All ports
Port555/TCP
dsfPort
555
Protocol
TCP
Category
Well-Known
Service
dsf
What is port 555?
Port 555/TCP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the dsf service.
Useful commands
nmapnmap -p 555 -sV example.comnetcatnc -zv example.com 555curlcurl -v http://example.com:555/telnettelnet example.com 555bash(echo > /dev/tcp/example.com/555) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 555/tcpDeny
sudo ufw deny 555/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 555 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 555 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=555/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 555" dir=in action=allow protocol=TCP localport=555Security 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- Outdated versions with vulnerabilities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 555/TCP?
Port 555/TCP is associated with the dsf service. No detailed description is available in the IANA registry.
Is it safe to expose port 555 to the Internet?
It depends on the service and configuration. Port 555 (dsf) 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 555 is open?
You can use nmap: `nmap -p 555 -sV example.com`, netcat: `nc -zv example.com 555`, or the bash command: `(echo > /dev/tcp/example.com/555) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 555 on my firewall?
On Linux with UFW: `sudo ufw allow 555/tcp` (open) or `sudo ufw deny 555/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 555 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 555" dir=in action=allow protocol=TCP localport=555`.
What applications and services use port 555?
Port 555/TCP is used by the dsf service. Specific uses depend on the software and configuration. Check our related tools section for more information.