Konstantin Ryabtsev, administrat\u00f6ren f\u00f6r infrastrukturen kernel.org, har publicerat resultaten av analysen av trafiken fr\u00e5n tj\u00e4nsten git.kernel.org, som m\u00f6jligg\u00f6r visning av inneh\u00e5llet i git-repositorier relaterade till utvecklingen av Linux-k\u00e4rnan. Tj\u00e4nsten hanterar dagligen cirka 6 miljoner f\u00f6rfr\u00e5gningar om commit-information, varav 66% kommer fr\u00e5n bots som kan blockeras med hj\u00e4lp av systemet Anubis. 33% av f\u00f6rfr\u00e5gningarna passerar Anubis-systemets kontroll, som till\u00e5ter \u00e5tkomst endast efter att ha l\u00f6st en uppgift p\u00e5 JavaScript-spr\u00e5ket d\u00e4r SHA-256-hashen i kombination med en str\u00e4ng fr\u00e5n servern inneh\u00e5ller ett visst antal ledande nollor (denna uppgift kr\u00e4ver CPU-resurser f\u00f6r att l\u00f6sa, men kr\u00e4ver inga resurser f\u00f6r verifiering). <\/p>\n
Det \u00e4r om\u00f6jligt att exakt avg\u00f6ra vilka av dessa 33% som \u00e4r m\u00e4nniskor och vilka som \u00e4r avancerade bots, men baserat p\u00e5 karakt\u00e4ren av f\u00f6rfr\u00e5gningarna har vi dragit slutsatsen att den totala andelen legitima f\u00f6rfr\u00e5gningar \u00e4r omkring 2%, medan de andra 98% kommer fr\u00e5n skrappare. Ett av k\u00e4nnetecknen f\u00f6r bots \u00e4r direkta f\u00f6rfr\u00e5gningar om gamla commits i slumpm\u00e4ssiga gamla grenar, som det \u00e4r osannolikt att m\u00e4nniskor har behov av i sitt arbete. Botternas aktivitet skapar en enorm parasitisk belastning p\u00e5 servrar<\/a> Eftersom botar ist\u00e4llet f\u00f6r att ladda hela koden och historien av commits en g\u00e5ng via operationen «git clone» skickar ut miljarder f\u00f6rfr\u00e5gningar, och g\u00e5r igenom alla alternativ genom webbgr\u00e4nssnittet och upprepade g\u00e5nger fr\u00e5gar efter samma data med olika parametrar. <\/p>\n Blockering av bots genom IP-adresser<\/a> och autonoma system har snabbt slutat fungera, eftersom bots har \u00f6verg\u00e5tt till att skicka f\u00f6rfr\u00e5gningar fr\u00e5n miljontals slumpm\u00e4ssiga IP-adresser fr\u00e5n hemn\u00e4tverk eller mobila n\u00e4tverk, f\u00e5tt genom aktiviteter fr\u00e5n botn\u00e4tverk eller monetisering av webbl\u00e4sartill\u00e4gg. Fr\u00e5n varje adress skickas bara 4-5 f\u00f6rfr\u00e5gningar, s\u00e5 det \u00e4r meningsl\u00f6st att blockera dem p\u00e5 brandv\u00e4ggsniv\u00e5. <\/p>\n Under en tid hj\u00e4lpte systemet Anubis till att blockera bots, men med tiden har bots anpassat sig f\u00f6r att utf\u00f6ra de ber\u00e4kningar som Anubis erbjuder. Bland annat har bots l\u00e4rt sig att l\u00f6sa uppgiften av sv\u00e5righetsgrad 5, och det blir problematiskt att \u00f6ka sv\u00e5righetsgraden ytterligare, eftersom \u00e4ven den femte niv\u00e5n kr\u00e4ver flera sekunders ber\u00e4kningar och irriterar legitima anv\u00e4ndare kraftigt. <\/p>\n Som ett resultat g\u00e5r det \u00e5t fler resurser f\u00f6r att hantera f\u00f6rfr\u00e5gningar fr\u00e5n skrapprogram inom infrastrukturen p\u00e5 kernel.org \u00e4n f\u00f6r alla andra typer av legitima operationer, inklusive «git clone». P\u00e5 5 servrar<\/a>, som betj\u00e4nar git.kernel.org, \u00e4r 14-16 av de 90 CPU-k\u00e4rnorna vid varje given tidpunkt st\u00e4ndigt upptagna med att visa git-commits f\u00f6r botar. F\u00f6r att minska belastningen f\u00f6rs\u00f6ker administrat\u00f6rerna nu sk\u00e4ra ner tj\u00e4nstens m\u00f6jligheter, st\u00e4nga av vissa resurskr\u00e4vande operationer, begr\u00e4nsa anonym \u00e5tkomst och minska antalet l\u00e4nkar tillg\u00e4ngliga f\u00f6r navigering. \u041a\u043e\u043d\u0441\u0442\u0430\u043d\u0442\u0438\u043d \u0420\u044f\u0431\u0446\u0435\u0432, \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440 \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b kernel.org, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0430\u043d\u0430\u043b\u0438\u0437\u0430 \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u0441\u0435\u0440\u0432\u0438\u0441\u0430 git.kernel.org, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043f\u0440\u043e\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 git-\u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0435\u0432 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u044f\u0434\u0440\u0430 Linux. \u0415\u0436\u0435\u0434\u043d\u0435\u0432\u043d\u043e \u0441\u0435\u0440\u0432\u0438\u0441 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u043e\u043a\u043e\u043b\u043e 6 \u043c\u043b\u043d \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043e \u043a\u043e\u043c\u043c\u0438\u0442\u0430\u0445, \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 66% \u043f\u0440\u0438\u0445\u043e\u0434\u044f\u0442\u0441\u044f \u043d\u0430 \u0431\u043e\u0442\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0434\u0430\u0451\u0442\u0441\u044f \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Anubis. 33% \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043f\u0440\u043e\u0445\u043e\u0434\u044f\u0442 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Anubis, \u0440\u0430\u0437\u0440\u0435\u0448\u0430\u044e\u0449\u0435\u0439 \u0432\u0445\u043e\u0434 \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0441\u043b\u0435 \u043f\u043e\u0434\u0431\u043e\u0440\u0430 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-183180","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd4798% av f\u00f6rfr\u00e5gningarna till git.kernel.org genereras av botar, vilket skapar en enorm parasit\u00e4r belastning | ProHoster","description":"Konstantin Ryabtsev, administrat\u00f6r f\u00f6r infrastrukturen kernel.org, publicerade resultaten av en analys av trafiken till tj\u00e4nsten git.kernel.org, som m\u00f6jligg\u00f6r visning av inneh\u00e5llet i git-repositorier knutna till utvecklingen av 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K\u00e4lla: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"