All ports
Port171/TCP
multiplexPort
171
Protocol
TCP
Category
Well-Known
Service
multiplex
What is port 171?
Port 171/TCP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the multiplex service.
Network Innovations Multiplex
Useful commands
nmapnmap -p 171 -sV example.comnetcatnc -zv example.com 171curlcurl -v http://example.com:171/telnettelnet example.com 171bash(echo > /dev/tcp/example.com/171) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 171/tcpDeny
sudo ufw deny 171/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 171 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 171 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=171/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 171" dir=in action=allow protocol=TCP localport=171Security 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- Outdated versions with vulnerabilities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 171/TCP?
Port 171/TCP is associated with the multiplex service. Network Innovations Multiplex
Is it safe to expose port 171 to the Internet?
It depends on the service and configuration. Port 171 (multiplex) 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 171 is open?
You can use nmap: `nmap -p 171 -sV example.com`, netcat: `nc -zv example.com 171`, or the bash command: `(echo > /dev/tcp/example.com/171) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 171 on my firewall?
On Linux with UFW: `sudo ufw allow 171/tcp` (open) or `sudo ufw deny 171/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 171 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 171" dir=in action=allow protocol=TCP localport=171`.
What applications and services use port 171?
Port 171/TCP is used by the multiplex service. Specific uses depend on the software and configuration. Check our related tools section for more information.