All ports
Port4785/UDP
cncpPort
4785
Protocol
UDP
Category
Registered
Service
cncp
What is port 4785?
Port 4785/UDP is a Registered port, registered with IANA for specific applications. It is associated with the cncp service.
Cisco Nexus Control Protocol
Useful commands
nmapnmap -p 4785 -sV example.comnetcatnc -zv example.com 4785curlcurl -v http://example.com:4785/telnettelnet example.com 4785bash(echo > /dev/udp/example.com/4785) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4785/udpDeny
sudo ufw deny 4785/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4785 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4785 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4785/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4785" dir=in action=allow protocol=UDP localport=4785Security 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- Outdated versions with vulnerabilities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 4785/UDP?
Port 4785/UDP is associated with the cncp service. Cisco Nexus Control Protocol
Is it safe to expose port 4785 to the Internet?
It depends on the service and configuration. Port 4785 (cncp) 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 4785 is open?
You can use nmap: `nmap -p 4785 -sV example.com`, netcat: `nc -zv example.com 4785`, or the bash command: `(echo > /dev/udp/example.com/4785) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4785 on my firewall?
On Linux with UFW: `sudo ufw allow 4785/udp` (open) or `sudo ufw deny 4785/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4785 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4785" dir=in action=allow protocol=UDP localport=4785`.
What applications and services use port 4785?
Port 4785/UDP is used by the cncp service. Specific uses depend on the software and configuration. Check our related tools section for more information.