Konstantin Ryabtsev, administrator of the infrastructure at kernel.org, published the results of an analysis of the traffic for the git.kernel.org service, which allows viewing the contents of git repositories related to the development of the Linux kernel. The service handles about 6 million request information about commits daily, of which 66% come from bots, which can be blocked using the Anubis system. 33% of requests undergo a check by the Anubis system, which only allows entry after a JavaScript value is correctly guessed, the SHA-256 hash of which, combined with the string provided by the server, contains a specific number of leading zeros (this task requires CPU resources to solve but does not require resources for verification). <\/p>\n
It's impossible to accurately 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 other 98% come from scrapers. One of the signs of bots is direct requests for old commits in random old branches, which are unlikely to be needed by people in their work. The activity of bots creates a huge parasitic load on server\u00ebt<\/a> pasi q\u00eb n\u00eb vend t\u00eb ngarkimit t\u00eb gjith\u00eb kodit dhe historis\u00eb s\u00eb komiteteve nj\u00eb her\u00eb p\u00ebrmes operacionit «git clone», robot\u00ebt d\u00ebrgojn\u00eb miliarda k\u00ebrkesa, duke shqyrtuar t\u00eb gjitha mund\u00ebsit\u00eb e qasjes p\u00ebrmes nd\u00ebrfaqes web dhe duke k\u00ebrkuar p\u00ebrs\u00ebri t\u00eb nj\u00ebjtat t\u00eb dh\u00ebna me parametra t\u00eb ndrysh\u00ebm. <\/p>\n Blocking bots by IP adresat<\/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. From each address, only 4-5 requests are sent, so blocking them at the firewall level is useless. <\/p>\n For a while, the Anubis system helped to block bots, but over time, the bots adapted to perform the computations suggested in Anubis. Among other things, bots learned to solve the 5th level difficulty task, and further increasing the level is problematic, as even the fifth level requires several seconds of computation and greatly irritates legitimate users. <\/p>\n Si rezultat, mb\u00ebshtetjes s\u00eb k\u00ebrkesave t\u00eb scrapper\u00ebve n\u00eb infrastruktura kernel.org ia kushtohet m\u00eb shum\u00eb burime se p\u00ebr gjith\u00eb llojet e tjera t\u00eb operacioneve legjitime, duke p\u00ebrfshir\u00eb «git clone». N\u00eb 5 sistemet<\/a>, sh\u00ebrbimi git.kernel.org ka nga 14-16 nga 90 b\u00ebrthamat e CPU gjithmon\u00eb t\u00eb angazhuar n\u00eb shfaqjen e git-komiteteve p\u00ebr bot\u00ebt. P\u00ebr t\u00eb ulur ngarkes\u00ebn, administratoret tani p\u00ebrpiqen t\u00eb kufizojn\u00eb mund\u00ebsit\u00eb e sh\u00ebrbimit, t\u00eb \u00e7aktivizojn\u00eb disa operacione q\u00eb konsumojn\u00eb shum\u00eb burime, t\u00eb kufizojn\u00eb aksesin anonim dhe t\u00eb reduktojn\u00eb numrin e lidhjeve t\u00eb disponueshme p\u00ebr navigimin. \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, 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Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"