Restricting Access to php Page with Port

Question

I am doing a login environment and I would like this page to only answer an access port previously configured as "8080". I am using an apache server and it will be installed by me on the Linux machine.

Would this affect another site if maintained on the same apache server? No relation to this login system?

Answer 1

The first thing is to make sure that your web server is set to answer on the port you wish to have the login.

As you commented that you use Apache, the relevant configuration is here:

https://httpd.apache.org/docs/current/bind.html

Basically, to answer on different doors, you can adjust the listen:

Listen 80
Listen 8080

Or if the application meets different Ips and different ports:

Listen 192.0.2.1:80
Listen 192.0.2.5:8080

Remembering that if the application of one port is different from the other, you can configure virtualhosts (Listen has to be open to all doors it will use):

<VirtualHost *:80>
    DocumentRoot /www/caminho_para_o_site
</VirtualHost>
<VirtualHost *:8080>
    DocumentRoot /www/caminho_para_o_painel
</VirtualHost>

https://httpd.apache.org/docs/2.2/vhosts/examples.html

In case you don’t want to complicate, and the panel will be hosted next to the main website, you can use the information at $_SERVER['SERVER_PORT'] to know if the door used is the correct one:

See a simplified example:

<?php
   if( $_SERVER['SERVER_PORT'] != 8080 ) {
       echo '<h1>Porta n&atilde;o autorizada</h1>';
       // faz o que quiser aqui, no caso da porta estar errada
       // pode simular um 404, ou redirecionar pra onde achar melhor

       die(); // Importantissimo garantir que o script termine aqui
   }

   ... aqui continua sua página ...

Now, if you set up this part of the site to serve only on the 8080, the test itself is unnecessary. You need to analyze within your concrete situation to determine the best way.