I have a question about the port (nginx+apache)

[silhwang]

When you run apache alone, you need 80 ports open.

But when using the nginx+apache combination, do the ports 8181 and 8443 need to be open?

These two ports are closed in my firewall.

But the web is still working.

How can this happen?

[aakrutitech]

It uses Proxypass to forward requests to the 8181 port. Any request on ort 80 will be internally passed to 8181

Your request ----->  Port 80 ------> Proxy pass -----> Redirect 8181 (Internally redirected) -------> load Data from Port 8181