Connecting to Localhost on Mac from Another Mac: Websocket Issues?

I have a node.js web app running on http://localhost:3000/ on my iMac. I am able to log on to that web app from Chrome on my MacBook using the Wi-Fi IP address of my iMac (found in System Preferences->Network) and the port my web app is running on:

http://10.0.0.37:3000

When using this technique, is there any reason why a websocket would fail in calling a service on a distant server?

Thanks in advance to any thoughts!

via VikR