Port 3493
nut · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | nut |
| Reference | RFC 9271 |
| Registered | 2002-05 |
| Modified | 2022-05-18 |
Frequently asked questions
What is port 3493 used for?
Port 3493 is registered with the IANA for nut (TCP/UDP). Description: Network UPS Tools.
Is port 3493 a well-known port?
No. Port 3493 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 3493 is open?
Locally on Linux with ss -tulpn | grep ':3493\b', on Windows with netstat -ano | findstr :3493. To test a remote host use Test-NetConnection <host> -Port 3493 in PowerShell or nc -zv <host> 3493 on Linux/macOS.
How do I open port 3493 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 3493/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3493/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3493" -Direction Inbound -Protocol TCP -LocalPort 3493 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | nut | Network UPS Tools |
| UDP | nut | Network UPS Tools |