All ports
Port4191/UDP
dsmipv6Port
4191
Protocol
UDP
Category
Registered
Service
dsmipv6
What is port 4191?
Port 4191/UDP is a Registered port, registered with IANA for specific applications. It is associated with the dsmipv6 service.
Dual Stack MIPv6 NAT Traversal
Useful commands
nmapnmap -p 4191 -sV example.comnetcatnc -zv example.com 4191curlcurl -v http://example.com:4191/telnettelnet example.com 4191bash(echo > /dev/udp/example.com/4191) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4191/udpDeny
sudo ufw deny 4191/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4191 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4191 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4191/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4191" dir=in action=allow protocol=UDP localport=4191Security 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- Outdated versions with vulnerabilities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 4191/UDP?
Port 4191/UDP is associated with the dsmipv6 service. Dual Stack MIPv6 NAT Traversal
Is it safe to expose port 4191 to the Internet?
It depends on the service and configuration. Port 4191 (dsmipv6) 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 4191 is open?
You can use nmap: `nmap -p 4191 -sV example.com`, netcat: `nc -zv example.com 4191`, or the bash command: `(echo > /dev/udp/example.com/4191) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4191 on my firewall?
On Linux with UFW: `sudo ufw allow 4191/udp` (open) or `sudo ufw deny 4191/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4191 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4191" dir=in action=allow protocol=UDP localport=4191`.
What applications and services use port 4191?
Port 4191/UDP is used by the dsmipv6 service. Specific uses depend on the software and configuration. Check our related tools section for more information.