All ports
Port2666/UDP
extensisPort
2666
Protocol
UDP
Category
Registered
Service
extensis
What is port 2666?
Port 2666/UDP is a Registered port, registered with IANA for specific applications. It is associated with the extensis service.
extensis
Useful commands
nmapnmap -p 2666 -sV example.comnetcatnc -zv example.com 2666curlcurl -v http://example.com:2666/telnettelnet example.com 2666bash(echo > /dev/udp/example.com/2666) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2666/udpDeny
sudo ufw deny 2666/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 2666 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 2666 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2666/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2666" dir=in action=allow protocol=UDP localport=2666Security 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- Outdated versions with vulnerabilities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 2666/UDP?
Port 2666/UDP is associated with the extensis service. extensis
Is it safe to expose port 2666 to the Internet?
It depends on the service and configuration. Port 2666 (extensis) 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 2666 is open?
You can use nmap: `nmap -p 2666 -sV example.com`, netcat: `nc -zv example.com 2666`, or the bash command: `(echo > /dev/udp/example.com/2666) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2666 on my firewall?
On Linux with UFW: `sudo ufw allow 2666/udp` (open) or `sudo ufw deny 2666/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 2666 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2666" dir=in action=allow protocol=UDP localport=2666`.
What applications and services use port 2666?
Port 2666/UDP is used by the extensis service. Specific uses depend on the software and configuration. Check our related tools section for more information.