Manual:$wgUsePrivateIPs/ja

詳細
Determines whether MediaWiki will trust an X-Forwarded-For (XFF) header specifying a private IP in requests from a trusted forwarding proxy. を設定すると、XFF ヘッダー内のプライベート IP アドレスは無視されます.

A trusted forwarding proxy is any proxy listed in either ( prior to 1.34) or   (  prior to 1.34). Extensions can also mark proxies as trusted via the  hook.

So if you have two traffic managers (Might be Zeus or F5) sending requests to your webservers, forwarding from an internal network, the config might be this: