All ports
Port2164/UDP
ddns-v3Port
2164
Protocol
UDP
Category
Registered
Service
ddns-v3
What is port 2164?
Port 2164/UDP is a Registered port, registered with IANA for specific applications. It is associated with the ddns-v3 service.
Dynamic DNS Version 3
Useful commands
nmapnmap -p 2164 -sV example.comnetcatnc -zv example.com 2164curlcurl -v http://example.com:2164/telnettelnet example.com 2164bash(echo > /dev/udp/example.com/2164) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2164/udpDeny
sudo ufw deny 2164/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 2164 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 2164 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2164/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2164" dir=in action=allow protocol=UDP localport=2164Security Risks
- DNS cache poisoning attacks
- DDoS amplification using open DNS resolvers
- Information disclosure of internal subdomains
- Domain hijacking if DNS server is misconfigured
Frequently Asked Questions
What service runs on port 2164/UDP?
Port 2164/UDP is associated with the ddns-v3 service. Dynamic DNS Version 3
Is it safe to expose port 2164 to the Internet?
It depends on the service and configuration. Port 2164 (ddns-v3) 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 2164 is open?
You can use nmap: `nmap -p 2164 -sV example.com`, netcat: `nc -zv example.com 2164`, or the bash command: `(echo > /dev/udp/example.com/2164) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2164 on my firewall?
On Linux with UFW: `sudo ufw allow 2164/udp` (open) or `sudo ufw deny 2164/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 2164 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2164" dir=in action=allow protocol=UDP localport=2164`.
What applications and services use port 2164?
Port 2164/UDP is used by the ddns-v3 service. Specific uses depend on the software and configuration. Check our related tools section for more information.