Port 4784

bfd-multi-ctl · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicebfd-multi-ctl
Registered2006-02

Frequently asked questions

What is port 4784 used for?

Port 4784 is registered with the IANA for bfd-multi-ctl (TCP/UDP). Description: BFD Multihop Control.

Is port 4784 a well-known port?

No. Port 4784 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4784 is open?

Locally on Linux with ss -tulpn | grep ':4784\b', on Windows with netstat -ano | findstr :4784. To test a remote host use Test-NetConnection <host> -Port 4784 in PowerShell or nc -zv <host> 4784 on Linux/macOS.

How do I open port 4784 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4784/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4784/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4784" -Direction Inbound -Protocol TCP -LocalPort 4784 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPbfd-multi-ctlBFD Multihop Control
UDPbfd-multi-ctlBFD Multihop Control

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