Port 4787

sia-ctrl-plane · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicesia-ctrl-plane
Registered2009-10-29

Frequently asked questions

What is port 4787 used for?

Port 4787 is registered with the IANA for sia-ctrl-plane (TCP/UDP). Description: Service Insertion Architecture (SIA) Control-Plane; Reserved.

Is port 4787 a well-known port?

No. Port 4787 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4787 is open?

Locally on Linux with ss -tulpn | grep ':4787\b', on Windows with netstat -ano | findstr :4787. To test a remote host use Test-NetConnection <host> -Port 4787 in PowerShell or nc -zv <host> 4787 on Linux/macOS.

How do I open port 4787 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4787/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4787/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4787" -Direction Inbound -Protocol TCP -LocalPort 4787 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPsia-ctrl-planeService Insertion Architecture (SIA) Control-Plane
UDP–Reserved

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