All ports
Port489/TCP
nest-protocolPort
489
Protocol
TCP
Category
Well-Known
Service
nest-protocol
What is port 489?
Port 489/TCP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the nest-protocol service.
nest-protocol
Useful commands
nmapnmap -p 489 -sV example.comnetcatnc -zv example.com 489curlcurl -v http://example.com:489/telnettelnet example.com 489bash(echo > /dev/tcp/example.com/489) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 489/tcpDeny
sudo ufw deny 489/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 489 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 489 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=489/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 489" dir=in action=allow protocol=TCP localport=489Security 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- Outdated versions with vulnerabilities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 489/TCP?
Port 489/TCP is associated with the nest-protocol service. nest-protocol
Is it safe to expose port 489 to the Internet?
It depends on the service and configuration. Port 489 (nest-protocol) is a Well-Known 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 489 is open?
You can use nmap: `nmap -p 489 -sV example.com`, netcat: `nc -zv example.com 489`, or the bash command: `(echo > /dev/tcp/example.com/489) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 489 on my firewall?
On Linux with UFW: `sudo ufw allow 489/tcp` (open) or `sudo ufw deny 489/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 489 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 489" dir=in action=allow protocol=TCP localport=489`.
What applications and services use port 489?
Port 489/TCP is used by the nest-protocol service. Specific uses depend on the software and configuration. Check our related tools section for more information.