Puerto521— RIP Daemon
Puerto de Routing Information Protocol para intercambiar información de enrutamiento de red
Registry assignments, software defaults and local listeners are different things. A port number alone does not identify or secure a service.
Software que utiliza este puerto (2 programas)
Community software entries: links are references, not individual verification.
RIP Daemon
Protocol
Routing Software
Software
Recomendaciones de uso
- Antes de utilizar el puerto 521, 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 521 used for?
Port 521 sits in the System 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 521 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 521 is in use?
On Linux: sudo ss -tlnp 'sport = :521' for an exact port match. On macOS: sudo lsof -nP -iTCP:521 -sTCP:LISTEN. On Windows PowerShell: Get-NetTCPConnection -LocalPort 521 -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 521 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.
Información rápida
- Puerto
- 521
- Protocolo
- TCP
- Categorías
- Sistema
- Estado de uso
- 2 programas que lo utilizan
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