All ports
Port6791/UDP
hnmPort
6791
Protocol
UDP
Category
Registered
Service
hnm
What is port 6791?
Port 6791/UDP is a Registered port, registered with IANA for specific applications. It is associated with the hnm service.
Halcyon Network Manager
Useful commands
nmapnmap -p 6791 -sV example.comnetcatnc -zv example.com 6791curlcurl -v http://example.com:6791/telnettelnet example.com 6791bash(echo > /dev/udp/example.com/6791) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 6791/udpDeny
sudo ufw deny 6791/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 6791 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 6791 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=6791/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 6791" dir=in action=allow protocol=UDP localport=6791Security 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- Outdated versions with vulnerabilities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 6791/UDP?
Port 6791/UDP is associated with the hnm service. Halcyon Network Manager
Is it safe to expose port 6791 to the Internet?
It depends on the service and configuration. Port 6791 (hnm) 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 6791 is open?
You can use nmap: `nmap -p 6791 -sV example.com`, netcat: `nc -zv example.com 6791`, or the bash command: `(echo > /dev/udp/example.com/6791) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 6791 on my firewall?
On Linux with UFW: `sudo ufw allow 6791/udp` (open) or `sudo ufw deny 6791/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 6791 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 6791" dir=in action=allow protocol=UDP localport=6791`.
What applications and services use port 6791?
Port 6791/UDP is used by the hnm service. Specific uses depend on the software and configuration. Check our related tools section for more information.