All ports
Port1939/UDP
jvserverPort
1939
Protocol
UDP
Category
Registered
Service
jvserver
What is port 1939?
Port 1939/UDP is a Registered port, registered with IANA for specific applications. It is associated with the jvserver service.
JetVision Server Port
Useful commands
nmapnmap -p 1939 -sV example.comnetcatnc -zv example.com 1939curlcurl -v http://example.com:1939/telnettelnet example.com 1939bash(echo > /dev/udp/example.com/1939) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1939/udpDeny
sudo ufw deny 1939/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 1939 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 1939 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1939/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1939" dir=in action=allow protocol=UDP localport=1939Security 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- Outdated versions with vulnerabilities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 1939/UDP?
Port 1939/UDP is associated with the jvserver service. JetVision Server Port
Is it safe to expose port 1939 to the Internet?
It depends on the service and configuration. Port 1939 (jvserver) 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 1939 is open?
You can use nmap: `nmap -p 1939 -sV example.com`, netcat: `nc -zv example.com 1939`, or the bash command: `(echo > /dev/udp/example.com/1939) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1939 on my firewall?
On Linux with UFW: `sudo ufw allow 1939/udp` (open) or `sudo ufw deny 1939/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 1939 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1939" dir=in action=allow protocol=UDP localport=1939`.
What applications and services use port 1939?
Port 1939/UDP is used by the jvserver service. Specific uses depend on the software and configuration. Check our related tools section for more information.