All ports
Port3540/TCP
pnrp-portPort
3540
Protocol
TCP
Category
Registered
Service
pnrp-port
What is port 3540?
Port 3540/TCP is a Registered port, registered with IANA for specific applications. It is associated with the pnrp-port service.
PNRP User Port
Useful commands
nmapnmap -p 3540 -sV example.comnetcatnc -zv example.com 3540curlcurl -v http://example.com:3540/telnettelnet example.com 3540bash(echo > /dev/tcp/example.com/3540) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3540/tcpDeny
sudo ufw deny 3540/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 3540 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 3540 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3540/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3540" dir=in action=allow protocol=TCP localport=3540Security 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- Outdated versions with vulnerabilities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 3540/TCP?
Port 3540/TCP is associated with the pnrp-port service. PNRP User Port
Is it safe to expose port 3540 to the Internet?
It depends on the service and configuration. Port 3540 (pnrp-port) 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 3540 is open?
You can use nmap: `nmap -p 3540 -sV example.com`, netcat: `nc -zv example.com 3540`, or the bash command: `(echo > /dev/tcp/example.com/3540) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3540 on my firewall?
On Linux with UFW: `sudo ufw allow 3540/tcp` (open) or `sudo ufw deny 3540/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 3540 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3540" dir=in action=allow protocol=TCP localport=3540`.
What applications and services use port 3540?
Port 3540/TCP is used by the pnrp-port service. Specific uses depend on the software and configuration. Check our related tools section for more information.