EDIT: I was stuck in this situation before but then it was Apache-related But this time I'm using NodeJS, so the old answer doesn't help.

I'm running apache a NodeJS webserver (on port 80) on Windows 7. I want to access the webserver through my mobile which shares the wifi router with my pc locally.

http://localhost works from PC.

But I can't access http://192.168.1.4 from either my phone or even my computer.

ipconfig /all on my computer lists my ip address as 192.168.1.4

Wireless LAN adapter Wireless Network Connection:
    IPv4 Address. . . . . . . . . . . : 192.168.1.4(Preferred)

I can ping my phone's (internal) ip address [192.168.1.5] from PC and vice-versa, I can ping my PC [192.168.1.4] from my phone.

So why can't I access http://192.168.1.4 from my phone? (or PC)

Firewall is off.