Port 4444
krb524 and nv-video · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | krb524 and nv-video |
Frequently asked questions
What is port 4444 used for?
Port 4444 is registered with the IANA for krb524 and nv-video (TCP/UDP). Description: KRB524; NV Video default.
Is port 4444 a well-known port?
No. Port 4444 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4444 is open?
Locally on Linux with ss -tulpn | grep ':4444\b', on Windows with netstat -ano | findstr :4444. To test a remote host use Test-NetConnection <host> -Port 4444 in PowerShell or nc -zv <host> 4444 on Linux/macOS.
How do I open port 4444 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4444/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4444/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4444" -Direction Inbound -Protocol TCP -LocalPort 4444 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | krb524 | KRB524 |
| UDP | krb524 | KRB524 |
| TCP | nv-video | NV Video default |
| UDP | nv-video | NV Video default |