All ports
Port4129/UDP
nuauthPort
4129
Protocol
UDP
Category
Registered
Service
nuauth
What is port 4129?
Port 4129/UDP is a Registered port, registered with IANA for specific applications. It is associated with the nuauth service.
NuFW authentication protocol
Useful commands
nmapnmap -p 4129 -sV example.comnetcatnc -zv example.com 4129curlcurl -v http://example.com:4129/telnettelnet example.com 4129bash(echo > /dev/udp/example.com/4129) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4129/udpDeny
sudo ufw deny 4129/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4129 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4129 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4129/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4129" dir=in action=allow protocol=UDP localport=4129Security 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- Outdated versions with vulnerabilities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 4129/UDP?
Port 4129/UDP is associated with the nuauth service. NuFW authentication protocol
Is it safe to expose port 4129 to the Internet?
It depends on the service and configuration. Port 4129 (nuauth) 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 4129 is open?
You can use nmap: `nmap -p 4129 -sV example.com`, netcat: `nc -zv example.com 4129`, or the bash command: `(echo > /dev/udp/example.com/4129) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4129 on my firewall?
On Linux with UFW: `sudo ufw allow 4129/udp` (open) or `sudo ufw deny 4129/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4129 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4129" dir=in action=allow protocol=UDP localport=4129`.
What applications and services use port 4129?
Port 4129/UDP is used by the nuauth service. Specific uses depend on the software and configuration. Check our related tools section for more information.