Is it possible to use one port for Nginx virtual hosts?

Question

Nginx

Me so, for self-education. Now I just specify different ports for hosts. Tell me, pliz, can I specify one or not? And then how to destroy it. You can click on the manual, where to look)

Answer 1

For self-development, you need to read the documentation or at least google a dozen ready-made configurations and see.
Yes.

Answer 2

> You can click on the manual, where to look)
In HTTP/1.1 and above there is a mandatory header Host , which indicates the domain name of the site to which the request is made. Using it, the web server can always determine which virtual host the request came to:

The "Host" header field in a request provides the host and port information from the target URI, enabling the origin server to distinguish among resources while servicing requests for multiple host names on a single IP address.
.....
A client MUST send a Host header field in all HTTP/1.1 request messages.
Ports other than 80 are almost never used on the public web.
If, from the point of view of nginx, we look at the server_name directive , this is exactly what it was made for.

Answer 3

Hmm, everything looks outward through 80 and 443, inside through sockets.