All ports
Port546/UDP
dhcpv6-clientPort
546
Protocol
UDP
Category
Well-Known
Service
dhcpv6-client
What is port 546?
Port 546/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the dhcpv6-client service.
DHCPv6 Client
Useful commands
nmapnmap -p 546 -sV example.comnetcatnc -zv example.com 546curlcurl -v http://example.com:546/telnettelnet example.com 546bash(echo > /dev/udp/example.com/546) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 546/udpDeny
sudo ufw deny 546/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 546 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 546 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=546/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 546" dir=in action=allow protocol=UDP localport=546Security 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- Outdated versions with vulnerabilities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 546/UDP?
Port 546/UDP is associated with the dhcpv6-client service. DHCPv6 Client
Is it safe to expose port 546 to the Internet?
It depends on the service and configuration. Port 546 (dhcpv6-client) 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 546 is open?
You can use nmap: `nmap -p 546 -sV example.com`, netcat: `nc -zv example.com 546`, or the bash command: `(echo > /dev/udp/example.com/546) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 546 on my firewall?
On Linux with UFW: `sudo ufw allow 546/udp` (open) or `sudo ufw deny 546/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 546 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 546" dir=in action=allow protocol=UDP localport=546`.
What applications and services use port 546?
Port 546/UDP is used by the dhcpv6-client service. Specific uses depend on the software and configuration. Check our related tools section for more information.