All ports
Port189/TCP
qftPort
189
Protocol
TCP
Category
Well-Known
Service
qft
What is port 189?
Port 189/TCP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the qft service.
Queued File Transport
Useful commands
nmapnmap -p 189 -sV example.comnetcatnc -zv example.com 189curlcurl -v http://example.com:189/telnettelnet example.com 189bash(echo > /dev/tcp/example.com/189) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 189/tcpDeny
sudo ufw deny 189/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 189 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 189 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=189/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 189" dir=in action=allow protocol=TCP localport=189Security 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- Outdated versions with vulnerabilities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 189/TCP?
Port 189/TCP is associated with the qft service. Queued File Transport
Is it safe to expose port 189 to the Internet?
It depends on the service and configuration. Port 189 (qft) 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 189 is open?
You can use nmap: `nmap -p 189 -sV example.com`, netcat: `nc -zv example.com 189`, or the bash command: `(echo > /dev/tcp/example.com/189) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 189 on my firewall?
On Linux with UFW: `sudo ufw allow 189/tcp` (open) or `sudo ufw deny 189/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 189 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 189" dir=in action=allow protocol=TCP localport=189`.
What applications and services use port 189?
Port 189/TCP is used by the qft service. Specific uses depend on the software and configuration. Check our related tools section for more information.