Puerto22— SSH / SFTP
OpenSSH escucha en TCP 22 de forma predeterminada. Su subsistema SFTP transfiere archivos mediante SSH, no mediante el protocolo histórico asignado al puerto 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
Revise Port y ListenAddress en sshd_config. Mantenga la sesión actual y el acceso a la consola mientras valida el cambio, y pruebe una segunda conexión antes de desconectarse.
Important limitations
Cambiar el puerto no sustituye la autenticación ni el control de acceso. No desactive la verificación de la clave del servidor para eludir fallos de conexión.
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:LISTENWindows PowerShell
Get-NetTCPConnection -LocalPort 22 -State ListenSources and review
Sources checked on:
This review covers the explanations and sources on this page, not your device or every community software entry below.
Related troubleshooting guides
Software que utiliza este puerto (3 programas)
Community software entries: links are references, not individual verification.
Recomendaciones de uso
- Antes de utilizar el puerto 22, comprueba que no esté ocupado por otros servicios
- Si encuentras conflictos de puertos, considera utilizar otros puertos o detener el servicio que lo ocupa
Preguntas frecuentes
What is port 22 used for?
Port 22 sits in the File Sharing category. This page lists the registered purpose and the software commonly associated with it; to see what is actually listening on a specific machine, check the process with ss/netstat.
Is port 22 TCP or UDP?
The registered protocol on this page is TCP. The same number behaves independently on each protocol: TCP may be listening while UDP is idle, so check them separately.
How do I check if port 22 is in use?
On Linux: sudo ss -tlnp 'sport = :22' for an exact port match. On macOS: sudo lsof -nP -iTCP:22 -sTCP:LISTEN. On Windows PowerShell: Get-NetTCPConnection -LocalPort 22 -State Listen. A listener counts as confirmed only when you can see the bind address and process name; without root/admin you will not see other users' processes.
Is port 22 secure? Should I open it in my firewall?
A port number has no inherent security — it depends on whether the listening service is correctly configured and whether it needs exposure at all. Keep loopback/internal-only services firewalled; where public access is required, pair it with source restrictions, VPN or authentication. The caution section on this page lists port-specific risks.
Información rápida
- Puerto
- 22
- Protocolo
- TCP
- Categorías
- Intercambio de archivos
- Estado de uso
- 3 programas que lo utilizan
Puertos relacionados
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