linux

sudo ss -ltnp 'sport = :22'

macOS

sudo lsof -nP -iTCP:22 -sTCP:LISTEN

Windows PowerShell

Get-NetTCPConnection -LocalPort 22 -State Listen

Sources and review

Sources checked on:

This review covers the explanations and sources on this page, not your device or every community software entry below.

Software Using This Port (3 software)

Community software entries: links are references, not individual verification.

OpenSSH

Secure remote login and file transfer protocol

Reference link ↗

PuTTY

Popular SSH client on Windows platform

Reference link ↗

SSH Secure Shell

SSH secure shell protocol

Reference link ↗

Usage Suggestions

  • Before using port 22, please confirm it is not occupied by other services
  • If you encounter port conflicts, consider using other ports or stopping the occupying service

Quick Info

Port
22
Protocol
TCP
Categories
File Sharing
Usage Status
3 software in use

Related Ports

Port 21TCP
→
Port 115TCP
→

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