Port 2103
zephyr-clt · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | zephyr-clt |
Frequently asked questions
What is port 2103 used for?
Port 2103 is registered with the IANA for zephyr-clt (TCP/UDP). Description: Zephyr serv-hm connection.
Is port 2103 a well-known port?
No. Port 2103 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 2103 is open?
Locally on Linux with ss -tulpn | grep ':2103\b', on Windows with netstat -ano | findstr :2103. To test a remote host use Test-NetConnection <host> -Port 2103 in PowerShell or nc -zv <host> 2103 on Linux/macOS.
How do I open port 2103 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 2103/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=2103/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 2103" -Direction Inbound -Protocol TCP -LocalPort 2103 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | zephyr-clt | Zephyr serv-hm connection |
| UDP | zephyr-clt | Zephyr serv-hm connection |