All ports
Port4089/UDP
opencorePort
4089
Protocol
UDP
Category
Registered
Service
opencore
What is port 4089?
Port 4089/UDP is a Registered port, registered with IANA for specific applications. It is associated with the opencore service.
OpenCORE Remote Control Service
Useful commands
nmapnmap -p 4089 -sV example.comnetcatnc -zv example.com 4089curlcurl -v http://example.com:4089/telnettelnet example.com 4089bash(echo > /dev/udp/example.com/4089) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4089/udpDeny
sudo ufw deny 4089/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4089 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4089 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4089/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4089" dir=in action=allow protocol=UDP localport=4089Security 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- Outdated versions with vulnerabilities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 4089/UDP?
Port 4089/UDP is associated with the opencore service. OpenCORE Remote Control Service
Is it safe to expose port 4089 to the Internet?
It depends on the service and configuration. Port 4089 (opencore) 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 4089 is open?
You can use nmap: `nmap -p 4089 -sV example.com`, netcat: `nc -zv example.com 4089`, or the bash command: `(echo > /dev/udp/example.com/4089) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4089 on my firewall?
On Linux with UFW: `sudo ufw allow 4089/udp` (open) or `sudo ufw deny 4089/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4089 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4089" dir=in action=allow protocol=UDP localport=4089`.
What applications and services use port 4089?
Port 4089/UDP is used by the opencore service. Specific uses depend on the software and configuration. Check our related tools section for more information.