Constantin Riab\u021bev, administrator of the infrastructure at kernel.org, published the traffic analysis results for the service git.kernel.org, which allows viewing the contents of git repositories related to the development of the Linux kernel. The service processes about 6 million requests for commit information daily, of which 66% come from bots that can be blocked using the Anubis system. 33% of the requests pass through the Anubis system, allowing entry only after solving a JavaScript challenge where the SHA-256 hash in combination with a server-issued string contains a specific number of leading zeros (this task requires CPU resources to solve, but not for verification). <\/p>\n
It is impossible to precisely determine who among these 33% are humans and who are advanced bots, but based on the nature of the requests, it is concluded that the overall share of legitimate requests is about 2%, while the remaining 98% come from scrapers. One sign of bots is direct requests for old commits in random old branches, which people are unlikely to need in their work. Bot activity creates an immense parasitic load on servere<\/a> deoarece, \u00een loc s\u0103 \u00eencarce o dat\u0103 tot codul \u0219i istoricul commit-urilor prin opera\u021biunea «git clone», botii trimit miliarde de solicit\u0103ri, explor\u00e2nd toate variantele de acces prin interfa\u021ba web \u0219i cer\u00e2nd de mai multe ori acelea\u0219i date cu diferite parametrii. <\/p>\n Blocking bots via adrese IP.<\/a> and autonomous systems quickly stopped working, as bots switched to sending requests from millions of random IP addresses from home or mobile networks, obtained through botnet activity or monetization of browser extensions. Only 4-5 requests are sent from each address, making it futile to block them at the firewall level. <\/p>\n For a while, the Anubis system helped in blocking bots, but over time, bots adapted to perform the computations proposed by Anubis. Among other things, bots learned to solve the level 5 difficulty task, and it is problematic to increase the level further, as even the fifth level requires several seconds of computation and significantly irritates legitimate users. <\/p>\n \u00cen cele din urm\u0103, pentru a gestiona solicit\u0103rile scraper-ilor, infrastructura kernel.org trebuie s\u0103 cheltuie mai multe resurse dec\u00e2t pentru toate celelalte tipuri de opera\u021biuni legitime, inclusiv «git clone». La 5 servere<\/a>, serverele care deservesc git.kernel.org, \u00een orice moment, 14-16 din cele 90 de nuclee CPU sunt constant ocupate cu afi\u0219area commit-urilor git pentru bo\u021bi. Pentru a reduce povara, administratorii \u00eencearc\u0103 acum s\u0103 diminueze capacit\u0103\u021bile serviciului, s\u0103 dezactiveze unele opera\u021biuni consumatoare de resurse, s\u0103 limiteze accesul anonim \u0219i s\u0103 reduc\u0103 num\u0103rul de linkuri disponibile pentru navigare. \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 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\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\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% din cererile c\u0103tre git.kernel.org sunt generate de bo\u021bi, cre\u00e2nd o povar\u0103 parazitar\u0103 imens\u0103 | ProHoster","description":"Konstantin Riabtsev, administratorul infrastructurii kernel.org, a publicat rezultatele analizei traficului serviciului git.kernel.org, care permite vizualizarea con\u021binutului repositoarelor git ale proiectelor legate de dezvoltarea 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Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"