Port 3757
grf-port · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | grf-port |
| Registered | 2003-04 |
Frequently asked questions
What is port 3757 used for?
Port 3757 is registered with the IANA for grf-port (TCP/UDP). Description: GRF Server Port.
Is port 3757 a well-known port?
No. Port 3757 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 3757 is open?
Locally on Linux with ss -tulpn | grep ':3757\b', on Windows with netstat -ano | findstr :3757. To test a remote host use Test-NetConnection <host> -Port 3757 in PowerShell or nc -zv <host> 3757 on Linux/macOS.
How do I open port 3757 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 3757/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3757/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3757" -Direction Inbound -Protocol TCP -LocalPort 3757 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | grf-port | GRF Server Port |
| UDP | grf-port | GRF Server Port |