Manual:$wgInternalServer/pt

<translate> HTTP proxy (CDN) settings</translate>: $wgInternalServer
Internal server name as known to Squid, if different than `$wgServer` .
<translate> Introduced in version:</translate>	1.2.0
<translate> Removed in version:</translate>	<translate> still in use</translate>
<translate> Allowed values:</translate>	(URL string)
<translate> Default value:</translate>	`false`, falling back to $wgServer
<translate> Other settings:</translate> <translate> Alphabetical</translate> \| <translate> By function</translate>

Details

Internal server name as known to Varnish (or other CDN servers), if different from $wgServer . e.g.:

$wgInternalServer = 'http://yourproxyserver.tld:8000';