{"id":37189,"date":"2019-10-31T22:16:15","date_gmt":"2019-10-31T19:16:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/setevoj-monitoring-i-vyyavleniya-anomalnoj-setevoj-aktivnosti-s-pomoshhyu-reshenij-flowmon-networks\/"},"modified":"2019-10-31T22:16:15","modified_gmt":"2019-10-31T19:16:15","slug":"setevoj-monitoring-i-vyyavleniya-anomalnoj-setevoj-aktivnosti-s-pomoshhyu-reshenij-flowmon-networks","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/setevoj-monitoring-i-vyyavleniya-anomalnoj-setevoj-aktivnosti-s-pomoshhyu-reshenij-flowmon-networks","title":{"rendered":"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/8509341060b74259e9383af1b28c1e59.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV posledn\u00ed dob\u011b lze na internetu nal\u00e9zt obrovsk\u00e9 mno\u017estv\u00ed materi\u00e1l\u016f na t\u00e9ma <b>anal\u00fdzy provozu na okraji s\u00edt\u011b<\/b>. P\u0159itom si v\u0161ichni jaksi \u00fapln\u011b zapomn\u011bli na <b>anal\u00fdzu lok\u00e1ln\u00edho provozu<\/b>, kter\u00e1 je nem\u00e9n\u011b d\u016fle\u017eit\u00e1. Tento \u010dl\u00e1nek se pr\u00e1v\u011b t\u00e9to problematice v\u011bnuje. Na p\u0159\u00edkladu <noindex><a rel=\"nofollow\" href=\"https:\/\/tssolution.ru\/katalog\/flowmon\">Flowmon Networks<\/a><\/noindex> si vzpomeneme na star\u00fd dobr\u00fd Netflow (a jeho alternativy), prozkoum\u00e1me zaj\u00edmav\u00e9 p\u0159\u00edpady, mo\u017en\u00e9 anom\u00e1lie v s\u00edti a zjist\u00edme v\u00fdhody \u0159e\u0161en\u00ed, kdy\u017e <b>cel\u00e1 s\u00ed\u0165 funguje jako jeden senzor<\/b>. A co je nejd\u016fle\u017eit\u011bj\u0161\u00ed \u2014 prov\u00e9st takovou anal\u00fdzu lok\u00e1ln\u00edho provozu lze zcela zdarma, v r\u00e1mci zku\u0161ebn\u00ed licence (<b>45 dn\u00ed<\/b>). Pokud v\u00e1s t\u00e9ma zaj\u00edm\u00e1, v\u00edtejte pod \u010dl\u00e1nkem. Pokud se v\u00e1m \u010d\u00edst nechce, m\u016f\u017eete se dop\u0159edu zaregistrovat na <noindex><a rel=\"nofollow\" href=\"https:\/\/tssolution.ru\/events\/vebinari_flowmon\">p\u0159ipravovan\u00fd webin\u00e1\u0159<\/a><\/noindex>, kde v\u0161e uk\u00e1\u017eeme a \u0159ekneme (tam se tak\u00e9 dozv\u00edte o nadch\u00e1zej\u00edc\u00edm \u0161kolen\u00ed produktu).<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Co je Flowmon Networks?<\/h3>\n<p>\nP\u0159edev\u0161\u00edm, Flowmon je evropsk\u00fd IT dodavatel. Spole\u010dnost je \u010desk\u00e1, se s\u00eddlem ve m\u011bst\u011b Brno (t\u00e9ma sankc\u00ed zde ani nem\u00e1 smysl otev\u00edrat). V aktu\u00e1ln\u00ed podob\u011b je firma na trhu zastoupena od roku 2007. P\u0159edt\u00edm byla zn\u00e1m\u00e1 pod zna\u010dkou Invea-Tech. Celkov\u011b tedy bylo na v\u00fdvoj produkt\u016f a \u0159e\u0161en\u00ed vynalo\u017eeno t\u00e9m\u011b\u0159 20 let.<\/p>\n<p>Flowmon se prezentuje jako zna\u010dka t\u0159\u00eddy A. Vyv\u00edj\u00ed pr\u00e9miov\u00e1 \u0159e\u0161en\u00ed pro korpor\u00e1tn\u00ed z\u00e1kazn\u00edky a je uvedena v kvadrantech Gartner v oblasti monitorov\u00e1n\u00ed a diagnostiky v\u00fdkonu s\u00edt\u011b (NPMD). Co\u017e je zaj\u00edmav\u00e9, ze v\u0161ech firem v t\u00e9to zpr\u00e1v\u011b je Flowmon jedin\u00fdm dodavatelem, kter\u00fd je Gartnerem ozna\u010den jako v\u00fdrobce \u0159e\u0161en\u00ed nejen pro monitorov\u00e1n\u00ed s\u00edt\u011b, ale i pro ochranu informac\u00ed (Network Behavior Analysis). Prvn\u00edho m\u00edsta zat\u00edm nedosahuje, ale d\u00edky tomu nep\u0159ich\u00e1z\u00ed s cenou jako k\u0159\u00eddlo od Boeingu.<\/p>\n<h3>Jak\u00e9 \u00fakoly umo\u017e\u0148uje produkt \u0159e\u0161it?<\/h3>\n<p>\nGlob\u00e1ln\u011b lze vy\u010dlenit n\u00e1sleduj\u00edc\u00ed okruh \u00fakol\u016f, kter\u00e9 produkty spole\u010dnosti \u0159e\u0161\u00ed:<\/p>\n<ol>\n<li>zvy\u0161ov\u00e1n\u00ed stability pr\u00e1ce s\u00edt\u011b a s\u00ed\u0165ov\u00fdch zdroj\u016f minimalizac\u00ed doby jejich v\u00fdpadk\u016f a nedostupnosti;<\/li>\n<li>zvy\u0161ov\u00e1n\u00ed celkov\u00e9 \u00farovn\u011b v\u00fdkonu s\u00edt\u011b;<\/li>\n<li>zvy\u0161ov\u00e1n\u00ed efektivity pr\u00e1ce administrativn\u00edho person\u00e1lu prost\u0159ednictv\u00edm:\n<ul>\n<li>vyu\u017e\u00edv\u00e1n\u00ed modern\u00edch n\u00e1stroj\u016f inovativn\u00edho monitorov\u00e1n\u00ed s\u00edt\u011b, zalo\u017een\u00fdch na informac\u00edch o IP toc\u00edch;<\/li>\n<li> poskytov\u00e1n\u00ed podrobn\u00fdch anal\u00fdz o funk\u010dnosti a stavu s\u00edt\u011b \u2013 u\u017eivatel\u00edch a aplikac\u00edch pracuj\u00edc\u00edch v s\u00edti, p\u0159en\u00e1\u0161en\u00fdch datech, interaguj\u00edc\u00edch zdroj\u00edch, slu\u017eb\u00e1ch a uzlech;<\/li>\n<li> reakce na incidenty je\u0161t\u011b p\u0159ed jejich vznikem, nikoli a\u017e po ztr\u00e1t\u011b slu\u017eby u\u017eivateli a klienty;<\/li>\n<li> zkr\u00e1cen\u00ed \u010dasu a zdroj\u016f pot\u0159ebn\u00fdch pro spr\u00e1vu s\u00edt\u011b a IT infrastruktury;<\/li>\n<li> zjednodu\u0161en\u00ed \u00fakol\u016f p\u0159i hled\u00e1n\u00ed poruch.<\/li>\n<\/ul>\n<\/li>\n<li>zv\u00fd\u0161en\u00ed \u00farovn\u011b zabezpe\u010den\u00ed s\u00edt\u011b a informa\u010dn\u00edch prost\u0159edk\u016f podniku d\u00edky vyu\u017eit\u00ed nesiganturn\u00edch technologi\u00ed pro odhalov\u00e1n\u00ed anom\u00e1ln\u00ed a \u0161kodliv\u00e9 s\u00ed\u0165ov\u00e9 aktivity, jako\u017e i \u201e\u00fatok\u016f nulov\u00e9ho dne\u201c (zero-day);<\/li>\n<li>zaji\u0161t\u011bn\u00ed po\u017eadovan\u00e9 \u00farovn\u011b SLA pro s\u00ed\u0165ov\u00e9 aplikace a datab\u00e1ze.<\/li>\n<\/ol>\n<p><\/p>\n<h3>Produktov\u00e9 portfolio Flowmon Networks<\/h3>\n<p>\nNyn\u00ed se pod\u00edvejme p\u0159\u00edmo na portfolio produkt\u016f Flowmon Networks a zjist\u00edme, \u010d\u00edm se konkr\u00e9tn\u011b tato spole\u010dnost zab\u00fdv\u00e1. Jak u\u017e mnoz\u00ed z n\u00e1zvu tu\u0161\u00ed, hlavn\u00ed specializac\u00ed jsou \u0159e\u0161en\u00ed pro monitoring toku dat (flow monitoring), plus \u0159ada dal\u0161\u00edch modul\u016f, kter\u00e9 roz\u0161i\u0159uj\u00ed z\u00e1kladn\u00ed funk\u010dnost.<\/p>\n<p>Ve skute\u010dnosti lze Flowmon nazvat spole\u010dnost\u00ed zam\u011b\u0159enou na jeden produkt, nebo sp\u00ed\u0161e \u2013 jedno \u0159e\u0161en\u00ed. Poj\u010fme se na to pod\u00edvat bl\u00ed\u017ee, zda je to dobr\u00e9 nebo \u0161patn\u00e9.<\/p>\n<p>J\u00e1drem syst\u00e9mu je sb\u011bra\u010d (collector), odpov\u011bdn\u00fd za shroma\u017e\u010fov\u00e1n\u00ed dat podle r\u016fzn\u00fdch protokol\u016f flow, jako jsou <b>NetFlow v5\/v9, jFlow, sFlow, NetStream, IPFIX<\/b>\u2026 Je z\u0159ejm\u00e9, \u017ee pro spole\u010dnost, kter\u00e1 nen\u00ed napojena na \u017e\u00e1dn\u00e9ho v\u00fdrobce s\u00ed\u0165ov\u00e9ho za\u0159\u00edzen\u00ed, je d\u016fle\u017eit\u00e9 nab\u00eddnout trhu univerz\u00e1ln\u00ed produkt, kter\u00fd nen\u00ed v\u00e1z\u00e1n na \u017e\u00e1dn\u00fd konkr\u00e9tn\u00ed standard nebo protokol.<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/d8dddeaa90c8bc03b78282b7ca00ea86.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Flowmon Collector<\/i><\/p>\n<p>Sb\u011bra\u010d je dod\u00e1v\u00e1n jak ve form\u011b hardwarov\u00e9ho serveru, tak jako virtu\u00e1ln\u00ed stroj (VMware, Hyper-V, KVM). Mimochodem, hardwarov\u00e1 platforma je realizov\u00e1na na p\u0159izp\u016fsoben\u00fdch serverech DELL, co\u017e automaticky odstra\u0148uje v\u011bt\u0161inu ot\u00e1zek ohledn\u011b z\u00e1ruky a RMA. Vlastn\u00ed hardwarovou sou\u010d\u00e1st\u00ed jsou snad jen FPGA desky pro zachycov\u00e1n\u00ed dat, vyvinut\u00e9 dce\u0159inou spole\u010dnost\u00ed Flowmon, kter\u00e9 umo\u017e\u0148uj\u00ed monitorov\u00e1n\u00ed p\u0159i rychlostech a\u017e 100 Gbps.<\/p>\n<p>Ale co d\u011blat, pokud existuj\u00edc\u00ed s\u00ed\u0165ov\u00e9 za\u0159\u00edzen\u00ed nem\u016f\u017ee generovat kvalitn\u00ed flow? Nebo je z\u00e1t\u011b\u017e na za\u0159\u00edzen\u00ed p\u0159\u00edli\u0161 vysok\u00e1? \u017d\u00e1dn\u00fd probl\u00e9m:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/53dda0e4f42ddbf7a8add1064e0ab913.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Flowmon Prob<\/i><\/p>\n<p>V tomto p\u0159\u00edpad\u011b Flowmon Networks doporu\u010duje pou\u017e\u00edvat vlastn\u00ed sondy (Flowmon Probe), kter\u00e9 se p\u0159ipojuj\u00ed do s\u00edt\u011b p\u0159es SPAN port p\u0159ep\u00edna\u010de nebo pomoc\u00ed pasivn\u00edch TAP rozbo\u010dova\u010d\u016f.<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/298507c4bcb3d562f9621ff59ee6018f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Mo\u017enosti nasazen\u00ed SPAN (zrcadlov\u00fd port) a TAP<\/i><\/p>\n<p>V tomto p\u0159\u00edpad\u011b je \"surov\u00fd\" provoz p\u0159ich\u00e1zej\u00edc\u00ed na Flowmon Probe p\u0159ev\u00e1d\u011bn na roz\u0161\u00ed\u0159en\u00fd IPFIX, kter\u00fd obsahuje v\u00edce ne\u017e <b>240 metrik s informacemi<\/b>. Zat\u00edmco ve standardn\u00edm protokolu NetFlow, generovan\u00e9m s\u00ed\u0165ov\u00fdm za\u0159\u00edzen\u00edm, nen\u00ed v\u00edce ne\u017e 80 metrik. To umo\u017e\u0148uje zaji\u0161t\u011bn\u00ed viditelnosti protokol\u016f nejen na \u00farovn\u00edch 3 a 4, ale tak\u00e9 na 7. \u00farovni podle modelu ISO OSI. V\u00fdsledkem je, \u017ee s\u00ed\u0165ov\u00ed administr\u00e1to\u0159i mohou monitorovat fungov\u00e1n\u00ed takov\u00fdch aplikac\u00ed a protokol\u016f, jako jsou e-mail, HTTP, DNS, SMB\u2026<\/p>\n<p>Konceptu\u00e1ln\u011b, logick\u00e1 architektura syst\u00e9mu vypad\u00e1 n\u00e1sledovn\u011b:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/273517a6aa47726fe51c498114908c14.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nCentr\u00e1ln\u00ed \u010d\u00e1st\u00ed cel\u00e9 \"ekosyst\u00e9mu\" Flowmon Networks je Collector, kter\u00fd p\u0159ij\u00edm\u00e1 provoz z existuj\u00edc\u00edho s\u00ed\u0165ov\u00e9ho za\u0159\u00edzen\u00ed nebo vlastn\u00edch sond (Probe). Ale pro \u0159e\u0161en\u00ed pro podniky by bylo p\u0159\u00edli\u0161 jednoduch\u00e9 poskytovat funkce v\u00fdhradn\u011b pro monitorov\u00e1n\u00ed s\u00ed\u0165ov\u00e9ho provozu. To dok\u00e1\u017e\u00ed i Open Source \u0159e\u0161en\u00ed, i kdy\u017e ne s takov\u00fdm v\u00fdkonem. Hodnotou Flowmon jsou dal\u0161\u00ed moduly, kter\u00e9 roz\u0161i\u0159uj\u00ed z\u00e1kladn\u00ed funkce:<\/p>\n<ul>\n<li>modul <b>Anomaly Detection Security<\/b> \u2013 detekce anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity, v\u010detn\u011b \u00fatok\u016f \u201ezero-day\u201c, na z\u00e1klad\u011b heuristick\u00e9 anal\u00fdzy provozu a typov\u00e9ho s\u00ed\u0165ov\u00e9ho profilu;<\/li>\n<li>modul <b>Monitoring v\u00fdkonnosti aplikac\u00ed<\/b> \u2013 kontrola v\u00fdkonu s\u00ed\u0165ov\u00fdch aplikac\u00ed bez instalace \u201eagent\u016f\u201c a vlivu na c\u00edlov\u00e9 syst\u00e9my;<\/li>\n<li>modul <b>Traffic Recorder<\/b> \u2013 z\u00e1znam fragment\u016f s\u00ed\u0165ov\u00e9ho provozu podle stanoven\u00e9 sady pravidel nebo podle spou\u0161t\u011b\u010de z modulu ADS, pro dal\u0161\u00ed troubleshooting a\/nebo vy\u0161et\u0159ov\u00e1n\u00ed incident\u016f IT bezpe\u010dnosti;<\/li>\n<li>modul <b>DDoS ochrana<\/b> \u2013 ochrana okraje s\u00edt\u011b p\u0159ed volumetrick\u00fdmi \u00fatoky typu denial-of-service DoS\/DDoS, v\u010detn\u011b \u00fatok\u016f na aplikace (OSI L3\/L4\/L7).<\/li>\n<\/ul>\n<p>\nV r\u00e1mci tohoto \u010dl\u00e1nku si uk\u00e1\u017eeme, jak to v\u0161echno funguje na\u017eivo na p\u0159\u00edkladu 2 modul\u016f \u2013 <b>Monitoring a diagnostika v\u00fdkonu s\u00edt\u011b<\/b> a <b>Anomaly Detection Security<\/b>.<br \/>\nV\u00fdchoz\u00ed \u00fadaje:<\/p>\n<ul>\n<li>server Lenovo RS 140 s hypervizorem VMware 6.0;<\/li>\n<li>obraz virtu\u00e1ln\u00edho stroje Flowmon Collector, kter\u00fd lze <noindex><a rel=\"nofollow\" href=\"https:\/\/www.flowmon.com\/en\/download-free-trial\">st\u00e1hnout zde<\/a><\/noindex>;<\/li>\n<li>p\u00e1r p\u0159ep\u00edna\u010d\u016f s podporou flow protokol\u016f.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Krok 1. Instalace Flowmon Collector<\/h3>\n<p>\nNasazen\u00ed virtu\u00e1ln\u00edho stroje na VMware prob\u00edh\u00e1 zcela standartn\u011b z OVF \u0161ablony. V\u00fdsledkem je virtu\u00e1ln\u00ed stroj spravovan\u00fd CentOSem s p\u0159ipraven\u00fdm softwarem. Po\u017eadavky na zdroje jsou rozumn\u00e9:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/9ae1559b01c639763e0053ee1de120ca.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nZb\u00fdv\u00e1 pouze prov\u00e9st z\u00e1kladn\u00ed inicializaci pomoc\u00ed p\u0159\u00edkazu <b>sysconfig<\/b>:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/c65a47dfd025595f7256b1e30b941e42.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNastavujeme IP na spr\u00e1vn\u00edm portu, DNS, \u010das, hostname a m\u016f\u017eeme se p\u0159ipojit k webov\u00e9mu rozhran\u00ed.<\/p>\n<h3>Krok 2. Instalace licence<\/h3>\n<p>\nZku\u0161ebn\u00ed licence na m\u011bs\u00edc a p\u016fl se generuje a stahuje spolu s obrazem virtu\u00e1ln\u00edho stroje. Nahr\u00e1v\u00e1 se p\u0159es <b>Configuration Center -&gt; License<\/b>. Nakonec vid\u00edme:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/a5c1c99ad14cf4ca5dfb560d55fa369d.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV\u0161e je p\u0159ipraveno. M\u016f\u017eeme za\u010d\u00edt pracovat.<\/p>\n<h3>Krok 3. Nastaven\u00ed p\u0159ij\u00edma\u010de na sb\u011brn\u00e9m za\u0159\u00edzen\u00ed<\/h3>\n<p>\nV t\u00e9to f\u00e1zi je t\u0159eba ur\u010dit, jak\u00fdm zp\u016fsobem budou data z provozn\u00edch zdroj\u016f p\u0159ich\u00e1zet do syst\u00e9mu. Jak jsme ji\u017e zm\u00ednili d\u0159\u00edve, to m\u016f\u017ee b\u00fdt jeden z protokol\u016f flow nebo SPAN port na switchi.<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/3ff1c77a58c152314a1615dd98ca92ca.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV na\u0161em p\u0159\u00edkladu budeme pou\u017e\u00edvat p\u0159\u00edjem dat pomoc\u00ed protokol\u016f <b>NetFlow v9 a IPFIX<\/b>. V tomto p\u0159\u00edpad\u011b jako c\u00edl uvedeme IP adresu spr\u00e1vcovsk\u00e9ho rozhran\u00ed \u2013 <b>192.168.78.198<\/b>. Rozhran\u00ed eth2 a eth3 (s typem Monitoring interface) se pou\u017e\u00edvaj\u00ed pro p\u0159\u00edjem kopie \"syrov\u00e9ho\" provozu ze SPAN portu switche. Tyto rozhran\u00ed vynech\u00e1me, nejsou pro n\u00e1s relevantn\u00ed.<br \/>\nD\u00e1le zkontrolujeme port sb\u011bra\u010de, na kter\u00fd by m\u011bl provoz p\u0159ich\u00e1zet.<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/31fff2f3bfef52b001edb39bdb3293f9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV na\u0161em p\u0159\u00edpad\u011b sb\u011bra\u010d o\u010dek\u00e1v\u00e1 provoz na portu UDP\/2055.<\/p>\n<h3>Krok 4. Nastaven\u00ed s\u00ed\u0165ov\u00e9ho vybaven\u00ed pro export flow<\/h3>\n<p>\nNastaven\u00ed NetFlow na za\u0159\u00edzen\u00ed Cisco Systems lze pravd\u011bpodobn\u011b ozna\u010dit za zcela b\u011b\u017enou z\u00e1le\u017eitost pro ka\u017ed\u00e9ho s\u00ed\u0165ov\u00e9ho administr\u00e1tora. Pro n\u00e1\u0161 p\u0159\u00edklad vezmeme n\u011bco nezvykl\u00e9ho. Nap\u0159\u00edklad router MikroTik RB2011UiAS-2HnD. Ano, jak podivn\u00e9, takov\u00e9 cenov\u011b v\u00fdhodn\u00e9 \u0159e\u0161en\u00ed pro mal\u00e9 a dom\u00e1c\u00ed kancel\u00e1\u0159e tak\u00e9 podporuje protokoly NetFlow v5\/v9 a IPFIX. V nastaven\u00ed ur\u010d\u00edme c\u00edl (adresu sb\u011bra\u010de 192.168.78.198 a port 2055):<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/3604b4c1c0b013a3822e99d97ab9e9cb.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA p\u0159id\u00e1me v\u0161echny dostupn\u00e9 metriky pro export:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/f22fa921b4195b184e82c12a2b852f3c.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNa tomto m\u00edst\u011b lze \u0159\u00edci, \u017ee z\u00e1kladn\u00ed nastaven\u00ed je dokon\u010deno. Zkontrolujeme, zda do syst\u00e9mu p\u0159ich\u00e1z\u00ed provoz.<\/p>\n<h3>Krok 5. Kontrola a provoz modulu Network Performance Monitoring and Diagnostics<\/h3>\n<p>\nP\u0159\u00edtomnost provozu ze zdroje lze zkontrolovat v sekci <b>Flowmon Monitoring Center -&gt; Sources<\/b>:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/b167ac4ba70c07d9d0fb521a1cf1a7ea.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nVid\u00edme, \u017ee data p\u0159ich\u00e1zej\u00ed do syst\u00e9mu. Po ur\u010dit\u00e9 dob\u011b, kdy sb\u011bra\u010d shrom\u00e1\u017ed\u00ed provoz, se widgety za\u010dnou zobrazovat informace:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/8cee4912c371366ff30ff7597f87cabc.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nByla vybudov\u00e1na syst\u00e9m na principu drill down. To znamen\u00e1, \u017ee u\u017eivatel, kdy\u017e si vybere zaj\u00edmav\u00fd fragment na sch\u00e9matu nebo grafu, \"prohlubuje\" se na \u00farove\u0148 dat, kter\u00e1 pot\u0159ebuje:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/1caa3b3c59dcd77210f690606a16740f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA\u017e k informac\u00edm o ka\u017ed\u00e9m s\u00ed\u0165ov\u00e9m p\u0159ipojen\u00ed a spojen\u00ed:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/ef8c8f4d2df0ae65b94fcc3be058099b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>Krok 6. Modul Anomaly Detection Security<\/h3>\n<p>\nTento modul bychom mohli nazvat jedn\u00edm z nejzaj\u00edmav\u011bj\u0161\u00edch, d\u00edky vyu\u017eit\u00ed bezsignaturn\u00edch metod pro detekci anom\u00e1li\u00ed v s\u00ed\u0165ov\u00e9m provozu a \u0161kodliv\u00e9 s\u00ed\u0165ov\u00e9 aktivity. Ale to nen\u00ed analog IDS\/IPS syst\u00e9m\u016f. Pr\u00e1ce s modulem za\u010d\u00edn\u00e1 jeho \"vzd\u011bl\u00e1v\u00e1n\u00edm\". K tomu se ve speci\u00e1ln\u00edm wizardu uv\u00e1d\u011bj\u00ed v\u0161echny kl\u00ed\u010dov\u00e9 komponenty a slu\u017eby s\u00edt\u011b, v\u010detn\u011b:<\/p>\n<ul>\n<li>adresy br\u00e1ny, DNS, DHCP a NTP server\u016f,<\/li>\n<li>adresace v segmentech u\u017eivatel\u016f a server\u016f.<\/li>\n<\/ul>\n<p>\nPot\u00e9 syst\u00e9m p\u0159ech\u00e1z\u00ed do re\u017eimu u\u010den\u00ed, kter\u00fd trv\u00e1 v pr\u016fm\u011bru od 2 t\u00fddn\u016f do 1 m\u011bs\u00edce. B\u011bhem t\u00e9to doby syst\u00e9m vytv\u00e1\u0159\u00ed baseline provozu, kter\u00fd je typick\u00fd p\u0159\u00edmo pro na\u0161i s\u00ed\u0165. Jin\u00fdmi slovy, syst\u00e9m se u\u010d\u00ed:<\/p>\n<ul>\n<li>jak\u00e9 chov\u00e1n\u00ed je charakteristick\u00e9 pro uzly s\u00edt\u011b?<\/li>\n<li>jak\u00e9 objemy dat se obvykle p\u0159en\u00e1\u0161ej\u00ed a jsou norm\u00e1ln\u00ed pro s\u00ed\u0165?<\/li>\n<li>jak\u00fd pracovn\u00ed \u010das je typick\u00fd pro u\u017eivatele?<\/li>\n<li>jak\u00e9 aplikace b\u011b\u017e\u00ed v s\u00edti?<\/li>\n<li>a mnohem v\u00edce.<\/li>\n<\/ul>\n<p>\nNakonec z\u00edsk\u00e1me n\u00e1stroj, kter\u00fd odhaluje jak\u00e9koli anom\u00e1lie v na\u0161\u00ed s\u00edti a odchylky od typick\u00e9ho chov\u00e1n\u00ed. Zde je n\u011bkolik p\u0159\u00edklad\u016f, kter\u00e9 syst\u00e9m umo\u017e\u0148uje odhalit:<\/p>\n<ul>\n<li>\u0161\u00ed\u0159en\u00ed nov\u00e9ho malware v s\u00edti, kter\u00fd nen\u00ed detekov\u00e1n signaturami antivirus\u016f;<\/li>\n<li>vybudov\u00e1n\u00ed DNS, ICMP nebo jin\u00fdch tunel\u016f a p\u0159enos dat obchvatem firewallu;<\/li>\n<li>objeven\u00ed nov\u00e9ho po\u010d\u00edta\u010de v s\u00edti, kter\u00fd se vyd\u00e1v\u00e1 za DHCP a\/nebo DNS server.<\/li>\n<\/ul>\n<p>\nPod\u00edvejme se, jak to vypad\u00e1 v praxi. Pot\u00e9, co v\u00e1\u0161 syst\u00e9m absolvoval v\u00fdcvik a vytvo\u0159il baseline s\u00ed\u0165ov\u00e9ho provozu, za\u010d\u00edn\u00e1 detekovat incidenty:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/e4d7d168716fc9f703dd9f14faf5816f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nHlavn\u00ed str\u00e1nka modulu - \u010dasov\u00fd graf s vyobrazen\u00edm odhalen\u00fdch incident\u016f. V na\u0161em p\u0159\u00edkladu vid\u00edme jasn\u00fd n\u00e1r\u016fst, p\u0159ibli\u017en\u011b mezi 9 a 16 hodinou. Ozna\u010d\u00edme ho a pod\u00edv\u00e1me se bl\u00ed\u017ee. <\/p>\n<p>Jasn\u011b se projevuje anom\u00e1ln\u00ed chov\u00e1n\u00ed \u00fato\u010dn\u00edka v s\u00edti. V\u0161echno za\u010d\u00edn\u00e1 t\u00edm, \u017ee host s adresou 192.168.3.225 za\u010dal horizont\u00e1ln\u00ed skenov\u00e1n\u00ed s\u00edt\u011b na portu 3389 (slu\u017eba Microsoft RDP) a nach\u00e1z\u00ed 14 potenci\u00e1ln\u00edch \"ob\u011bt\u00ed\":<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/5844fab428bd7adedbc694bf7dc7f19e.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\na<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/566cb37c28eb803d404e06a8d61372c3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00e1sleduj\u00edc\u00ed registrovan\u00fd incident \u2013 hostitel 192.168.3.225 zah\u00e1jil bruteforce \u00fatok na prolomen\u00ed hesel na slu\u017eb\u011b RDP (port 3389) na d\u0159\u00edve identifikovan\u00fdch adres\u00e1ch:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/18c97646b3982c5a9db86901cae9f5a7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV d\u016fsledku \u00fatoku na jednom z hacknut\u00fdch hostitel\u016f byla zaznamen\u00e1na SMTP anom\u00e1lie. Jin\u00fdmi slovy, za\u010dalo rozes\u00edl\u00e1n\u00ed SPAMu:<\/p>\n<p><img decoding=\"async\" alt=\"S\u00ed\u0165ov\u00fd monitoring a odhalov\u00e1n\u00ed anom\u00e1ln\u00ed s\u00ed\u0165ov\u00e9 aktivity pomoc\u00ed \u0159e\u0161en\u00ed Flowmon Networks\" src=\"\/wp-content\/uploads\/2019\/08\/fd1fce3c9bb23903a3c54d270924c5fe.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTento p\u0159\u00edklad je n\u00e1zornou uk\u00e1zkou schopnost\u00ed syst\u00e9mu a modulu Anomaly Detection Security, zejm\u00e9na. O efektivit\u011b si ud\u011blejte vlastn\u00ed z\u00e1v\u011br. T\u00edmto ukon\u010dujeme funk\u010dn\u00ed p\u0159ehled \u0159e\u0161en\u00ed.<\/p>\n<h3>Z\u00e1v\u011br<\/h3>\n<p>\nShrneme, jak\u00e9 z\u00e1v\u011bry o Flowmon m\u016f\u017eeme ud\u011blat v kone\u010dn\u00e9m v\u00fdsledku:<\/p>\n<ul>\n<li>Flowmon \u2013 \u0159e\u0161en\u00ed pr\u00e9miov\u00e9 \u00farovn\u011b pro korpor\u00e1tn\u00ed z\u00e1kazn\u00edky;<\/li>\n<li>d\u00edky univerz\u00e1lnosti a kompatibilit\u011b je sb\u011br dat dostupn\u00fd z jak\u00fdchkoliv zdroj\u016f: s\u00ed\u0165ov\u00fdch za\u0159\u00edzen\u00ed (Cisco, Juniper, HPE, Huawei\u2026) nebo vlastn\u00edch sond (Flowmon Probe);<\/li>\n<li>mo\u017enosti \u0161k\u00e1lovatelnosti \u0159e\u0161en\u00ed umo\u017e\u0148uj\u00ed roz\u0161i\u0159ovat funk\u010dnost syst\u00e9mu p\u0159id\u00e1v\u00e1n\u00edm nov\u00fdch modul\u016f a zvy\u0161ovat v\u00fdkon d\u00edky flexibiln\u00edmu p\u0159\u00edstupu k licencov\u00e1n\u00ed;<\/li>\n<li>vzhledem k vyu\u017e\u00edv\u00e1n\u00ed technologi\u00ed bez podpisov\u00e9 anal\u00fdzy syst\u00e9m umo\u017e\u0148uje detekovat i dosud nezn\u00e1m\u00e9 zero-day \u00fatoky, kter\u00e9 neznaj\u00ed antiviry a IDS\/IPS syst\u00e9my;<\/li>\n<li>d\u00edky pln\u00e9 \"transparentnosti\" z pohledu instalace a p\u0159\u00edtomnosti syst\u00e9mu v s\u00edti \u2013 \u0159e\u0161en\u00ed neovliv\u0148uje pr\u00e1ci dal\u0161\u00edch uzl\u016f a komponent va\u0161e infrastruktury IT;<\/li>\n<li>Flowmon \u2013 jedin\u00e9 \u0159e\u0161en\u00ed na trhu, kter\u00e9 podporuje monitorov\u00e1n\u00ed provozu p\u0159i rychlostech a\u017e 100 Gb\/s;<\/li>\n<li>Flowmon \u2013 \u0159e\u0161en\u00ed pro s\u00edt\u011b jak\u00e9hokoliv rozsahu;<\/li>\n<li>nejlep\u0161\u00ed pom\u011br cena \/ funk\u010dnost mezi podobn\u00fdmi \u0159e\u0161en\u00edmi.<\/li>\n<\/ul>\n<p>\nV tomto p\u0159ehledu jsme se pod\u00edvali na m\u00e9n\u011b ne\u017e 10 % celkov\u00fdch funkc\u00ed \u0159e\u0161en\u00ed. V n\u00e1sleduj\u00edc\u00edm \u010dl\u00e1nku v\u00e1m p\u0159edstav\u00edme dal\u0161\u00ed moduly Flowmon Networks. Na p\u0159\u00edkladu modulu Application Performance Monitoring uk\u00e1\u017eeme, jak mohou spr\u00e1vci business aplikac\u00ed zajistit dostupnost na po\u017eadovan\u00e9 \u00farovni SLA a maxim\u00e1ln\u011b rychle diagnostikovat probl\u00e9my.<\/p>\n<p>Tak\u00e9 bychom v\u00e1s r\u00e1di pozvali na n\u00e1\u0161 webin\u00e1\u0159 (10.09.2019), v\u011bnovan\u00fd \u0159e\u0161en\u00edm dodavatele Flowmon Networks. Pro p\u0159edb\u011b\u017enou registraci v\u00e1s pros\u00edme, <noindex><a rel=\"nofollow\" href=\"https:\/\/tssolution.ru\/events\/vebinari_flowmon\">zaregistrujte se zde<\/a><\/noindex>.<br \/>\nNa tomto prozat\u00edm v\u0161e, d\u011bkujeme za v\u00e1\u0161 z\u00e1jem!<\/p>\n<p class=\"for_users_only_msg\">Pouze registrovan\u00ed u\u017eivatel\u00e9 se mohou \u00fa\u010dastnit ankety. <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/auth\/login\/\">P\u0159ihlaste se<\/a><\/noindex>, pros\u00edm.<\/p>\n<h2 class=\"default-block__polling-title\">Pou\u017e\u00edv\u00e1te Netflow pro monitorov\u00e1n\u00ed s\u00edt\u011b?<\/h2>\n<ul class=\"content-list content-list_polling\">\n<li class=\"content-list__item content-list__item_polling\">\n<p>                    Ano<\/p>\n<\/li>\n<li class=\"content-list__item content-list__item_polling\">\n<p>                    Ne, ale pl\u00e1nuj\u00ed<\/p>\n<\/li>\n<li class=\"content-list__item content-list__item_polling\">\n<p>                    Ne<\/p>\n<\/li>\n<\/ul>\n<p>    Hlasovalo 9 u\u017eivatel\u016f. Zdr\u017eelo se 3 u\u017eivatel\u016f.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/tssolution\/blog\/463625\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u0432 \u0418\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0435 \u043c\u043e\u0436\u043d\u043e \u043d\u0430\u0439\u0442\u0438 \u043e\u0433\u0440\u043e\u043c\u043d\u043e\u0435 \u043a\u043e\u043b-\u0432\u043e \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u043e\u0432 \u043f\u043e \u0442\u0435\u043c\u0435 \u0430\u043d\u0430\u043b\u0438\u0437\u0430 \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u043d\u0430 \u043f\u0435\u0440\u0438\u043c\u0435\u0442\u0440\u0435 \u0441\u0435\u0442\u0438. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c \u0432\u0441\u0435 \u043f\u043e\u0447\u0435\u043c\u0443-\u0442\u043e \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u043d\u043e \u0437\u0430\u0431\u044b\u043b\u0438 \u043e\u0431 \u0430\u043d\u0430\u043b\u0438\u0437\u0435 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0442\u0440\u0430\u0444\u0438\u043a\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0435 \u043c\u0435\u043d\u0435\u0435 \u0432\u0430\u0436\u043d\u044b\u043c. \u0414\u0430\u043d\u043d\u0430\u044f \u0441\u0442\u0430\u0442\u044c\u044f \u043a\u0430\u043a \u0440\u0430\u0437 \u0438 \u043f\u043e\u0441\u0435\u0449\u0435\u043d\u0430 \u044d\u0442\u043e\u0439 \u0442\u0435\u043c\u0435. \u041d\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u0435 Flowmon Networks \u043c\u044b \u0432\u0441\u043f\u043e\u043c\u043d\u0438\u043c \u0441\u0442\u0430\u0440\u044b\u0439 \u0434\u043e\u0431\u0440\u044b\u0439 Netflow (\u0438 \u0435\u0433\u043e \u0430\u043b\u044c\u0442\u0435\u0440\u043d\u0430\u0442\u0438\u0432\u044b), \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b\u0435 \u043a\u0435\u0439\u0441\u044b, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":27883,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-37189","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=\"description\" content=\".\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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