NodeJs/Nginx Windows 10, only accessible from localhost

I need to deploy a NodeJs server to monitor my Win10 PC. It uses express & socket.io. I'm stuck on exposing API to other lan equipments. I can only acess it from localhost, same thing with basic file serving or proxy pass with nginx... I tried a lot of potential solutions but no one works.

• Windows firewall ports are opened for the ports i use.
• NodeJS and Nginx are fully authorized in firewall
• NodeJS listen all ips: app.listen(4242, '0.0.0.0')

via Zaphod