All ports
Port247/UDP
subntbcst_tftpPort
247
Protocol
UDP
Category
Well-Known
Service
subntbcst_tftp
What is port 247?
Port 247/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the subntbcst_tftp service.
SUBNTBCST_TFTP
Useful commands
nmapnmap -p 247 -sV example.comnetcatnc -zv example.com 247curlcurl -v http://example.com:247/telnettelnet example.com 247bash(echo > /dev/udp/example.com/247) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 247/udpDeny
sudo ufw deny 247/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 247 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 247 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=247/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 247" dir=in action=allow protocol=UDP localport=247Security 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- Outdated versions with vulnerabilities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 247/UDP?
Port 247/UDP is associated with the subntbcst_tftp service. SUBNTBCST_TFTP
Is it safe to expose port 247 to the Internet?
It depends on the service and configuration. Port 247 (subntbcst_tftp) 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 247 is open?
You can use nmap: `nmap -p 247 -sV example.com`, netcat: `nc -zv example.com 247`, or the bash command: `(echo > /dev/udp/example.com/247) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 247 on my firewall?
On Linux with UFW: `sudo ufw allow 247/udp` (open) or `sudo ufw deny 247/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 247 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 247" dir=in action=allow protocol=UDP localport=247`.
What applications and services use port 247?
Port 247/UDP is used by the subntbcst_tftp service. Specific uses depend on the software and configuration. Check our related tools section for more information.