Port 4900

hfcs · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicehfcs
Registered2006-03-02
Modified2014-02-02

Frequently asked questions

What is port 4900 used for?

Port 4900 is registered with the IANA for hfcs (TCP/UDP). Description: HFSQL Client/Server Database Engine.

Is port 4900 a well-known port?

No. Port 4900 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4900 is open?

Locally on Linux with ss -tulpn | grep ':4900\b', on Windows with netstat -ano | findstr :4900. To test a remote host use Test-NetConnection <host> -Port 4900 in PowerShell or nc -zv <host> 4900 on Linux/macOS.

How do I open port 4900 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4900/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4900/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4900" -Direction Inbound -Protocol TCP -LocalPort 4900 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPhfcsHFSQL Client/Server Database Engine
UDPhfcsHFSQL Client/Server Database Engine

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