Port 21337
xahaud · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | xahaud |
| Reference | https://xahau.network |
| Registered | 2025-10-16 |
Frequently asked questions
What is port 21337 used for?
Port 21337 is registered with the IANA for xahaud (TCP/UDP). Description: Xahau P2P network protocol; Reserved.
Is port 21337 a well-known port?
No. Port 21337 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 21337 is open?
Locally on Linux with ss -tulpn | grep ':21337\b', on Windows with netstat -ano | findstr :21337. To test a remote host use Test-NetConnection <host> -Port 21337 in PowerShell or nc -zv <host> 21337 on Linux/macOS.
How do I open port 21337 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 21337/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=21337/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 21337" -Direction Inbound -Protocol TCP -LocalPort 21337 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | xahaud | Xahau P2P network protocol |
| UDP | – | Reserved |