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

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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";