All ports
Port3667/UDP
infoexchPort
3667
Protocol
UDP
Category
Registered
Service
infoexch
What is port 3667?
Port 3667/UDP is a Registered port, registered with IANA for specific applications. It is associated with the infoexch service.
IBM Information Exchange
Useful commands
nmapnmap -p 3667 -sV example.comnetcatnc -zv example.com 3667curlcurl -v http://example.com:3667/telnettelnet example.com 3667bash(echo > /dev/udp/example.com/3667) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3667/udpDeny
sudo ufw deny 3667/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3667 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3667 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3667/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3667" dir=in action=allow protocol=UDP localport=3667Security 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- Outdated versions with vulnerabilities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 3667/UDP?
Port 3667/UDP is associated with the infoexch service. IBM Information Exchange
Is it safe to expose port 3667 to the Internet?
It depends on the service and configuration. Port 3667 (infoexch) 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 3667 is open?
You can use nmap: `nmap -p 3667 -sV example.com`, netcat: `nc -zv example.com 3667`, or the bash command: `(echo > /dev/udp/example.com/3667) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3667 on my firewall?
On Linux with UFW: `sudo ufw allow 3667/udp` (open) or `sudo ufw deny 3667/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3667 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3667" dir=in action=allow protocol=UDP localport=3667`.
What applications and services use port 3667?
Port 3667/UDP is used by the infoexch service. Specific uses depend on the software and configuration. Check our related tools section for more information.