Port 547

dhcpv6-server · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Servicedhcpv6-server
ReferenceRFC 5460, RFC 9915
Modified2018-05-21

Frequently asked questions

What is port 547 used for?

Port 547 is registered with the IANA for dhcpv6-server (TCP/UDP). Description: DHCPv6 Server.

Is port 547 a well-known port?

Yes. Port 547 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.

How do I check whether port 547 is open?

Locally on Linux with ss -tulpn | grep ':547\b', on Windows with netstat -ano | findstr :547. To test a remote host use Test-NetConnection <host> -Port 547 in PowerShell or nc -zv <host> 547 on Linux/macOS.

How do I open port 547 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 547/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=547/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 547" -Direction Inbound -Protocol TCP -LocalPort 547 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPdhcpv6-serverDHCPv6 Server
UDPdhcpv6-serverDHCPv6 Server

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