All ports
Port744/TCP
flexlmPort
744
Protocol
TCP
Category
Well-Known
Service
flexlm
What is port 744?
Port 744/TCP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the flexlm service.
Flexible License Manager
Useful commands
nmapnmap -p 744 -sV example.comnetcatnc -zv example.com 744curlcurl -v http://example.com:744/telnettelnet example.com 744bash(echo > /dev/tcp/example.com/744) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 744/tcpDeny
sudo ufw deny 744/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 744 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 744 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=744/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 744" dir=in action=allow protocol=TCP localport=744Security 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- Outdated versions with vulnerabilities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 744/TCP?
Port 744/TCP is associated with the flexlm service. Flexible License Manager
Is it safe to expose port 744 to the Internet?
It depends on the service and configuration. Port 744 (flexlm) 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 744 is open?
You can use nmap: `nmap -p 744 -sV example.com`, netcat: `nc -zv example.com 744`, or the bash command: `(echo > /dev/tcp/example.com/744) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 744 on my firewall?
On Linux with UFW: `sudo ufw allow 744/tcp` (open) or `sudo ufw deny 744/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 744 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 744" dir=in action=allow protocol=TCP localport=744`.
What applications and services use port 744?
Port 744/TCP is used by the flexlm service. Specific uses depend on the software and configuration. Check our related tools section for more information.