All ports
Port4303/UDP
srcpPort
4303
Protocol
UDP
Category
Registered
Service
srcp
What is port 4303?
Port 4303/UDP is a Registered port, registered with IANA for specific applications. It is associated with the srcp service.
Simple Railroad Command Protocol
Useful commands
nmapnmap -p 4303 -sV example.comnetcatnc -zv example.com 4303curlcurl -v http://example.com:4303/telnettelnet example.com 4303bash(echo > /dev/udp/example.com/4303) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4303/udpDeny
sudo ufw deny 4303/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4303 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4303 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4303/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4303" dir=in action=allow protocol=UDP localport=4303Security 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- Outdated versions with vulnerabilities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 4303/UDP?
Port 4303/UDP is associated with the srcp service. Simple Railroad Command Protocol
Is it safe to expose port 4303 to the Internet?
It depends on the service and configuration. Port 4303 (srcp) 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 4303 is open?
You can use nmap: `nmap -p 4303 -sV example.com`, netcat: `nc -zv example.com 4303`, or the bash command: `(echo > /dev/udp/example.com/4303) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4303 on my firewall?
On Linux with UFW: `sudo ufw allow 4303/udp` (open) or `sudo ufw deny 4303/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4303 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4303" dir=in action=allow protocol=UDP localport=4303`.
What applications and services use port 4303?
Port 4303/UDP is used by the srcp service. Specific uses depend on the software and configuration. Check our related tools section for more information.