Port 20000
dnp · SCTP/TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | SCTP/TCP/UDP |
| Service | dnp |
| Registered | 2022-12-20 |
Frequently asked questions
What is port 20000 used for?
Port 20000 is registered with the IANA for dnp (SCTP/TCP/UDP). Description: DNP; Distributed Network Protocol.
Is port 20000 a well-known port?
No. Port 20000 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 20000 is open?
Locally on Linux with ss -tulpn | grep ':20000\b', on Windows with netstat -ano | findstr :20000. To test a remote host use Test-NetConnection <host> -Port 20000 in PowerShell or nc -zv <host> 20000 on Linux/macOS.
How do I open port 20000 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 20000/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=20000/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 20000" -Direction Inbound -Protocol TCP -LocalPort 20000 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | dnp | DNP |
| UDP | dnp | DNP |
| SCTP | dnp | Distributed Network Protocol |