All ports
Port52/UDP
xns-timePort
52
Protocol
UDP
Category
Well-Known
Service
xns-time
What is port 52?
Port 52/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the xns-time service.
XNS Time Protocol
Useful commands
nmapnmap -p 52 -sV example.comnetcatnc -zv example.com 52curlcurl -v http://example.com:52/telnettelnet example.com 52bash(echo > /dev/udp/example.com/52) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 52/udpDeny
sudo ufw deny 52/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 52 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 52 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=52/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 52" dir=in action=allow protocol=UDP localport=52Security 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- Outdated versions with vulnerabilities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 52/UDP?
Port 52/UDP is associated with the xns-time service. XNS Time Protocol
Is it safe to expose port 52 to the Internet?
It depends on the service and configuration. Port 52 (xns-time) 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 52 is open?
You can use nmap: `nmap -p 52 -sV example.com`, netcat: `nc -zv example.com 52`, or the bash command: `(echo > /dev/udp/example.com/52) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 52 on my firewall?
On Linux with UFW: `sudo ufw allow 52/udp` (open) or `sudo ufw deny 52/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 52 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 52" dir=in action=allow protocol=UDP localport=52`.
What applications and services use port 52?
Port 52/UDP is used by the xns-time service. Specific uses depend on the software and configuration. Check our related tools section for more information.