All ports
Port2891/UDP
cinegrfx-elmdPort
2891
Protocol
UDP
Category
Registered
Service
cinegrfx-elmd
What is port 2891?
Port 2891/UDP is a Registered port, registered with IANA for specific applications. It is associated with the cinegrfx-elmd service.
CINEGRFX-ELMD License Manager
Useful commands
nmapnmap -p 2891 -sV example.comnetcatnc -zv example.com 2891curlcurl -v http://example.com:2891/telnettelnet example.com 2891bash(echo > /dev/udp/example.com/2891) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2891/udpDeny
sudo ufw deny 2891/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 2891 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 2891 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2891/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2891" dir=in action=allow protocol=UDP localport=2891Security 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- Outdated versions with vulnerabilities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 2891/UDP?
Port 2891/UDP is associated with the cinegrfx-elmd service. CINEGRFX-ELMD License Manager
Is it safe to expose port 2891 to the Internet?
It depends on the service and configuration. Port 2891 (cinegrfx-elmd) 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 2891 is open?
You can use nmap: `nmap -p 2891 -sV example.com`, netcat: `nc -zv example.com 2891`, or the bash command: `(echo > /dev/udp/example.com/2891) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2891 on my firewall?
On Linux with UFW: `sudo ufw allow 2891/udp` (open) or `sudo ufw deny 2891/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 2891 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2891" dir=in action=allow protocol=UDP localport=2891`.
What applications and services use port 2891?
Port 2891/UDP is used by the cinegrfx-elmd service. Specific uses depend on the software and configuration. Check our related tools section for more information.