All ports
Port216/TCP
CAIlicPort
216
Protocol
TCP
Category
Well-Known
Service
CAIlic
What is port 216?
Port 216/TCP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the CAIlic service.
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Useful commands
nmapnmap -p 216 -sV example.comnetcatnc -zv example.com 216curlcurl -v http://example.com:216/telnettelnet example.com 216bash(echo > /dev/tcp/example.com/216) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 216/tcpDeny
sudo ufw deny 216/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 216 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 216 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=216/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 216" dir=in action=allow protocol=TCP localport=216Security 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- Outdated versions with vulnerabilities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 216/TCP?
Port 216/TCP is associated with the CAIlic service. Computer Associates Int'l License Server
Is it safe to expose port 216 to the Internet?
It depends on the service and configuration. Port 216 (CAIlic) is a Well-Known 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 216 is open?
You can use nmap: `nmap -p 216 -sV example.com`, netcat: `nc -zv example.com 216`, or the bash command: `(echo > /dev/tcp/example.com/216) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 216 on my firewall?
On Linux with UFW: `sudo ufw allow 216/tcp` (open) or `sudo ufw deny 216/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 216 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 216" dir=in action=allow protocol=TCP localport=216`.
What applications and services use port 216?
Port 216/TCP is used by the CAIlic service. Specific uses depend on the software and configuration. Check our related tools section for more information.