I used the new https://learning.postman.com/docs/sending-requests/supported-api-frameworks/websocket/ of postman to check a TCP connectivity to a remote host.
Using Test-NetConnection I got to know that the connection is successful.
Test-NetConnection 138.149.1.1 -Port 6021
The connectivity is failing and I am wondering was it due to misplaced port.
I passed the port like this .

Also I tried to send it as a Header parameter and a normal parameter , yet no avail .Any help is appreciated since this is a Beta feature of Postman. Also I tried below too.
hostname:port