All ports
Port744/UDP
flexlmPort
744
Protocol
UDP
Category
Well-Known
Service
flexlm
What is port 744?
Port 744/UDP 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/udp/example.com/744) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 744/udpDeny
sudo ufw deny 744/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 744 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 744 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=744/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 744" dir=in action=allow protocol=UDP 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- Outdated versions with vulnerabilities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/UDP?
Port 744/UDP 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/udp/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/udp` (open) or `sudo ufw deny 744/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 744 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 744" dir=in action=allow protocol=UDP localport=744`.
What applications and services use port 744?
Port 744/UDP is used by the flexlm service. Specific uses depend on the software and configuration. Check our related tools section for more information.