All ports
Port6551/TCP
sumPort
6551
Protocol
TCP
Category
Registered
Service
sum
What is port 6551?
Port 6551/TCP is a Registered port, registered with IANA for specific applications. It is associated with the sum service.
Software Update Manager
Useful commands
nmapnmap -p 6551 -sV example.comnetcatnc -zv example.com 6551curlcurl -v http://example.com:6551/telnettelnet example.com 6551bash(echo > /dev/tcp/example.com/6551) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 6551/tcpDeny
sudo ufw deny 6551/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 6551 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 6551 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=6551/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 6551" dir=in action=allow protocol=TCP localport=6551Security 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- Outdated versions with vulnerabilities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 6551/TCP?
Port 6551/TCP is associated with the sum service. Software Update Manager
Is it safe to expose port 6551 to the Internet?
It depends on the service and configuration. Port 6551 (sum) 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 6551 is open?
You can use nmap: `nmap -p 6551 -sV example.com`, netcat: `nc -zv example.com 6551`, or the bash command: `(echo > /dev/tcp/example.com/6551) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 6551 on my firewall?
On Linux with UFW: `sudo ufw allow 6551/tcp` (open) or `sudo ufw deny 6551/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 6551 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 6551" dir=in action=allow protocol=TCP localport=6551`.
What applications and services use port 6551?
Port 6551/TCP is used by the sum service. Specific uses depend on the software and configuration. Check our related tools section for more information.