Port 3784

bfd-control · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicebfd-control
ReferenceRFC 5881

Frequently asked questions

What is port 3784 used for?

Port 3784 is registered with the IANA for bfd-control (TCP/UDP). Description: BFD Control Protocol.

Is port 3784 a well-known port?

No. Port 3784 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3784 is open?

Locally on Linux with ss -tulpn | grep ':3784\b', on Windows with netstat -ano | findstr :3784. To test a remote host use Test-NetConnection <host> -Port 3784 in PowerShell or nc -zv <host> 3784 on Linux/macOS.

How do I open port 3784 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3784/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3784/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3784" -Direction Inbound -Protocol TCP -LocalPort 3784 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPbfd-controlBFD Control Protocol
UDPbfd-controlBFD Control Protocol

Nearby entries