All ports
Port21554/TCP
dfserverPort
21554
Protocol
TCP
Category
Registered
Service
dfserver
What is port 21554?
Port 21554/TCP is a Registered port, registered with IANA for specific applications. It is associated with the dfserver service.
MineScape Design File Server
Useful commands
nmapnmap -p 21554 -sV example.comnetcatnc -zv example.com 21554curlcurl -v http://example.com:21554/telnettelnet example.com 21554bash(echo > /dev/tcp/example.com/21554) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 21554/tcpDeny
sudo ufw deny 21554/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 21554 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 21554 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=21554/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 21554" dir=in action=allow protocol=TCP localport=21554Security 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- Outdated versions with vulnerabilities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 21554/TCP?
Port 21554/TCP is associated with the dfserver service. MineScape Design File Server
Is it safe to expose port 21554 to the Internet?
It depends on the service and configuration. Port 21554 (dfserver) 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 21554 is open?
You can use nmap: `nmap -p 21554 -sV example.com`, netcat: `nc -zv example.com 21554`, or the bash command: `(echo > /dev/tcp/example.com/21554) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 21554 on my firewall?
On Linux with UFW: `sudo ufw allow 21554/tcp` (open) or `sudo ufw deny 21554/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 21554 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 21554" dir=in action=allow protocol=TCP localport=21554`.
What applications and services use port 21554?
Port 21554/TCP is used by the dfserver service. Specific uses depend on the software and configuration. Check our related tools section for more information.