All ports
Port4754/UDP
gre-in-udpPort
4754
Protocol
UDP
Category
Registered
Service
gre-in-udp
What is port 4754?
Port 4754/UDP is a Registered port, registered with IANA for specific applications. It is associated with the gre-in-udp service.
GRE-in-UDP Encapsulation
Useful commands
nmapnmap -p 4754 -sV example.comnetcatnc -zv example.com 4754curlcurl -v http://example.com:4754/telnettelnet example.com 4754bash(echo > /dev/udp/example.com/4754) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4754/udpDeny
sudo ufw deny 4754/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4754 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4754 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4754/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4754" dir=in action=allow protocol=UDP localport=4754Security 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- Outdated versions with vulnerabilities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 4754/UDP?
Port 4754/UDP is associated with the gre-in-udp service. GRE-in-UDP Encapsulation
Is it safe to expose port 4754 to the Internet?
It depends on the service and configuration. Port 4754 (gre-in-udp) 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 4754 is open?
You can use nmap: `nmap -p 4754 -sV example.com`, netcat: `nc -zv example.com 4754`, or the bash command: `(echo > /dev/udp/example.com/4754) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4754 on my firewall?
On Linux with UFW: `sudo ufw allow 4754/udp` (open) or `sudo ufw deny 4754/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4754 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4754" dir=in action=allow protocol=UDP localport=4754`.
What applications and services use port 4754?
Port 4754/UDP is used by the gre-in-udp service. Specific uses depend on the software and configuration. Check our related tools section for more information.