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Non-Cloudflare AI blocking?
(lemmy.sdf.org)
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this post was submitted on 09 Jan 2025
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If you're running nginx I am using the following:
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|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|ClaudeBot|Bytespider|ImagesiftBot|Barkrowler|DataForSeoBo|Amazonbot|facebookexternalhit|meta-externalagent|FriendlyCrawler|GoogleOther|PetalBot|Applebot") { return 403; }That will block those that actually use recognisable user agents. I add any I find as I go on. It will catch a lot!
I also have a huuuuuge IP based block list (generated by adding all ranges returned from looking up the following AS numbers):
AS45102 (Alibaba cloud) AS136907 (Huawei SG) AS132203 (Tencent) AS32934 (Facebook)
Since these guys run or have run bots that impersonate real browser agents.
There are various tools online to return prefix/ip lists for an autonomous system number.
I put both into a single file and include it into my web site config files.
EDIT: Just to add, keeping on top of this is a full time job! EDIT 2: Removed Mojeek bot as it seems to be a normal web crawler.
why MojeekBot? we're a search engine
Hmm, I took an original list and added to it. You got a website I can check? If so I'll happily remove. I don't mind slow web crawlers at all.
if you have any recall on where the list came from that's also useful to us. Here's our Bot page: https://www.mojeek.com/bot.html and some external info: https://en.wikipedia.org/wiki/Mojeek
Didn't have the link to hand. But a search turned this one up: https://reggiodigital.com/blog/nginx-rule-blocking-bad-bots/ it looks to be the same list, and you can see the ones I've added to the end of that list.
thanks a lot for providing this 🙏