All ports
Port3671/UDP
efcpPort
3671
Protocol
UDP
Category
Registered
Service
efcp
What is port 3671?
Port 3671/UDP is a Registered port, registered with IANA for specific applications. It is associated with the efcp service.
e Field Control (EIBnet)
Useful commands
nmapnmap -p 3671 -sV example.comnetcatnc -zv example.com 3671curlcurl -v http://example.com:3671/telnettelnet example.com 3671bash(echo > /dev/udp/example.com/3671) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3671/udpDeny
sudo ufw deny 3671/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3671 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3671 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3671/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3671" dir=in action=allow protocol=UDP localport=3671Security 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- Outdated versions with vulnerabilities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 3671/UDP?
Port 3671/UDP is associated with the efcp service. e Field Control (EIBnet)
Is it safe to expose port 3671 to the Internet?
It depends on the service and configuration. Port 3671 (efcp) 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 3671 is open?
You can use nmap: `nmap -p 3671 -sV example.com`, netcat: `nc -zv example.com 3671`, or the bash command: `(echo > /dev/udp/example.com/3671) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3671 on my firewall?
On Linux with UFW: `sudo ufw allow 3671/udp` (open) or `sudo ufw deny 3671/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3671 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3671" dir=in action=allow protocol=UDP localport=3671`.
What applications and services use port 3671?
Port 3671/UDP is used by the efcp service. Specific uses depend on the software and configuration. Check our related tools section for more information.