All ports
Port4690/UDP
preludePort
4690
Protocol
UDP
Category
Registered
Service
prelude
What is port 4690?
Port 4690/UDP is a Registered port, registered with IANA for specific applications. It is associated with the prelude service.
Prelude IDS message proto
Useful commands
nmapnmap -p 4690 -sV example.comnetcatnc -zv example.com 4690curlcurl -v http://example.com:4690/telnettelnet example.com 4690bash(echo > /dev/udp/example.com/4690) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4690/udpDeny
sudo ufw deny 4690/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4690 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4690 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4690/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4690" dir=in action=allow protocol=UDP localport=4690Security 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- Outdated versions with vulnerabilities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 4690/UDP?
Port 4690/UDP is associated with the prelude service. Prelude IDS message proto
Is it safe to expose port 4690 to the Internet?
It depends on the service and configuration. Port 4690 (prelude) 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 4690 is open?
You can use nmap: `nmap -p 4690 -sV example.com`, netcat: `nc -zv example.com 4690`, or the bash command: `(echo > /dev/udp/example.com/4690) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4690 on my firewall?
On Linux with UFW: `sudo ufw allow 4690/udp` (open) or `sudo ufw deny 4690/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4690 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4690" dir=in action=allow protocol=UDP localport=4690`.
What applications and services use port 4690?
Port 4690/UDP is used by the prelude service. Specific uses depend on the software and configuration. Check our related tools section for more information.