All ports
Port67/UDP
bootpsPort
67
Protocol
UDP
Category
Well-Known
Service
bootps
What is port 67?
Port 67/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the bootps service.
Bootstrap Protocol Server
Useful commands
nmapnmap -p 67 -sV example.comnetcatnc -zv example.com 67curlcurl -v http://example.com:67/telnettelnet example.com 67bash(echo > /dev/udp/example.com/67) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 67/udpDeny
sudo ufw deny 67/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 67 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 67 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=67/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 67" dir=in action=allow protocol=UDP localport=67Security 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- Outdated versions with vulnerabilities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 67/UDP?
Port 67/UDP is associated with the bootps service. Bootstrap Protocol Server
Is it safe to expose port 67 to the Internet?
It depends on the service and configuration. Port 67 (bootps) 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 67 is open?
You can use nmap: `nmap -p 67 -sV example.com`, netcat: `nc -zv example.com 67`, or the bash command: `(echo > /dev/udp/example.com/67) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 67 on my firewall?
On Linux with UFW: `sudo ufw allow 67/udp` (open) or `sudo ufw deny 67/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 67 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 67" dir=in action=allow protocol=UDP localport=67`.
What applications and services use port 67?
Port 67/UDP is used by the bootps service. Specific uses depend on the software and configuration. Check our related tools section for more information.