All ports
Port652/UDP
hello-portPort
652
Protocol
UDP
Category
Well-Known
Service
hello-port
What is port 652?
Port 652/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the hello-port service.
HELLO_PORT
Useful commands
nmapnmap -p 652 -sV example.comnetcatnc -zv example.com 652curlcurl -v http://example.com:652/telnettelnet example.com 652bash(echo > /dev/udp/example.com/652) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 652/udpDeny
sudo ufw deny 652/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 652 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 652 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=652/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 652" dir=in action=allow protocol=UDP localport=652Security 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- Outdated versions with vulnerabilities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 652/UDP?
Port 652/UDP is associated with the hello-port service. HELLO_PORT
Is it safe to expose port 652 to the Internet?
It depends on the service and configuration. Port 652 (hello-port) 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 652 is open?
You can use nmap: `nmap -p 652 -sV example.com`, netcat: `nc -zv example.com 652`, or the bash command: `(echo > /dev/udp/example.com/652) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 652 on my firewall?
On Linux with UFW: `sudo ufw allow 652/udp` (open) or `sudo ufw deny 652/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 652 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 652" dir=in action=allow protocol=UDP localport=652`.
What applications and services use port 652?
Port 652/UDP is used by the hello-port service. Specific uses depend on the software and configuration. Check our related tools section for more information.