Port 6900
rtimeviewer · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | rtimeviewer |
| Registered | 2016-12-14 |
Frequently asked questions
What is port 6900 used for?
Port 6900 is registered with the IANA for rtimeviewer (TCP/UDP). Description: R*TIME Viewer Data Interface; Reserved.
Is port 6900 a well-known port?
No. Port 6900 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 6900 is open?
Locally on Linux with ss -tulpn | grep ':6900\b', on Windows with netstat -ano | findstr :6900. To test a remote host use Test-NetConnection <host> -Port 6900 in PowerShell or nc -zv <host> 6900 on Linux/macOS.
How do I open port 6900 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 6900/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=6900/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 6900" -Direction Inbound -Protocol TCP -LocalPort 6900 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | rtimeviewer | R*TIME Viewer Data Interface |
| UDP | – | Reserved |