Port 67

bootps · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Servicebootps
ReferenceRFC 951

Frequently asked questions

What is port 67 used for?

Port 67 is registered with the IANA for bootps (TCP/UDP). Description: Bootstrap Protocol Server.

Is port 67 a well-known port?

Yes. Port 67 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 67 is open?

Locally on Linux with ss -tulpn | grep ':67\b', on Windows with netstat -ano | findstr :67. To test a remote host use Test-NetConnection <host> -Port 67 in PowerShell or nc -zv <host> 67 on Linux/macOS.

How do I open port 67 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 67/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=67/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 67" -Direction Inbound -Protocol TCP -LocalPort 67 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPbootpsBootstrap Protocol Server
UDPbootpsBootstrap Protocol Server

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