Nginx Rule for Blocking Bad Bots

Some bots can be aggressive with their crawlers. This can negatively impact your visits with your hosting provider, and consumes resources thus slowing down the site. Here’s how to block them.

The nice thing about this Nginx rule is that it’s blocking it from the server level. I often see folks add blocking rules via a WordPress plugin, however that still hits the site and requires additional resources. This code stops the bot from ever reaching the site before it touches WordPress.

Note that there may be a legitimate crawler here that you use. Specifically with SEMrush and Ahrefs as they are common bots for their services. If you use any of these services, be sure to remove them from the list.

Not sure how to add these? You’ll want to ask your hosting provider to add these for you or provide instructions on how to add it. If you’re a Reggio Digital customer, reach out to support and we can help with that.

if ($http_user_agent ~* "SemrushBot|Semrush|AhrefsBot|MJ12bot|YandexBot|YandexImages|MegaIndex.ru|BLEXbot|BLEXBot|ZoominfoBot|YaK|VelenPublicWebCrawler|SentiBot|Vagabondo|SEOkicks|SEOkicks-Robot|mtbot/1.1.0i|SeznamBot|DotBot|Cliqzbot|coccocbot|python|Scrap|SiteCheck-sitecrawl|MauiBot|Java|GumGum|Clickagy|AspiegelBot|Yandex|TkBot|CCBot|Qwantify|MBCrawler|serpstatbot|AwarioSmartBot|Semantici|ScholarBot|proximic|MojeekBot|GrapeshotCrawler|IAScrawler|linkdexbot|contxbot|PlurkBot|PaperLiBot|BomboraBot|Leikibot|weborama-fetcher|NTENTbot|Screaming Frog SEO Spider|admantx-usaspb|Eyeotabot|VoluumDSP-content-bot|SirdataBot|adbeat_bot|TTD-Content|admantx|Nimbostratus-Bot|Mail.RU_Bot|Quantcastboti|Onespot-ScraperBot|Taboolabot|Baidu|Jobboerse|VoilaBot|Sogou|Jyxobot|Exabot|ZGrab|Proximi|Sosospider|Accoona|aiHitBot|Genieo|BecomeBot|ConveraCrawler|NerdyBot|OutclicksBot|findlinks|JikeSpider|Gigabot|CatchBot|Huaweisymantecspider|Offline Explorer|SiteSnagger|TeleportPro|WebCopier|WebReaper|WebStripper|WebZIP|Xaldon_WebSpider|BackDoorBot|AITCSRoboti|Arachnophilia|BackRub|BlowFishi|perl|CherryPicker|CyberSpyder|EmailCollector|Foobot|GetURL|httplib|HTTrack|LinkScan|Openbot|Snooper|SuperBot|URLSpiderPro|MAZBot|EchoboxBot|SerendeputyBot|LivelapBot|linkfluence.com|TweetmemeBot|LinkisBot|CrowdTanglebot") { return 403; }

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