Port 1742
3Com-nsd · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | 3Com-nsd |
Frequently asked questions
What is port 1742 used for?
Port 1742 is registered with the IANA for 3Com-nsd (TCP/UDP). Description: 3Com-nsd.
Is port 1742 a well-known port?
No. Port 1742 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 1742 is open?
Locally on Linux with ss -tulpn | grep ':1742\b', on Windows with netstat -ano | findstr :1742. To test a remote host use Test-NetConnection <host> -Port 1742 in PowerShell or nc -zv <host> 1742 on Linux/macOS.
How do I open port 1742 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 1742/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1742/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1742" -Direction Inbound -Protocol TCP -LocalPort 1742 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | 3Com-nsd | 3Com-nsd |
| UDP | 3Com-nsd | 3Com-nsd |