All ports
Port9131/TCP
dddpPort
9131
Protocol
TCP
Category
Registered
Service
dddp
What is port 9131?
Port 9131/TCP is a Registered port, registered with IANA for specific applications. It is associated with the dddp service.
Dynamic Device Discovery
Useful commands
nmapnmap -p 9131 -sV example.comnetcatnc -zv example.com 9131curlcurl -v http://example.com:9131/telnettelnet example.com 9131bash(echo > /dev/tcp/example.com/9131) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 9131/tcpDeny
sudo ufw deny 9131/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 9131 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 9131 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=9131/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 9131" dir=in action=allow protocol=TCP localport=9131Security 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- Outdated versions with vulnerabilities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 9131/TCP?
Port 9131/TCP is associated with the dddp service. Dynamic Device Discovery
Is it safe to expose port 9131 to the Internet?
It depends on the service and configuration. Port 9131 (dddp) 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 9131 is open?
You can use nmap: `nmap -p 9131 -sV example.com`, netcat: `nc -zv example.com 9131`, or the bash command: `(echo > /dev/tcp/example.com/9131) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 9131 on my firewall?
On Linux with UFW: `sudo ufw allow 9131/tcp` (open) or `sudo ufw deny 9131/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 9131 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 9131" dir=in action=allow protocol=TCP localport=9131`.
What applications and services use port 9131?
Port 9131/TCP is used by the dddp service. Specific uses depend on the software and configuration. Check our related tools section for more information.