All ports
Port1940/UDP
jvclientPort
1940
Protocol
UDP
Category
Registered
Service
jvclient
What is port 1940?
Port 1940/UDP is a Registered port, registered with IANA for specific applications. It is associated with the jvclient service.
JetVision Client Port
Useful commands
nmapnmap -p 1940 -sV example.comnetcatnc -zv example.com 1940curlcurl -v http://example.com:1940/telnettelnet example.com 1940bash(echo > /dev/udp/example.com/1940) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1940/udpDeny
sudo ufw deny 1940/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 1940 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 1940 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1940/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1940" dir=in action=allow protocol=UDP localport=1940Security 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- Outdated versions with vulnerabilities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 1940/UDP?
Port 1940/UDP is associated with the jvclient service. JetVision Client Port
Is it safe to expose port 1940 to the Internet?
It depends on the service and configuration. Port 1940 (jvclient) 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 1940 is open?
You can use nmap: `nmap -p 1940 -sV example.com`, netcat: `nc -zv example.com 1940`, or the bash command: `(echo > /dev/udp/example.com/1940) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1940 on my firewall?
On Linux with UFW: `sudo ufw allow 1940/udp` (open) or `sudo ufw deny 1940/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 1940 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1940" dir=in action=allow protocol=UDP localport=1940`.
What applications and services use port 1940?
Port 1940/UDP is used by the jvclient service. Specific uses depend on the software and configuration. Check our related tools section for more information.