Port 701

lmp · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Servicelmp
ReferenceRFC 4204

Frequently asked questions

What is port 701 used for?

Port 701 is registered with the IANA for lmp (TCP/UDP). Description: Link Management Protocol (LMP).

Is port 701 a well-known port?

Yes. Port 701 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 701 is open?

Locally on Linux with ss -tulpn | grep ':701\b', on Windows with netstat -ano | findstr :701. To test a remote host use Test-NetConnection <host> -Port 701 in PowerShell or nc -zv <host> 701 on Linux/macOS.

How do I open port 701 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 701/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=701/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 701" -Direction Inbound -Protocol TCP -LocalPort 701 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPlmpLink Management Protocol (LMP)
UDPlmpLink Management Protocol (LMP)

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