Port 8900
jmb-cds1 · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | jmb-cds1 |
Frequently asked questions
What is port 8900 used for?
Port 8900 is registered with the IANA for jmb-cds1 (TCP/UDP). Description: JMB-CDS 1.
Is port 8900 a well-known port?
No. Port 8900 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 8900 is open?
Locally on Linux with ss -tulpn | grep ':8900\b', on Windows with netstat -ano | findstr :8900. To test a remote host use Test-NetConnection <host> -Port 8900 in PowerShell or nc -zv <host> 8900 on Linux/macOS.
How do I open port 8900 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 8900/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=8900/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 8900" -Direction Inbound -Protocol TCP -LocalPort 8900 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | jmb-cds1 | JMB-CDS 1 |
| UDP | jmb-cds1 | JMB-CDS 1 |