{"id":86701,"date":"2020-06-28T19:42:14","date_gmt":"2020-06-28T17:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/uluchshenie-parametrov-bezopasnosti-ssl-soedineniya-v-zimbra-collaboration-suite-open-source-edition"},"modified":"2020-06-28T19:42:14","modified_gmt":"2020-06-28T17:42:14","slug":"uluchshenie-parametrov-bezopasnosti-ssl-soedineniya-v-zimbra-collaboration-suite-open-source-edition","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/uluchshenie-parametrov-bezopasnosti-ssl-soedineniya-v-zimbra-collaboration-suite-open-source-edition","title":{"rendered":"Zlep\u0161enie zabezpe\u010denia SSL pripojenia v Zimbra Collaboration Suite Open-Source Edition","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Spo\u013eahlivos\u0165 \u0161ifrovania je jedn\u00fdm z najd\u00f4le\u017eitej\u0161\u00edch ukazovate\u013eov pri pou\u017e\u00edvan\u00ed informa\u010dn\u00fdch syst\u00e9mov pre podnikanie, preto\u017ee denne sa podie\u013eaj\u00fa na prenosu obrovsk\u00e9ho mno\u017estva d\u00f4vern\u00fdch inform\u00e1ci\u00ed. Be\u017en\u00fdm prostriedkom na hodnotenie kvality SSL pripojenia je nez\u00e1visl\u00fd test od Qualys SSL Labs. Ke\u010f\u017ee tento test m\u00f4\u017ee spusti\u0165 ktoko\u013evek, pre SaaS poskytovate\u013eov je obzvl\u00e1\u0161\u0165 d\u00f4le\u017eit\u00e9, aby bola ich hodnotenie v tomto teste maxim\u00e1lne. O kvalitu SSL pripojenia sa staraj\u00fa nielen SaaS poskytovatelia, ale aj be\u017en\u00e9 podniky. Pre nich je tento test skvelou pr\u00edle\u017eitos\u0165ou na odhalenie potenci\u00e1lne zranite\u013en\u00fdch miest a v\u010dasn\u00e9 uzavretie v\u0161etk\u00fdch medzier pre kyberzlo\u010dincov.<\/p>\n<p><img decoding=\"async\" alt=\"Zlep\u0161enie zabezpe\u010denia SSL pripojenia v Zimbra Collaboration Suite Open-Source Edition\" src=\"\/wp-content\/uploads\/2020\/06\/d6303075bad0b206deb6a75d812aefd8.png\" style=\"display:block;margin: 0 auto;\" \/><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nV Zimbra OSE je povolen\u00e9 pou\u017e\u00edva\u0165 dva typy <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/ssl-sertifikat\/\"   title=\"SSL certifik\u00e1tov\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"344\">SSL certifik\u00e1tov<\/a>. Prv\u00fd \u2014 je to samopodpisovan\u00fd certifik\u00e1t, ktor\u00fd sa automaticky prid\u00e1va po\u010das in\u0161tal\u00e1cie. Tento certifik\u00e1t je zadarmo a nie je \u010dasovo obmedzen\u00fd, \u010do znamen\u00e1, \u017ee je ide\u00e1lny na testovanie Zimbra OSE alebo jej pou\u017e\u00edvanie v\u00fdhradne v r\u00e1mci vn\u00fatornej siete. Av\u0161ak pri pr\u00edstupe do webov\u00e9ho klienta uvidia pou\u017e\u00edvatelia upozornenie od prehliada\u010da, \u017ee tento certifik\u00e1t nie je d\u00f4veryhodn\u00fd, a test od Qualys SSL Labs va\u0161u serverov\u00fa in\u0161tanciu ur\u010dite zlyh\u00e1.<\/p>\n<p>Druh\u00fd \u2014 je to komer\u010dn\u00fd SSL certifik\u00e1t, ktor\u00fd bol podp\u00edsan\u00fd certifika\u010dnou autoritou. Tak\u00e9to certifik\u00e1ty s\u00fa bez probl\u00e9mov akceptovan\u00e9 prehliada\u010dmi a zvy\u010dajne sa pou\u017e\u00edvaj\u00fa pri komer\u010dnej prev\u00e1dzke Zimbra OSE. Hne\u010f po spr\u00e1vnom nain\u0161talovan\u00ed komer\u010dn\u00e9ho certifik\u00e1tu Zimbra OSE 8.8.15 dosahuje hodnotenie A v teste od Qualys SSL Labs. Je to skvel\u00fd v\u00fdsledok, ale na\u0161\u00edm cie\u013eom je dosiahnu\u0165 v\u00fdsledok A+.<\/p>\n<p><img decoding=\"async\" alt=\"Zlep\u0161enie zabezpe\u010denia SSL pripojenia v Zimbra Collaboration Suite Open-Source Edition\" src=\"\/wp-content\/uploads\/2020\/06\/d8788ca0b826e1b7c63e0a487745484b.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Zlep\u0161enie zabezpe\u010denia SSL pripojenia v Zimbra Collaboration Suite Open-Source Edition\" src=\"\/wp-content\/uploads\/2020\/06\/f9c8e0435491a5ab5abe2500978ac7f9.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nAby ste dosiahli maxim\u00e1lne hodnotenie v teste od Qualys SSL Labs pri pou\u017e\u00edvan\u00ed Zimbra Collaboration Suite Open-Source Edition, je potrebn\u00e9 vykona\u0165 nieko\u013eko krokov:<\/p>\n<p><b>1. Zv\u00fd\u0161enie parametrov protokolu Diffie-Hellman<\/b><\/p>\n<p>Predvolene hodnoty parametrov protokolu Diffie-Hellman vo v\u0161etk\u00fdch komponentoch Zimbra OSE 8.8.15, ktor\u00e9 pou\u017e\u00edvaj\u00fa OpenSSL, s\u00fa 2048 bitov. Tento parametr je viac ako dostato\u010dn\u00fd na dosiahnutie hodnotenia A+ v teste od Qualys SSL Labs. Ak v\u0161ak prech\u00e1dzate z star\u0161\u00edch verzi\u00ed, hodnoty parametrov m\u00f4\u017eu by\u0165 ni\u017e\u0161ie. Preto sa odpor\u00fa\u010da po dokon\u010den\u00ed aktualiz\u00e1cie spusti\u0165 pr\u00edkaz zmdhparam set -new 2048, ktor\u00fd zv\u00fd\u0161i parametre protokolu Diffie-Hellman na prijate\u013en\u00fdch 2048 bitov, a ak to je potrebn\u00e9, pomocou tohto pr\u00edkazu je mo\u017en\u00e9 zv\u00fd\u0161i\u0165 hodnotu parametrov na 3072 alebo 4096 bitov, \u010do na jednej strane pred\u013a\u017ei \u010das generovania, no na druhej strane pozit\u00edvne ovplyvn\u00ed \u00farove\u0148 bezpe\u010dnosti po\u0161tov\u00e9ho servera.<\/p>\n<p><b>2. Aktiv\u00e1cia odpor\u00fa\u010dan\u00e9ho zoznamu \u0161ifrovac\u00edch algoritmov<\/b><\/p>\n<p>Z\u00e1kladn\u00e1 verzia Zimbra Collaboration Suite otvoren\u00e9ho zdroja podporuje \u0161irok\u00e9 spektrum siln\u00fdch a slab\u00fdch \u0161ifrov, pomocou ktor\u00fdch sa \u0161ifruj\u00fa \u00fadaje prech\u00e1dzaj\u00face cez zabezpe\u010den\u00e9 pripojenie. Av\u0161ak pou\u017e\u00edvanie slab\u00fdch \u0161ifrov predstavuje v\u00e1\u017eny probl\u00e9m pri kontrole bezpe\u010dnosti SSL pripojenia. Aby sme sa tomu vyhli, je potrebn\u00e9 nastavi\u0165 zoznam pou\u017e\u00edvan\u00fdch \u0161ifrov.<\/p>\n<p>Na to je potrebn\u00e9 vyu\u017ei\u0165 pr\u00edkaz <code>zmprov mcf zimbraReverseProxySSLCiphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128:AES256:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4'<\/code><\/p>\n<p>Tento pr\u00edkaz obsahuje odpor\u00fa\u010dan\u00fd s\u00fabor \u0161ifrov a v\u010faka nemu sa do zoznamu daj\u00fa ihne\u010f zahrn\u00fa\u0165 spo\u013eahliv\u00e9 \u0161ifry a vyl\u00fa\u010di\u0165 nespo\u013eahliv\u00e9. Teraz ost\u00e1va len re\u0161tartova\u0165 uzly s reverzn\u00fdm proxy pomocou pr\u00edkazu zmproxyctl restart. Po re\u0161tartovan\u00ed nadobudn\u00fa zmeny platnos\u0165.<\/p>\n<p>Ak v\u00e1s tento zoznam z r\u00f4znych d\u00f4vodov neuspokojuje, je mo\u017en\u00e9 z neho odstr\u00e1ni\u0165 nieko\u013eko slab\u00fdch \u0161ifrov s pomocou pr\u00edkazu <code>zmprov mcf +zimbraSSLExcludeCipherSuites<\/code>. Napr\u00edklad pr\u00edkaz <code>zmprov mcf +zimbraSSLExcludeCipherSuites TLS_RSA_WITH_RC4_128_MD5 +zimbraSSLExcludeCipherSuites TLS_RSA_WITH_RC4_128_SHA +zimbraSSLExcludeCipherSuites SSL_RSA_WITH_RC4_128_MD5 +zimbraSSLExcludeCipherSuites SSL_RSA_WITH_RC4_128_SHA +zimbraSSLExcludeCipherSuites TLS_ECDHE_RSA_WITH_RC4_128_SHA<\/code>, ktor\u00fd \u00faplne vyl\u00fa\u010di pou\u017e\u00edvanie \u0161ifrov RC4. Takisto je mo\u017en\u00e9 postupova\u0165 aj so \u0161iframi AES a 3DES.<\/p>\n<p><b>3. Aktiv\u00e1cia HSTS<\/b><\/p>\n<p>Aktivovan\u00e9 mechanizmy povinn\u00e9ho zap\u00ednania \u0161ifrovania spojen\u00ed a obnovenia rel\u00e1cie TLS s\u00fa tie\u017e povinn\u00fdmi podmienkami na dosiahnutie najvy\u0161\u0161ieho sk\u00f3re v teste od Qualys SSL Labs. Na ich aktiv\u00e1ciu je potrebn\u00e9 zada\u0165 pr\u00edkaz <code>zmprov mcf +zimbraResponseHeader \"Strict-Transport-Security: max-age=31536000\"<\/code>. Tento pr\u00edkaz prid\u00e1 potrebn\u00fa hlavi\u010dku do konfigur\u00e1cie, a aby nov\u00e9 nastavenia vst\u00fapili do platnosti, bude potrebn\u00e9 re\u0161tartova\u0165 Zimbra OSE pomocou pr\u00edkazu <b>zmcontrol restart<\/b>.<\/p>\n<p>U\u017e v tomto \u0161t\u00e1diu test od Qualys SSL Labs bude ukazova\u0165 hodnotenie A+, av\u0161ak ak chcete \u010falej zlep\u0161i\u0165 bezpe\u010dnos\u0165 v\u00e1\u0161ho servera, je mo\u017en\u00e9 podnikn\u00fa\u0165 \u010fal\u0161ie kroky.<\/p>\n<p><img decoding=\"async\" alt=\"Zlep\u0161enie zabezpe\u010denia SSL pripojenia v Zimbra Collaboration Suite Open-Source Edition\" src=\"\/wp-content\/uploads\/2020\/06\/ca77c335df2de2378b991d8a345dc9ae.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNapr\u00edklad m\u00f4\u017eete aktivova\u0165 povinn\u00e9 \u0161ifrovanie medzi procesn\u00fdmi spojeniami, ako aj povinn\u00e9 \u0161ifrovanie pri pripojen\u00ed k slu\u017eb\u00e1m Zimbra OSE. Na overenie medzi procesn\u00fdch spojen\u00ed zadajte nasleduj\u00face pr\u00edkazy:<\/p>\n<pre><code class=\"plaintext\">zmlocalconfig -e ldap_starttls_supported=1\nzmlocalconfig -e zimbra_require_interprocess_security=1\nzmlocalconfig -e ldap_starttls_required=true<\/code><\/pre>\n<p>\nNa aktiv\u00e1ciu povinn\u00e9ho \u0161ifrovania je potrebn\u00e9 zada\u0165:<\/p>\n<pre><code class=\"plaintext\">zmprov gs `zmhostname` zimbraReverseProxyMailMode\nzmprov ms `zmhostname` zimbraReverseProxyMailMode https\n\nzmprov gs `zmhostname` zimbraMailMode\nzmprov ms `zmhostname` zimbraMailMode https\n\nzmprov gs `zmhostname` zimbraReverseProxySSLToUpstreamEnabled\nzmprov ms `zmhostname` zimbraReverseProxySSLToUpstreamEnabled TRUE<\/code><\/pre>\n<p>V\u010faka t\u00fdmto pr\u00edkazom bud\u00fa v\u0161etky spojenia \u0161ifrovan\u00e9 s proxy-<a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/server\/dts-dusseldorf\/\"   title=\"servermi\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3435\">servermi<\/a> a po\u0161tov\u00fdmi servermi, a taktie\u017e bude vykon\u00e1van\u00e9 proxyovanie v\u0161etk\u00fdch t\u00fdchto spojen\u00ed.<\/p>\n<p><img decoding=\"async\" alt=\"Zlep\u0161enie zabezpe\u010denia SSL pripojenia v Zimbra Collaboration Suite Open-Source Edition\" src=\"\/wp-content\/uploads\/2020\/06\/e129b3fda82417414c2b284f7b4bea94.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTakto, dodr\u017eiavan\u00edm na\u0161ich odpor\u00fa\u010dan\u00ed, m\u00f4\u017eete nielen dosiahnu\u0165 najvy\u0161\u0161ie hodnotenie v teste bezpe\u010dnosti SSL spojenia, ale aj v\u00fdrazne zv\u00fd\u0161i\u0165 bezpe\u010dnos\u0165 celej infra\u0161trukt\u00fary Zimbra OSE.<\/p>\n<p>Na v\u0161etky ot\u00e1zky t\u00fdkaj\u00face sa Zextras Suite m\u00f4\u017eete kontaktova\u0165 z\u00e1stupky\u0148u spolo\u010dnosti \u201eZextras\u201c Ekaterinu Triandafiliidi na e-mailovej adrese katerina@zextras.com<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/zimbra\/blog\/508372\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0430\u0434\u0435\u0436\u043d\u043e\u0441\u0442\u044c \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043e\u0434\u043d\u0438\u043c \u0438\u0437 \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u0432\u0430\u0436\u043d\u044b\u0445 \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u0435\u0439 \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0434\u043b\u044f \u0431\u0438\u0437\u043d\u0435\u0441\u0430, \u0432\u0435\u0434\u044c \u0435\u0436\u0435\u0434\u043d\u0435\u0432\u043d\u043e \u043e\u043d\u0438 \u0443\u0447\u0430\u0441\u0442\u0432\u0443\u044e\u0442 \u0432 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435 \u043e\u0433\u0440\u043e\u043c\u043d\u043e\u0433\u043e \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u0430 \u043a\u043e\u043d\u0444\u0438\u0434\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438. \u041e\u0431\u0449\u0435\u043f\u0440\u0438\u043d\u044f\u0442\u044b\u043c \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e\u043c \u043e\u0446\u0435\u043d\u043a\u0438 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0430 SSL-\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u044b\u0439 \u0442\u0435\u0441\u0442 \u043e\u0442 Qualys SSL Labs. \u041f\u043e\u0441\u043a\u043e\u043b\u044c\u043a\u0443 \u0434\u0430\u043d\u043d\u044b\u0439 \u0442\u0435\u0441\u0442 \u043c\u043e\u0436\u0435\u0442 \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c \u043a\u0442\u043e \u0443\u0433\u043e\u0434\u043d\u043e, \u0434\u043b\u044f SaaS-\u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u043e\u0432 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e \u0432\u0430\u0436\u043d\u043e, \u0447\u0442\u043e\u0431\u044b \u043e\u0446\u0435\u043d\u043a\u0430 \u0432 \u044d\u0442\u043e\u043c \u0442\u0435\u0441\u0442\u0435 \u0431\u044b\u043b\u0430 \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0439. \u041e [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":86702,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-86701","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 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