All ports
Port3938/UDP
dbcontrol_agentPort
3938
Protocol
UDP
Category
Registered
Service
dbcontrol_agent
What is port 3938?
Port 3938/UDP is a Registered port, registered with IANA for specific applications. It is associated with the dbcontrol_agent service.
Oracle dbControl Agent po
Useful commands
nmapnmap -p 3938 -sV example.comnetcatnc -zv example.com 3938curlcurl -v http://example.com:3938/telnettelnet example.com 3938bash(echo > /dev/udp/example.com/3938) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3938/udpDeny
sudo ufw deny 3938/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3938 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3938 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3938/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3938" dir=in action=allow protocol=UDP localport=3938Security 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- Outdated versions with vulnerabilities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 3938/UDP?
Port 3938/UDP is associated with the dbcontrol_agent service. Oracle dbControl Agent po
Is it safe to expose port 3938 to the Internet?
It depends on the service and configuration. Port 3938 (dbcontrol_agent) 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 3938 is open?
You can use nmap: `nmap -p 3938 -sV example.com`, netcat: `nc -zv example.com 3938`, or the bash command: `(echo > /dev/udp/example.com/3938) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3938 on my firewall?
On Linux with UFW: `sudo ufw allow 3938/udp` (open) or `sudo ufw deny 3938/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3938 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3938" dir=in action=allow protocol=UDP localport=3938`.
What applications and services use port 3938?
Port 3938/UDP is used by the dbcontrol_agent service. Specific uses depend on the software and configuration. Check our related tools section for more information.