{"id":761,"date":"2013-03-22T16:40:42","date_gmt":"2013-03-22T14:40:42","guid":{"rendered":"http:\/\/blog.peychev.net\/?p=761"},"modified":"2013-03-22T16:54:39","modified_gmt":"2013-03-22T14:54:39","slug":"%d0%bf%d1%80%d0%b5%d0%b4%d0%bf%d0%b0%d0%b7%d0%b2%d0%b0%d0%bd%d0%b5-%d0%be%d1%82-dns-amplification-attack","status":"publish","type":"post","link":"https:\/\/blog.peychev.net\/?p=761","title":{"rendered":"\u041f\u0440\u0435\u0434\u043f\u0430\u0437\u0432\u0430\u043d\u0435 \u043e\u0442 DNS amplification attack"},"content":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0442\u0435 \u0434\u043d\u0438 \u0431\u044f\u0445 \u043f\u043e\u0434\u043b\u043e\u0436\u0435\u043d \u043d\u0430 DNS amplification attack. \u041a\u0430\u043a\u0432\u043e \u0437\u043d\u0430\u0447\u0438 \u0442\u043e\u0432\u0430? \u0418\u0437\u043f\u0440\u0430\u0449\u0430\u0442 \u0441\u0435 \u043c\u0430\u043b\u043a\u0438 \u0437\u0430\u044f\u0432\u043a\u0438 \u043a\u044a\u043c DNS \u0441\u044a\u0440\u0432\u044a\u0440\u0430, \u043e\u0442\u0433\u043e\u0432\u043e\u0440\u0430 \u043d\u0430 \u043a\u043e\u0438\u0442\u043e \u0435 \u0434\u043e\u0441\u0442\u0430 \u043f\u043e-\u0433\u043e\u043b\u044f\u043c \u043e\u0442 \u0442\u044f\u0445. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 &#8211; ANY, NS, TXT, MX. <!--more-->\u0426\u0435\u043b\u0442\u0430 \u043d\u0430 \u0430\u0442\u0430\u043a\u0430\u0442\u0430 \u0435 \u0441 \u043c\u0430\u043b\u044a\u043a \u043e\u0431\u0435\u043c \u0432\u0445\u043e\u0434\u044f\u0449 \u0442\u0440\u0430\u0444\u0438\u043a \u0434\u0430 \u043f\u0440\u0435\u0434\u0438\u0437\u0432\u0438\u043a\u0430\u0442 \u0433\u043e\u043b\u044f\u043c \u043e\u0431\u0435\u043c \u0438\u0437\u0445\u043e\u0434\u044f\u0449 \u0442\u0440\u0430\u0444\u0438\u043a \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0430\u043d \u043e\u0442 DNS \u0441\u044a\u0440\u0432\u044a\u0440\u0430. \u041f\u0440\u0438 \u043c\u0435\u043d \u0441 5mbps \u0432\u0445\u043e\u0434\u044f\u0449 \u0442\u0440\u0430\u0444\u0438\u043a \u0441\u0435 \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0430\u0445\u0430 \u043e\u043a\u043e\u043b\u043e 50mbps \u0438\u0437\u0445\u043e\u0434\u044f\u0449. \u041f\u044a\u0440\u0432\u043e\u043d\u0430\u0447\u0430\u043b\u043d\u043e \u0442\u0440\u044a\u0433\u043d\u0430\u0445 \u0434\u0430 \u0441\u0435 \u0431\u043e\u0440\u044f \u043f\u043e &#8220;\u0445\u0430\u043c\u0430\u043b\u0441\u043a\u0438\u044f&#8221; \u043d\u0430\u0447\u0438\u043d \u0441 \u0430\u0442\u0430\u043a\u0443\u0432\u0430\u0449\u0438\u0442\u0435 &#8211; \u0431\u043b\u0438\u0440\u0430\u0445 \u0435\u0434\u0438\u043d \u043f\u043e \u0435\u0434\u0438\u043d IP \u0430\u0434\u0440\u0435\u0441\u0438\u0442\u0435, \u043a\u043e\u0438\u0442\u043e \u0438\u0437\u043f\u0440\u0430\u0449\u0430\u0445\u0430 \u0433\u043e\u043b\u044f\u043c \u0431\u0440\u043e\u0439 \u0442\u0430\u043a\u0438\u0432\u0430 \u043c\u0430\u043b\u043a\u0438 \u0437\u0430\u044f\u0432\u043a\u0438, \u0447\u0438\u0438\u0442\u043e \u043e\u0442\u0433\u043e\u0432\u043e\u0440 \u0435 \u0432 \u043f\u044a\u0442\u0438 \u043f\u043e\u0433\u043e\u043b\u044f\u043c \u043e\u0442 \u0437\u0430\u044f\u0432\u043a\u0430\u0442\u0430. \u0422\u043e\u0432\u0430 \u0435\u0441\u0442\u0435\u0441\u0442\u0432\u0435\u043d\u043e \u043d\u0435 \u0434\u0430\u0434\u0435 \u0433\u043e\u043b\u044f\u043c \u0440\u0435\u0437\u0443\u043b\u0442\u0430\u0442, \u0442\u044a\u0439 \u043a\u0430\u0442\u043e \u0430\u0442\u0430\u043a\u0443\u0432\u0430\u0449\u0438\u0442\u0435 \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e \u0434\u043e\u0431\u0430\u0432\u044f\u0445\u0430 \u043d\u043e\u0432\u0438 \u0438 \u043d\u043e\u0432\u0438 \u0437\u0430\u0440\u0430\u0437\u0435\u043d\u0438 \u043c\u0430\u0448\u0438\u043d\u0438, \u043a\u043e\u0438\u0442\u043e \u0434\u0430 \u043f\u0440\u0430\u0432\u044f\u0442 \u0441\u044a\u0449\u043e\u0442\u043e &#8211; \u0438\u0437\u043f\u0440\u0430\u0449\u0430\u0442 \u043c\u0430\u043b\u043a\u0438 \u0437\u0430\u044f\u0432\u043a\u0438, \u043a\u043e\u0438\u0442\u043e \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0430\u0442 \u0433\u043e\u043b\u0435\u043c\u0438 \u043e\u0442\u0433\u043e\u0432\u043e\u0440\u0438.<\/p>\n<p>\u0421\u043b\u0435\u0434 \u043d\u044f\u043a\u043e\u043b\u043a\u043e \u0447\u0430\u0441\u0430 \u0447\u0435\u0442\u0435\u043d\u0435 \u043d\u0430 iptables \u043d\u0430\u043c\u0435\u0440\u0438\u0445 \u043d\u0430\u0447\u0438\u043d \u043d\u0430 \u043b\u0438\u043c\u0438\u0442\u0438\u0440\u0430\u043c \u0431\u0440\u043e\u044f \u0437\u0430\u044f\u0432\u043a\u0438 \u043e\u0442 \u0435\u0434\u0438\u043d\u0438\u0447\u0435\u043d IP \u0430\u0434\u0440\u0435\u0441. \u0415\u0442\u043e \u043a\u0430\u043a \u0438\u0437\u0433\u043b\u0435\u0436\u0434\u0430 \u0438 \u043c\u043e\u0435\u0442\u043e \u043f\u0440\u0430\u0432\u0438\u043b\u043e \u0437\u0430 20 \u0437\u0430\u044f\u0432\u043a\u0438 \u043d\u0430 \u0441\u0435\u043a\u0443\u043d\u0434\u0430:<\/p>\n<div style=\"border: 1px dashed;\"><code style=\"font-weight: bold;\">\/sbin\/iptables -I INPUT -p udp --dport 53 -m state \\<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;--state NEW -m recent --set<br \/>\n\/sbin\/iptables -I INPUT -p udp --dport 53 -m state \\<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; --state NEW -m recent --update --seconds 1 \\<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; --hitcount 20 -j DROP<\/code><\/div>\n<p>\u041a\u0430\u043a\u0432\u043e \u0441\u0435 \u0441\u043b\u0443\u0447\u0438 \u0441\u043b\u0435\u0434 \u0434\u043e\u0431\u0430\u0432\u044f\u043d\u0435\u0442\u043e \u043d\u0430 \u0432\u044a\u043f\u0440\u043e\u0441\u043d\u043e\u0442\u043e \u043f\u0440\u0430\u0432\u0438\u043b\u043e &#8211; \u0430\u0442\u0430\u043a\u0430\u0442\u0430 \u043f\u0440\u043e\u0434\u044a\u043b\u0436\u0438, \u043d\u043e \u0438\u0437\u0445\u043e\u0434\u044f\u0449\u0438\u044f \u0442\u0440\u0430\u0444\u0438\u043a \u043e\u0442 50mbps \u043f\u0430\u0434\u043d\u0430 \u0434\u0440\u0430\u0441\u0442\u0438\u0447\u043d\u043e 2-5mbps \u043d\u0430 \u0441\u044a\u0440\u0432\u044a\u0440. \u0420\u0435\u0437\u0443\u043b\u0442\u0430\u0442\u0430 \u0435 \u0441\u043f\u0435\u0441\u0442\u0435\u043d\u043e \u043e\u0433\u0440\u043e\u043c\u043d\u043e \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e fake \u0438\u0437\u0445\u043e\u0434\u044f\u0449 \u0442\u0440\u0430\u0444\u0438\u043a.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0442\u0435 \u0434\u043d\u0438 \u0431\u044f\u0445 \u043f\u043e\u0434\u043b\u043e\u0436\u0435\u043d \u043d\u0430 DNS amplification attack. \u041a\u0430\u043a\u0432\u043e \u0437\u043d\u0430\u0447\u0438 \u0442\u043e\u0432\u0430? \u0418\u0437\u043f\u0440\u0430\u0449\u0430\u0442 \u0441\u0435 \u043c\u0430\u043b\u043a\u0438 \u0437\u0430\u044f\u0432\u043a\u0438 \u043a\u044a\u043c DNS \u0441\u044a\u0440\u0432\u044a\u0440\u0430, \u043e\u0442\u0433\u043e\u0432\u043e\u0440\u0430 \u043d\u0430 \u043a\u043e\u0438\u0442\u043e \u0435 \u0434\u043e\u0441\u0442\u0430 \u043f\u043e-\u0433\u043e\u043b\u044f\u043c \u043e\u0442 \u0442\u044f\u0445. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 &#8211; ANY, NS, TXT, MX.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,7],"tags":[425,348,426],"class_list":["post-761","post","type-post","status-publish","format-standard","hentry","category-it","category-7","tag-attack","tag-dns","tag-iptables"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/blog.peychev.net\/index.php?rest_route=\/wp\/v2\/posts\/761","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.peychev.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.peychev.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.peychev.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.peychev.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=761"}],"version-history":[{"count":15,"href":"https:\/\/blog.peychev.net\/index.php?rest_route=\/wp\/v2\/posts\/761\/revisions"}],"predecessor-version":[{"id":779,"href":"https:\/\/blog.peychev.net\/index.php?rest_route=\/wp\/v2\/posts\/761\/revisions\/779"}],"wp:attachment":[{"href":"https:\/\/blog.peychev.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.peychev.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.peychev.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}