{"id":35190,"date":"2019-10-31T22:02:50","date_gmt":"2019-10-31T19:02:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/eksperiment-mozhno-li-snizit-negativnye-posledstviya-dos-atak-s-pomoshhyu-proksi\/"},"modified":"2019-10-31T22:02:50","modified_gmt":"2019-10-31T19:02:50","slug":"eksperiment-mozhno-li-snizit-negativnye-posledstviya-dos-atak-s-pomoshhyu-proksi","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/eksperiment-mozhno-li-snizit-negativnye-posledstviya-dos-atak-s-pomoshhyu-proksi","title":{"rendered":"Experiment: lze sn\u00ed\u017eit negativn\u00ed d\u016fsledky DoS \u00fatok\u016f pomoc\u00ed proxy","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><img decoding=\"async\" alt=\"Experiment: lze sn\u00ed\u017eit negativn\u00ed d\u016fsledky DoS \u00fatok\u016f pomoc\u00ed proxy\" src=\"\/wp-content\/uploads\/2019\/06\/c0030f84f4aa98a851465010af52f7bd.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/noindex><\/p>\n<p><i>Obr\u00e1zek: <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/FCrYdP8gohg\">Unsplash<\/a><\/noindex><\/i><\/p>\n<p>\u00datoky DoS jsou jednou z v\u00fdznamn\u00fdch hrozeb informa\u010dn\u00ed bezpe\u010dnosti v modern\u00edm internetu. Existuj\u00ed des\u00edtky botnet\u016f, kter\u00e9 zlo\u010dinci pronaj\u00edmaj\u00ed k prov\u00e1d\u011bn\u00ed podobn\u00fdch \u00fatok\u016f. <\/p>\n<p>V\u011bdci z univerzity v San Diegu provedli <noindex><a rel=\"nofollow\" href=\"https:\/\/cryptosec.ucsd.edu\/miscpapers\/mgrid-DoS.pdf\">studie<\/a><\/noindex> zkoum\u00e1n\u00ed toho, jak moc pomoc\u00ed proxy lze sn\u00ed\u017eit negativn\u00ed dopad DoS \u00fatok\u016f \u2013 p\u0159in\u00e1\u0161\u00edme v\u00e1m hlavn\u00ed body t\u00e9to pr\u00e1ce.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>\u00davod: proxy jako n\u00e1stroj v boji proti DoS<\/h2>\n<p>\nPodobn\u00e9 experimenty pravideln\u011b prov\u00e1d\u011bj\u00ed v\u00fdzkumn\u00edci z r\u016fzn\u00fdch zem\u00ed, ale jejich spole\u010dn\u00fd probl\u00e9m spo\u010d\u00edv\u00e1 v nedostatku zdroj\u016f pro modelov\u00e1n\u00ed \u00fatok\u016f bl\u00ed\u017e\u00edc\u00edch se realit\u011b. Testov\u00e1n\u00ed na mal\u00fdch testovac\u00edch stanic\u00edch neumo\u017e\u0148uje odpov\u011bd\u011bt na ot\u00e1zky o tom, jak \u00fasp\u011b\u0161n\u011b budou proxy odol\u00e1vat \u00fatoku ve slo\u017eit\u00fdch s\u00edt\u00edch, jak\u00e9 parametry hraj\u00ed kl\u00ed\u010dovou roli v schopnosti minimalizovat \u0161kody atd.<\/p>\n<p>Pro experiment v\u011bdci vytvo\u0159ili model typick\u00e9 webov\u00e9 aplikace \u2013 nap\u0159\u00edklad e-commerce slu\u017eby. Funguje pomoc\u00ed clusteru server\u016f, u\u017eivatel\u00e9 jsou rozprost\u0159eni po r\u016fzn\u00fdch geografick\u00fdch lokalit\u00e1ch a k slu\u017eb\u011b p\u0159istupuj\u00ed p\u0159es internet. V tomto modelu internet slou\u017e\u00ed jako prost\u0159edek komunikace mezi slu\u017ebou a u\u017eivateli \u2013 takto funguj\u00ed webov\u00e9 slu\u017eby od vyhled\u00e1va\u010d\u016f a\u017e po n\u00e1stroje online bankovnictv\u00ed.<\/p>\n<p><img decoding=\"async\" alt=\"Experiment: lze sn\u00ed\u017eit negativn\u00ed d\u016fsledky DoS \u00fatok\u016f pomoc\u00ed proxy\" src=\"\/wp-content\/uploads\/2019\/06\/9d265ec754b6cd0c8bb617a5d08cb8b0.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n\u00datoky DoS znemo\u017e\u0148uj\u00ed norm\u00e1ln\u00ed interakci mezi slu\u017ebou a u\u017eivateli. Existuj\u00ed dva typy DoS: \u00fatoky na \u00farovni aplikace a na \u00farovni infrastruktury. V posledn\u00edm p\u0159\u00edpad\u011b \u00fato\u010dn\u00edci napadaj\u00ed p\u0159\u00edmo s\u00ed\u0165 a hostitele, na nich\u017e b\u011b\u017e\u00ed slu\u017eba (nap\u0159\u00edklad zapln\u00ed flood traffic celou \u0161\u00ed\u0159ku p\u00e1sma s\u00edt\u011b). V p\u0159\u00edpad\u011b \u00fatoku na \u00farovni aplikace, c\u00edlem \u00fato\u010dn\u00edka je u\u017eivatelsk\u00e9 rozhran\u00ed \u2013 k tomu pos\u00edlaj\u00ed obrovsk\u00e9 mno\u017estv\u00ed po\u017eadavk\u016f s c\u00edlem dos\u00e1hnout p\u00e1du aplikace. Popisovan\u00fd experiment se t\u00fdkal \u00fatok\u016f na \u00farovni infrastruktury.<\/p>\n<p>Proxy s\u00edt\u011b jsou jedn\u00edm z n\u00e1stroj\u016f minimalizace \u0161kod zp\u016fsoben\u00fdch DoS \u00fatoky. P\u0159i pou\u017eit\u00ed proxy jsou v\u0161echny po\u017eadavky od u\u017eivatele k serveru a odpov\u011bdi na n\u011b p\u0159ed\u00e1v\u00e1ny nikoli p\u0159\u00edmo, ale prost\u0159ednictv\u00edm mezi\u010dl\u00e1nkov\u00fdch server\u016f. U\u017eivatel i aplikace se navz\u00e1jem \"nevid\u00ed\" p\u0159\u00edmo, maj\u00ed k dispozici pouze adresy proxy. V d\u016fsledku toho nen\u00ed mo\u017en\u00e9 \u00fato\u010dit na aplikaci p\u0159\u00edmo. Na hranici s\u00edt\u011b se nach\u00e1zej\u00ed tzv. edge proxy \u2013 extern\u00ed proxy s dostupn\u00fdmi IP adresami, p\u0159ipojen\u00ed prob\u00edh\u00e1 nejprve k nim. <\/p>\n<p><img decoding=\"async\" alt=\"Experiment: lze sn\u00ed\u017eit negativn\u00ed d\u016fsledky DoS \u00fatok\u016f pomoc\u00ed proxy\" src=\"\/wp-content\/uploads\/2019\/06\/ab0a628d4b2d2faa5617ff2d0a2fa6b7.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAby bylo mo\u017en\u00e9 \u00fa\u010dinn\u011b \u010delit DoS \u00fatoku, mus\u00ed proxy s\u00ed\u0165 m\u00edt dv\u011b kl\u00ed\u010dov\u00e9 schopnosti. Zaprv\u00e9, tato mezi\u010dl\u00e1nkov\u00e1 s\u00ed\u0165 mus\u00ed hr\u00e1t roli zprost\u0159edkovatele, co\u017e znamen\u00e1, \u017ee \"dostoupit\" k aplikaci lze pouze prost\u0159ednictv\u00edm n\u00ed. To vylou\u010d\u00ed mo\u017enost p\u0159\u00edm\u00e9ho \u00fatoku na slu\u017ebu. Zadruh\u00e9, proxy s\u00ed\u0165 mus\u00ed m\u00edt schopnost umo\u017enit u\u017eivatel\u016fm nad\u00e1le interagovat s aplikac\u00ed, dokonce i b\u011bhem \u00fatoku.<\/p>\n<h2>Infrastruktura experimentu<\/h2>\n<p>\nB\u011bhem v\u00fdzkumu byly pou\u017eity \u010dty\u0159i kl\u00ed\u010dov\u00e9 komponenty:<\/p>\n<ul>\n<li>implementace proxy s\u00edt\u011b;<\/li>\n<li>webov\u00fd server Apache;<\/li>\n<li>n\u00e1stroj pro webov\u00e9 testov\u00e1n\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/www.joedog.org\/siege-home\/\">Siege<\/a><\/noindex>;<\/li>\n<li>n\u00e1stroj pro prov\u00e1d\u011bn\u00ed \u00fatok\u016f <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Trinoo\">Trinoo<\/a><\/noindex>.<\/li>\n<\/ul>\n<p>\nSimulace byla provedena v prost\u0159ed\u00ed MicroGrid \u2013 m\u016f\u017ee b\u00fdt pou\u017eita pro simulace s\u00edt\u00ed se 20 000 sm\u011brova\u010di, co\u017e je srovnateln\u00e9 se s\u00edt\u011bmi Tier-1 oper\u00e1tor\u016f.<\/p>\n<p>Typick\u00e1 s\u00ed\u0165 Trinoo se skl\u00e1d\u00e1 z mno\u017einy kompromitovan\u00fdch hostitel\u016f, na kter\u00fdch je spu\u0161t\u011bn d\u00e9mon programu. D\u00e1le existuje kontroln\u00ed software pro spr\u00e1vu s\u00edt\u011b a sm\u011brov\u00e1n\u00ed DoS \u00fatok\u016f. Po obdr\u017een\u00ed seznamu IP adres d\u00e9mon Trinoo pos\u00edl\u00e1 UDP pakety na c\u00edle v ur\u010den\u00e9m \u010dase. <\/p>\n<p>B\u011bhem experimentu byly pou\u017eity dva klastery. Simul\u00e1tor MicroGrid proch\u00e1zel klastrem Xeon Linux skl\u00e1daj\u00edc\u00edm se z 16 uzl\u016f (servery 2.4GHz s 1 GB pam\u011bti na ka\u017ed\u00e9m stroji), propojen\u00fdch p\u0159es 1 Gbps Ethernet switch. Dal\u0161\u00ed programov\u00e9 komponenty byly um\u00edst\u011bny v klastru o 24 uzlech (450MHz PII Linux-cthdths s 1 GB pam\u011bti na ka\u017ed\u00e9m stroji), spojen\u00fdch 100Mbps Ethernet switchem. Oba klastery byly propojeny kan\u00e1lem o rychlosti 1Gbps.<\/p>\n<p>Proxy s\u00ed\u0165 je um\u00edst\u011bna v poolu o 1000 hostech. Edge proxy jsou rovnom\u011brn\u011b rozlo\u017eeny po cel\u00e9m poolu zdroj\u016f. Proxy pro pr\u00e1ci s aplikac\u00ed jsou um\u00edst\u011bny na hostech, kter\u00e9 se nach\u00e1zej\u00ed bl\u00ed\u017ee jej\u00ed infrastruktu\u0159e. Ostatn\u00ed proxy jsou rovnom\u011brn\u011b rozlo\u017eeny mezi hrani\u010dn\u00ed proxy a proxy pro aplikaci. <\/p>\n<p><img decoding=\"async\" alt=\"Experiment: lze sn\u00ed\u017eit negativn\u00ed d\u016fsledky DoS \u00fatok\u016f pomoc\u00ed proxy\" src=\"\/wp-content\/uploads\/2019\/06\/6fb20f98dbfe3ecbc70b5ae98f039cbd.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<i>S\u00ed\u0165 pro simulaci<\/i><\/p>\n<p>Pro studium efektivity proxy jako n\u00e1stroje proti DoS \u00fatok\u016fm v\u00fdzkumn\u00edci m\u011b\u0159ili produktivitu aplikace p\u0159i r\u016fzn\u00fdch sc\u00e9n\u00e1\u0159\u00edch vn\u011bj\u0161\u00edch vliv\u016f. Celkem v proxy s\u00edti bylo 192 proxy (64 z nich hrani\u010dn\u00ed). Pro proveden\u00ed \u00fatoku byla vytvo\u0159ena s\u00ed\u0165 Trinoo, kter\u00e1 zahrnovala 100 d\u00e9mon\u016f. Ka\u017ed\u00fd z d\u00e9mon\u016f m\u011bl kan\u00e1l o \u0161\u00ed\u0159ce 100 Mbps. To odpov\u00edd\u00e1 botnetu o velikosti 10 tis\u00edc dom\u00e1c\u00edch router\u016f.<\/p>\n<p>Byl m\u011b\u0159en vliv DoS \u00fatoku na aplikaci a proxy s\u00ed\u0165. V experiment\u00e1ln\u00ed konfiguraci m\u011bla aplikace internetov\u00fd kan\u00e1l o \u0161\u00ed\u0159ce 250 Mbps, zat\u00edmco ka\u017ed\u00fd hrani\u010dn\u00ed proxy m\u011bl 100 Mbps.<\/p>\n<h2>V\u00fdsledky experimentu<\/h2>\n<p>\nPodle anal\u00fdzy se uk\u00e1zalo, \u017ee \u00fatok o \u0161\u00ed\u0159ce 250 Mbps v\u00fdrazn\u011b zvy\u0161uje dobu odezvy aplikace (p\u0159ibli\u017en\u011b desetkr\u00e1t), co\u017e ji \u010din\u00ed nepou\u017eitelnou. Av\u0161ak p\u0159i pou\u017eit\u00ed proxy s\u00edt\u011b \u00fatok nem\u00e1 v\u00fdznamn\u00fd vliv na v\u00fdkon a nezhor\u0161uje u\u017eivatelsk\u00fd z\u00e1\u017eitek. To se d\u011bje proto, \u017ee hrani\u010dn\u00ed proxy rozm\u011bln\u00ed efekt \u00fatoku, a celkov\u00fd objem zdroj\u016f proxy s\u00edt\u011b je vy\u0161\u0161\u00ed ne\u017e samotn\u00e9 aplikace. <\/p>\n<p>Podle statistik, pokud v\u00fdkon \u00fatoku nep\u0159esahuje 6.0 Gbps (p\u0159i\u010dem\u017e celkov\u00e1 p\u0159enosov\u00e1 kapacita kan\u00e1l\u016f hrani\u010dn\u00edch proxy je pouze 6.4 Gbps), 95% u\u017eivatel\u016f nezaznamen\u00e1 \u017e\u00e1dn\u00e9 v\u00fdrazn\u00e9 sn\u00ed\u017een\u00ed v\u00fdkonu. V p\u0159\u00edpad\u011b velmi siln\u00e9ho \u00fatoku, p\u0159esahuj\u00edc\u00edho 6.4 Gbps, by v\u0161ak ani pou\u017eit\u00ed proxy s\u00edt\u011b nezabr\u00e1nilo degradaci \u00farovn\u011b slu\u017eeb pro koncov\u00e9 u\u017eivatele.<\/p>\n<p><img decoding=\"async\" alt=\"Experiment: lze sn\u00ed\u017eit negativn\u00ed d\u016fsledky DoS \u00fatok\u016f pomoc\u00ed proxy\" src=\"\/wp-content\/uploads\/2019\/06\/9b4e3c44ae9c1c93582f8366d82a9a99.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV p\u0159\u00edpad\u011b koncentrovan\u00fdch \u00fatok\u016f, kdy se jejich v\u00fdkon soust\u0159ed\u00ed na n\u00e1hodnou skupinu hrani\u010dn\u00edch proxy. V tomto p\u0159\u00edpad\u011b \u00fatok zaru\u010duje zablokov\u00e1n\u00ed \u010d\u00e1sti proxy s\u00edt\u011b, a proto zna\u010dn\u00e1 \u010d\u00e1st u\u017eivatel\u016f zaznamen\u00e1 pokles v\u00fdkonu. <\/p>\n<h2>Z\u00e1v\u011bry<\/h2>\n<p>\nV\u00fdsledky experimentu ukazuj\u00ed, \u017ee proxy s\u00edt\u011b mohou zlep\u0161it v\u00fdkonnost TCP aplikac\u00ed a zajistit obvyklou \u00farove\u0148 slu\u017eeb pro u\u017eivatele, i v p\u0159\u00edpad\u011b \u00fatok\u016f DoS. Podle z\u00edskan\u00fdch dat se proxy s\u00edt\u011b ukazuj\u00ed jako \u00fa\u010dinn\u00fd zp\u016fsob, jak minimalizovat d\u016fsledky \u00fatok\u016f. V\u00edce ne\u017e 90 % u\u017eivatel\u016f b\u011bhem experimentu nepoc\u00edtilo \u017e\u00e1dn\u00e9 sn\u00ed\u017een\u00ed kvality poskytovan\u00fdch slu\u017eeb. Krom\u011b toho v\u00fdzkumn\u00edci zjistili, \u017ee s rostouc\u00ed velikost\u00ed proxy s\u00edt\u011b se t\u00e9m\u011b\u0159 line\u00e1rn\u011b zvy\u0161uje i rozsah \u00fatok\u016f DoS, kter\u00e9 je schopna zvl\u00e1dnout. Proto \u010d\u00edm v\u011bt\u0161\u00ed je s\u00ed\u0165, t\u00edm efektivn\u011bji se postav\u00ed proti DoS \u00fatok\u016fm.<\/p>\n<h2>U\u017eite\u010dn\u00e9 odkazy a materi\u00e1ly od <noindex><a rel=\"nofollow\" href=\"https:\/\/infatica.io\">Infatica<\/a><\/noindex>:<\/h2>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/453168\/\">Studie: vytvo\u0159en\u00ed odoln\u00e9ho proti blokov\u00e1n\u00ed proxy serveru pomoc\u00ed teorie her<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/452438\/\">Historie boje proti cenzu\u0159e: jak funguje metoda flash proxy, kterou vytvo\u0159ili v\u011bdci z MIT a Stanfordu<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/451832\/\">Jak pochopit, kdy proxy l\u017eou: ov\u011b\u0159ov\u00e1n\u00ed fyzick\u00fdch lokalizac\u00ed s\u00ed\u0165ov\u00fdch proxy pomoc\u00ed algoritmu aktivn\u00ed geolokace<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/infatica\/blog\/452334\/\">Jak se maskovat na internetu: porovn\u00e1n\u00ed serverov\u00fdch a rezidentn\u00edch proxy<\/a><\/noindex><\/li>\n<\/ul>\n<p>Zdroj: habr.com<\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0435: Unsplash DoS-\u0430\u0442\u0430\u043a\u0438 \u2013 \u043e\u0434\u043d\u0430 \u0438\u0437 \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u043d\u044b\u0445 \u0443\u0433\u0440\u043e\u0437 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0432 \u0441\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u043c \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0435. \u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0442 \u0434\u0435\u0441\u044f\u0442\u043a\u0438 \u0431\u043e\u0442\u043d\u0435\u0442\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0438 \u0441\u0434\u0430\u044e\u0442 \u0432 \u0430\u0440\u0435\u043d\u0434\u0443 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0445 \u0430\u0442\u0430\u043a. \u0423\u0447\u0435\u043d\u044b\u0435 \u0438\u0437 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \u0421\u0430\u043d-\u0414\u0438\u0435\u0433\u043e \u043f\u0440\u043e\u0432\u0435\u043b\u0438 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u0442\u043e\u0433\u043e, \u043d\u0430\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u0440\u043e\u043a\u0441\u0438 \u043f\u043e\u043c\u043e\u0433\u0430\u0435\u0442 \u0441\u043d\u0438\u0437\u0438\u0442\u044c \u043d\u0435\u0433\u0430\u0442\u0438\u0432\u043d\u044b\u0439 \u044d\u0444\u0444\u0435\u043a\u0442 \u043e\u0442 DoS-\u0430\u0442\u0430\u043a \u2013 \u043c\u044b \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c \u0432\u0430\u0448\u0435\u043c\u0443 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u044e \u043e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0442\u0435\u0437\u0438\u0441\u044b \u044d\u0442\u043e\u0439 \u0440\u0430\u0431\u043e\u0442\u044b. \u0412\u0432\u0435\u0434\u0435\u043d\u0438\u0435: \u043f\u0440\u043e\u043a\u0441\u0438 \u043a\u0430\u043a \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442 \u0431\u043e\u0440\u044c\u0431\u044b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26445,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-35190","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/eksperiment-mozhno-li-snizit-negativnye-posledstviya-dos-atak-s-pomoshhyu-proksi\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u042d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442: \u043c\u043e\u0436\u043d\u043e \u043b\u0438 \u0441\u043d\u0438\u0437\u0438\u0442\u044c \u043d\u0435\u0433\u0430\u0442\u0438\u0432\u043d\u044b\u0435 \u043f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f DoS-\u0430\u0442\u0430\u043a \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043f\u0440\u043e\u043a\u0441\u0438 | ProHoster\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/eksperiment-mozhno-li-snizit-negativnye-posledstviya-dos-atak-s-pomoshhyu-proksi\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2019-10-31T19:02:50+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2019-10-31T19:02:50+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Experiment: lze sn\u00ed\u017eit negativn\u00ed dopady DoS \u00fatok\u016f pomoc\u00ed proxy | ProHoster","description":"","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/eksperiment-mozhno-li-snizit-negativnye-posledstviya-dos-atak-s-pomoshhyu-proksi","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u042d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442: \u043c\u043e\u0436\u043d\u043e \u043b\u0438 \u0441\u043d\u0438\u0437\u0438\u0442\u044c \u043d\u0435\u0433\u0430\u0442\u0438\u0432\u043d\u044b\u0435 \u043f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f DoS-\u0430\u0442\u0430\u043a \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043f\u0440\u043e\u043a\u0441\u0438 | ProHoster","og:url":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/eksperiment-mozhno-li-snizit-negativnye-posledstviya-dos-atak-s-pomoshhyu-proksi","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T19:02:50+00:00","article:modified_time":"2019-10-31T19:02:50+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"35190","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-21 22:17:19","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 02:09:01","updated":"2026-01-21 22:17:19","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/35190","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=35190"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/35190\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media\/26445"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=35190"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=35190"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=35190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}