All ports
Port4118/UDP
netscriptPort
4118
Protocol
UDP
Category
Registered
Service
netscript
What is port 4118?
Port 4118/UDP is a Registered port, registered with IANA for specific applications. It is associated with the netscript service.
Netadmin Systems NETscript service
Useful commands
nmapnmap -p 4118 -sV example.comnetcatnc -zv example.com 4118curlcurl -v http://example.com:4118/telnettelnet example.com 4118bash(echo > /dev/udp/example.com/4118) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4118/udpDeny
sudo ufw deny 4118/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4118 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4118 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4118/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4118" dir=in action=allow protocol=UDP localport=4118Security 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- Outdated versions with vulnerabilities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 4118/UDP?
Port 4118/UDP is associated with the netscript service. Netadmin Systems NETscript service
Is it safe to expose port 4118 to the Internet?
It depends on the service and configuration. Port 4118 (netscript) 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 4118 is open?
You can use nmap: `nmap -p 4118 -sV example.com`, netcat: `nc -zv example.com 4118`, or the bash command: `(echo > /dev/udp/example.com/4118) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4118 on my firewall?
On Linux with UFW: `sudo ufw allow 4118/udp` (open) or `sudo ufw deny 4118/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4118 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4118" dir=in action=allow protocol=UDP localport=4118`.
What applications and services use port 4118?
Port 4118/UDP is used by the netscript service. Specific uses depend on the software and configuration. Check our related tools section for more information.