All ports
Port3456/UDP
vatPort
3456
Protocol
UDP
Category
Registered
Service
vat
What is port 3456?
Port 3456/UDP is a Registered port, registered with IANA for specific applications. It is associated with the vat service.
VAT default data
Useful commands
nmapnmap -p 3456 -sV example.comnetcatnc -zv example.com 3456curlcurl -v http://example.com:3456/telnettelnet example.com 3456bash(echo > /dev/udp/example.com/3456) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3456/udpDeny
sudo ufw deny 3456/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3456 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3456 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3456/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3456" dir=in action=allow protocol=UDP localport=3456Security 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- Outdated versions with vulnerabilities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 3456/UDP?
Port 3456/UDP is associated with the vat service. VAT default data
Is it safe to expose port 3456 to the Internet?
It depends on the service and configuration. Port 3456 (vat) 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 3456 is open?
You can use nmap: `nmap -p 3456 -sV example.com`, netcat: `nc -zv example.com 3456`, or the bash command: `(echo > /dev/udp/example.com/3456) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3456 on my firewall?
On Linux with UFW: `sudo ufw allow 3456/udp` (open) or `sudo ufw deny 3456/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3456 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3456" dir=in action=allow protocol=UDP localport=3456`.
What applications and services use port 3456?
Port 3456/UDP is used by the vat service. Specific uses depend on the software and configuration. Check our related tools section for more information.