Can't reach Node.js testing from Chrome on a usb tethered Android device

I can't reach Node.js testing from a usb tethered Android device (Chrome) using IPv4 address.

Node hello world running on Win7 PC works great locally using computer name, IPv4 address, localhost, etc, etc. on ports 1337, 8080, etc.

No problems though reaching Apache in the same manner from Android (using IPv4 address)!

Is it a configuration issue?

Code :

var portNum = 8080;  //1337;
http.createServer(_handler).listen( portNum );