All ports
Port3911/UDP
prnstatusPort
3911
Protocol
UDP
Category
Registered
Service
prnstatus
What is port 3911?
Port 3911/UDP is a Registered port, registered with IANA for specific applications. It is associated with the prnstatus service.
Printer Status Port
Useful commands
nmapnmap -p 3911 -sV example.comnetcatnc -zv example.com 3911curlcurl -v http://example.com:3911/telnettelnet example.com 3911bash(echo > /dev/udp/example.com/3911) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 3911/udpDeny
sudo ufw deny 3911/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 3911 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 3911 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=3911/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 3911" dir=in action=allow protocol=UDP localport=3911Security 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- Outdated versions with vulnerabilities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 3911/UDP?
Port 3911/UDP is associated with the prnstatus service. Printer Status Port
Is it safe to expose port 3911 to the Internet?
It depends on the service and configuration. Port 3911 (prnstatus) 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 3911 is open?
You can use nmap: `nmap -p 3911 -sV example.com`, netcat: `nc -zv example.com 3911`, or the bash command: `(echo > /dev/udp/example.com/3911) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 3911 on my firewall?
On Linux with UFW: `sudo ufw allow 3911/udp` (open) or `sudo ufw deny 3911/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 3911 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 3911" dir=in action=allow protocol=UDP localport=3911`.
What applications and services use port 3911?
Port 3911/UDP is used by the prnstatus service. Specific uses depend on the software and configuration. Check our related tools section for more information.