All ports
Port3739/TCP
launchbird-lmPort
3739
Protocol
TCP
Category
Registered
Service
launchbird-lm
What is port 3739?
Port 3739/TCP is a Registered port, registered with IANA for specific applications. It is associated with the launchbird-lm service.
Launchbird LicenseManager
Useful commands
nmapnmap -p 3739 -sV example.comnetcatnc -zv example.com 3739curlcurl -v http://example.com:3739/telnettelnet example.com 3739bash(echo > /dev/tcp/example.com/3739) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3739/tcpDeny
sudo ufw deny 3739/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 3739 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 3739 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3739/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3739" dir=in action=allow protocol=TCP localport=3739Security 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- Outdated versions with vulnerabilities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 3739/TCP?
Port 3739/TCP is associated with the launchbird-lm service. Launchbird LicenseManager
Is it safe to expose port 3739 to the Internet?
It depends on the service and configuration. Port 3739 (launchbird-lm) 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 3739 is open?
You can use nmap: `nmap -p 3739 -sV example.com`, netcat: `nc -zv example.com 3739`, or the bash command: `(echo > /dev/tcp/example.com/3739) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3739 on my firewall?
On Linux with UFW: `sudo ufw allow 3739/tcp` (open) or `sudo ufw deny 3739/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 3739 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3739" dir=in action=allow protocol=TCP localport=3739`.
What applications and services use port 3739?
Port 3739/TCP is used by the launchbird-lm service. Specific uses depend on the software and configuration. Check our related tools section for more information.