Port 27
nsw-fe · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | nsw-fe |
Frequently asked questions
What is port 27 used for?
Port 27 is registered with the IANA for nsw-fe (TCP/UDP). Description: NSW User System FE.
Is port 27 a well-known port?
Yes. Port 27 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 27 is open?
Locally on Linux with ss -tulpn | grep ':27\b', on Windows with netstat -ano | findstr :27. To test a remote host use Test-NetConnection <host> -Port 27 in PowerShell or nc -zv <host> 27 on Linux/macOS.
How do I open port 27 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 27/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=27/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 27" -Direction Inbound -Protocol TCP -LocalPort 27 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | nsw-fe | NSW User System FE |
| UDP | nsw-fe | NSW User System FE |