All ports
Port6900/TCP
rtimeviewerPort
6900
Protocol
TCP
Category
Registered
Service
rtimeviewer
What is port 6900?
Port 6900/TCP is a Registered port, registered with IANA for specific applications. It is associated with the rtimeviewer service.
R*TIME Viewer Data Interface
Useful commands
nmapnmap -p 6900 -sV example.comnetcatnc -zv example.com 6900curlcurl -v http://example.com:6900/telnettelnet example.com 6900bash(echo > /dev/tcp/example.com/6900) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 6900/tcpDeny
sudo ufw deny 6900/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 6900 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 6900 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=6900/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 6900" dir=in action=allow protocol=TCP localport=6900Security Risks
- Unauthorized access to the service
- Data exposure if the service is unauthenticated
- Outdated versions with vulnerabilities
- Incorrect service configuration
Frequently Asked Questions
What service runs on port 6900/TCP?
Port 6900/TCP is associated with the rtimeviewer service. R*TIME Viewer Data Interface
Is it safe to expose port 6900 to the Internet?
It depends on the service and configuration. Port 6900 (rtimeviewer) is a Registered port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 6900 is open?
You can use nmap: `nmap -p 6900 -sV example.com`, netcat: `nc -zv example.com 6900`, or the bash command: `(echo > /dev/tcp/example.com/6900) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 6900 on my firewall?
On Linux with UFW: `sudo ufw allow 6900/tcp` (open) or `sudo ufw deny 6900/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 6900 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 6900" dir=in action=allow protocol=TCP localport=6900`.
What applications and services use port 6900?
Port 6900/TCP is used by the rtimeviewer service. Specific uses depend on the software and configuration. Check our related tools section for more information.