All ports
Port4869/UDP
phrelaydbgPort
4869
Protocol
UDP
Category
Registered
Service
phrelaydbg
What is port 4869?
Port 4869/UDP is a Registered port, registered with IANA for specific applications. It is associated with the phrelaydbg service.
Photon Relay Debug
Useful commands
nmapnmap -p 4869 -sV example.comnetcatnc -zv example.com 4869curlcurl -v http://example.com:4869/telnettelnet example.com 4869bash(echo > /dev/udp/example.com/4869) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4869/udpDeny
sudo ufw deny 4869/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4869 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4869 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4869/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4869" dir=in action=allow protocol=UDP localport=4869Security 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- Outdated versions with vulnerabilities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 4869/UDP?
Port 4869/UDP is associated with the phrelaydbg service. Photon Relay Debug
Is it safe to expose port 4869 to the Internet?
It depends on the service and configuration. Port 4869 (phrelaydbg) 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 4869 is open?
You can use nmap: `nmap -p 4869 -sV example.com`, netcat: `nc -zv example.com 4869`, or the bash command: `(echo > /dev/udp/example.com/4869) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4869 on my firewall?
On Linux with UFW: `sudo ufw allow 4869/udp` (open) or `sudo ufw deny 4869/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4869 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4869" dir=in action=allow protocol=UDP localport=4869`.
What applications and services use port 4869?
Port 4869/UDP is used by the phrelaydbg service. Specific uses depend on the software and configuration. Check our related tools section for more information.