Port 190

gacp · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Servicegacp

Frequently asked questions

What is port 190 used for?

Port 190 is registered with the IANA for gacp (TCP/UDP). Description: Gateway Access Control Protocol.

Is port 190 a well-known port?

Yes. Port 190 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 190 is open?

Locally on Linux with ss -tulpn | grep ':190\b', on Windows with netstat -ano | findstr :190. To test a remote host use Test-NetConnection <host> -Port 190 in PowerShell or nc -zv <host> 190 on Linux/macOS.

How do I open port 190 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 190/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=190/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 190" -Direction Inbound -Protocol TCP -LocalPort 190 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPgacpGateway Access Control Protocol
UDPgacpGateway Access Control Protocol

Nearby entries