Port 564
9pfs · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | 9pfs |
Frequently asked questions
What is port 564 used for?
Port 564 is registered with the IANA for 9pfs (TCP/UDP). Description: plan 9 file service.
Is port 564 a well-known port?
Yes. Port 564 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 564 is open?
Locally on Linux with ss -tulpn | grep ':564\b', on Windows with netstat -ano | findstr :564. To test a remote host use Test-NetConnection <host> -Port 564 in PowerShell or nc -zv <host> 564 on Linux/macOS.
How do I open port 564 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 564/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=564/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 564" -Direction Inbound -Protocol TCP -LocalPort 564 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | 9pfs | plan 9 file service |
| UDP | 9pfs | plan 9 file service |