How to allow access to the server by port?

Question

CentOS

Hello, I have a CentOS 7 server running npm Application on port 3000. On the server itself, the Application works (you can access it via localhost:3000 or mydomen.ru:3000), but from computers on the LAN at mydomen.ru:3000 (server address) it gives a "timeout" error. At the same time, ngnix and apache also work on the server, and it is available via mydomen.ru

Answer 1

Maybe you didn't configure firewalld or iptables corny.

Answer 2

try running the application on 0.0.0.0:3000
or in nginx/apache proxy requests to localhost:3000