Manual:$wgSquidServersNoPurge

HTTP proxy (CDN) settings: $wgSquidServersNoPurge
Same as $wgSquidServers , except that MW has no methods to send HTTP PURGE to an origin part of the configured ranges
Introduced in version:1.4.0
Deprecated in version:1.34.0 (Gerrit change 387877; git #f9f8dff4)
Removed in version:1.35.0 (Gerrit change 579755; git #e8d9d68b)
Allowed values:(IPv4 & IPv6 addresses and/or Classless Inter-Domain Routing (CIDR) blocks)
Default value:[]
Prior to 1.23 CIDR notation was not supported

Details edit

This variable is about telling MediaWiki an array of CIDR blocks where any IP address part of the range has to be considered as a Proxy server.

Same as $wgSquidServers , except that MW has no methods to send HTTP PURGE to an origin part of the configured ranges.

If you have individual IP addresses, refer to $wgSquidServers

All documentation in Manual:$wgSquidServers#Configuration example with Varnish is valid, but with difference described below.

// In LocalSettings.php
$wgUseSquid = true;
$wgSquidServersNoPurge = array();
$wgSquidServersNoPurge[] = "192.0.2.0/24";