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On a computer with Windows 7 there is a blocking all websites except those are specified in the file C:\Windows\System32\drivers\etc\hosts which serves as "DNS" like

123.456.789.123 example.com

and DNS in network adapter settings are switched to 127.0.0.1

As I see in wp-admin/includes/theme.php, free available WP themes in admin panel on pages "Themes > Add new" and "Customize > Change > WordPress.org themes" are loaded from the url api.wordpress.org. But this url is not mentioned in the hosts file.

So how can it be possible the themes are still loaded?

If I remove in wp-includes/class-http.php inside of the function request() the lines

$proxy = new WP_HTTP_Proxy();
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) {
    // ...
}

nothing changes and themes continue to load, so the proxy is not used.

How themes are loaded from api.wordpress.org bypassing DNS?

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  • Do you mean the computer that has blocking set up is your own computer, or do you mean it's the actual server where your WordPress install is hosted?
    – WebElaine
    Commented Jul 3, 2018 at 19:46
  • Also, be aware that any changes you might make to wp-includes/class-http.php or any other core file will be overwritten on any WP update. Don't Hack Core, as they say.
    – Pat J
    Commented Jul 3, 2018 at 21:25

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