Protect wikis against crawler bots. CrawlerProtection denies anonymous user access to certain MediaWiki action URLs and SpecialPages which are resource intensive.

• $wgCrawlerProtectedSpecialPages - array of special pages to protect (default: [ 'mobilediff', 'recentchangeslinked', 'whatlinkshere' ]). Supported values are special page names or their aliases regardless of case. You do not need to use the 'Special:' prefix. Note that you can fetch a full list of SpecialPages defined by your wiki using the API and jq with a simple bash one-liner like curl -s "[YOURWIKI]api.php?action=query&meta=siteinfo&siprop=specialpagealiases&format=json" | jq -r '.query.specialpagealiases[].aliases[]' | sort Of course certain Specials MUST be allowed like Special:Login so do not block everything.
• $wgCrawlerProtectionUse418 - drop denied requests in a quick way via die(); with 418 I'm a teapot code (default: false)