{"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\/hu\/blog\/administrirovanie\/uluchshenie-parametrov-bezopasnosti-ssl-soedineniya-v-zimbra-collaboration-suite-open-source-edition","title":{"rendered":"Az SSL kapcsolat biztons\u00e1gi param\u00e9tereinek jav\u00edt\u00e1sa a Zimbra Collaboration Suite Open-Source Editionben","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A titkos\u00edt\u00e1s megb\u00edzhat\u00f3s\u00e1ga az egyik legfontosabb t\u00e9nyez\u0151 az \u00fczleti informatikai rendszerek haszn\u00e1latakor, mivel ezek naponta hatalmas mennyis\u00e9g\u0171 bizalmas inform\u00e1ci\u00f3t tov\u00e1bb\u00edtanak. Az SSL-kapcsolat min\u0151s\u00e9g\u00e9nek f\u00fcggetlen \u00e9rt\u00e9kel\u00e9s\u00e9re a Qualys SSL Labs tesztje a legelterjedtebb. Mivel ezt a tesztet b\u00e1rki lefuttathatja, a SaaS szolg\u00e1ltat\u00f3k sz\u00e1m\u00e1ra k\u00fcl\u00f6n\u00f6sen fontos, hogy a teszt \u00e9rt\u00e9kel\u00e9se maxim\u00e1lis legyen. Az SSL-kapcsolat min\u0151s\u00e9g\u00e9re nemcsak a SaaS szolg\u00e1ltat\u00f3k, hanem a hagyom\u00e1nyos v\u00e1llalatok is figyelnek. Sz\u00e1mukra ez a teszt nagyszer\u0171 lehet\u0151s\u00e9get k\u00edn\u00e1l a potenci\u00e1lis sebezhet\u0151s\u00e9gek azonos\u00edt\u00e1s\u00e1ra \u00e9s a kiberb\u0171n\u00f6z\u0151k \u00fatj\u00e1nak el\u0151zetes elz\u00e1r\u00e1s\u00e1ra.<\/p>\n<p><img decoding=\"async\" alt=\"Az SSL kapcsolat biztons\u00e1gi param\u00e9tereinek jav\u00edt\u00e1sa a Zimbra Collaboration Suite Open-Source Editionben\" src=\"\/wp-content\/uploads\/2020\/06\/d6303075bad0b206deb6a75d812aefd8.png\" style=\"display:block;margin: 0 auto;\" \/><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nA Zimbra OSE-ben k\u00e9tfajta tan\u00fas\u00edtv\u00e1ny haszn\u00e1lata megengedett. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/ssl-sertifikat\/\"   title=\"SSL tan\u00fas\u00edtv\u00e1nyok\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"344\">SSL tan\u00fas\u00edtv\u00e1nyok<\/a>Az els\u0151 egy \u00f6nhiteles\u00edtett tan\u00fas\u00edtv\u00e1ny, amely automatikusan hozz\u00e1ad\u00f3dik a telep\u00edt\u00e9s sor\u00e1n. Ez a tan\u00fas\u00edtv\u00e1ny ingyenes \u00e9s id\u0151ben korl\u00e1tlan, \u00edgy ide\u00e1lisan alkalmas a Zimbra OSE tesztel\u00e9s\u00e9re vagy kiz\u00e1r\u00f3lag a bels\u0151 h\u00e1l\u00f3zaton val\u00f3 haszn\u00e1latra. Azonban a webklienseb\u0151l val\u00f3 bel\u00e9p\u00e9skor a felhaszn\u00e1l\u00f3k figyelmeztet\u00e9st l\u00e1tnak a b\u00f6ng\u00e9sz\u0151j\u00fckben, hogy ez a tan\u00fas\u00edtv\u00e1ny nem megb\u00edzhat\u00f3, \u00e9s a Qualys SSL Labs tesztj\u00e9n a szervere egy\u00e9rtelm\u0171en megbukik.<\/p>\n<p>A m\u00e1sodik egy kereskedelmi SSL-tan\u00fas\u00edtv\u00e1ny, amelyet hiteles\u00edt\u00e9ssel foglalkoz\u00f3 k\u00f6zpont \u00edrt al\u00e1. Az ilyen tan\u00fas\u00edtv\u00e1nyokat a b\u00f6ng\u00e9sz\u0151k probl\u00e9mamentesen kezelik, \u00e9s \u00e1ltal\u00e1ban kereskedelmi c\u00e9lokra haszn\u00e1lj\u00e1k a Zimbra OSE eset\u00e9ben. A kereskedelmi tan\u00fas\u00edtv\u00e1ny helyes telep\u00edt\u00e9se ut\u00e1n a Zimbra OSE 8.8.15 A \u00e9rt\u00e9kel\u00e9st mutat a Qualys SSL Labs tesztj\u00e9n. Ez kiv\u00e1l\u00f3 eredm\u00e9ny, de a c\u00e9lunk az A+ eredm\u00e9ny el\u00e9r\u00e9se.<\/p>\n<p><img decoding=\"async\" alt=\"Az SSL kapcsolat biztons\u00e1gi param\u00e9tereinek jav\u00edt\u00e1sa a Zimbra Collaboration Suite Open-Source Editionben\" src=\"\/wp-content\/uploads\/2020\/06\/d8788ca0b826e1b7c63e0a487745484b.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Az SSL kapcsolat biztons\u00e1gi param\u00e9tereinek jav\u00edt\u00e1sa a Zimbra Collaboration Suite Open-Source Editionben\" src=\"\/wp-content\/uploads\/2020\/06\/f9c8e0435491a5ab5abe2500978ac7f9.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA maxim\u00e1lis \u00e9rt\u00e9kel\u00e9s el\u00e9r\u00e9s\u00e9hez a Qualys SSL Labs tesztj\u00e9n a Zimbra Collaboration Suite Open-Source Edition haszn\u00e1latakor sz\u00e1mos l\u00e9p\u00e9st kell k\u00f6vetni:<\/p>\n<p><b>1. A Diffie-Hellman protokoll param\u00e9tereinek n\u00f6vel\u00e9se<\/b><\/p>\n<p>Alap\u00e9rtelmez\u00e9s szerint a Zimbra OSE 8.8.15 \u00f6sszes OpenSSL-t haszn\u00e1l\u00f3 \u00f6sszetev\u0151j\u00e9ben a Diffie-Hellman protokoll param\u00e9terek \u00e9rt\u00e9ke 2048 bit. Ez \u00e1ltal\u00e1ban b\u0151ven elegend\u0151 az A+ min\u0151s\u00edt\u00e9s megszerz\u00e9s\u00e9hez a Qualys SSL Labs tesztj\u00e9n. Ha azonban r\u00e9gebbi verzi\u00f3kr\u00f3l friss\u00edt, a param\u00e9terek \u00e9rt\u00e9ke alacsonyabb lehet. Ez\u00e9rt javasolt a friss\u00edt\u00e9s befejez\u00e9se ut\u00e1n futtatni a zmdhparam set -new 2048 parancsot, amely emeli a Diffie-Hellman protokoll param\u00e9tereket az elfogadhat\u00f3 2048 bitre. Sz\u00fcks\u00e9g eset\u00e9n ezzel a parancsal 3072 vagy 4096 bitre is emelheti az \u00e9rt\u00e9ket, ami egyr\u00e9szt n\u00f6veli a gener\u00e1l\u00e1si id\u0151t, m\u00e1sr\u00e9szt kedvez\u0151en hat a levelez\u0151szerver biztons\u00e1gi szintj\u00e9re.<\/p>\n<p><b>2. Aj\u00e1nlott titkos\u00edtott list\u00e1k enged\u00e9lyez\u00e9se<\/b><\/p>\n<p>Alap\u00e9rtelmez\u00e9s szerint a Zimbra Collaboration Suite Open-Source Edition sz\u00e9lesk\u00f6r\u0171 er\u0151s \u00e9s gyenge titkos\u00edt\u00e1si algoritmusokat t\u00e1mogat, amelyekkel a v\u00e9dett kapcsolaton \u00e1thalad\u00f3 adatokat titkos\u00edtj\u00e1k. Azonban a gyenge titkos\u00edt\u00e1sok haszn\u00e1lata jelent\u0151s h\u00e1tr\u00e1nyt jelent az SSL-kapcsolat biztons\u00e1goss\u00e1g\u00e1nak ellen\u0151rz\u00e9sekor. Ezen probl\u00e9m\u00e1k elker\u00fcl\u00e9se \u00e9rdek\u00e9ben be kell \u00e1ll\u00edtani a haszn\u00e1lt titkos\u00edt\u00e1si algoritmusok list\u00e1j\u00e1t.<\/p>\n<p>Ehhez haszn\u00e1lja a parancsot <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>Ez a parancs az aj\u00e1nlott titkos\u00edt\u00e1sok k\u00e9szlet\u00e9t azonnal tartalmazza, \u00edgy a megb\u00edzhat\u00f3 titkos\u00edt\u00f3kat azonnal a list\u00e1ban lehet elhelyezni, mik\u00f6zben a megb\u00edzhatatlanokat ki lehet z\u00e1rni. Most m\u00e1r csak annyit kell tennie, hogy \u00fajraind\u00edtja a h\u00e1ts\u00f3 proxy csom\u00f3pontokat a zmproxyctl restart parancs seg\u00edts\u00e9g\u00e9vel. Az \u00fajraind\u00edt\u00e1s ut\u00e1n a v\u00e9grehajtott v\u00e1ltoztat\u00e1sok \u00e9rv\u00e9nybe l\u00e9pnek.<\/p>\n<p>Ha ez a lista valamilyen okb\u00f3l nem megfelel\u0151 az \u00d6n sz\u00e1m\u00e1ra, bizonyos gyenge titkos\u00edt\u00e1sokat elt\u00e1vol\u00edthat a k\u00f6vetkez\u0151 parancs seg\u00edts\u00e9g\u00e9vel <code>zmprov mcf +zimbraSSLExcludeCipherSuites<\/code>. P\u00e9ld\u00e1ul a parancs <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>, amely teljes m\u00e9rt\u00e9kben kiz\u00e1rja az RC4 titkos\u00edt\u00f3 haszn\u00e1lat\u00e1t. Ugyanezt megteheti az AES \u00e9s 3DES titkos\u00edt\u00f3k eset\u00e9ben is.<\/p>\n<p><b>3. HSTS enged\u00e9lyez\u00e9se<\/b><\/p>\n<p>Az \u00f6sszes TLS kapcsolatra vonatkoz\u00f3 titkos\u00edt\u00e1s \u00e9s a kapcsolatok helyre\u00e1ll\u00edt\u00e1s\u00e1nak k\u00f6telez\u0151 \u00e9rv\u00e9ny\u0171 aktiv\u00e1l\u00e1sa szint\u00e9n k\u00f6telez\u0151 a Qualys SSL Labs teszt\u00e9n\u00e9l a legmagasabb pontsz\u00e1m elnyer\u00e9s\u00e9hez. Ezek enged\u00e9lyez\u00e9s\u00e9hez a k\u00f6vetkez\u0151 parancsot kell be\u00edrni: <code>zmprov mcf +zimbraResponseHeader \"Strict-Transport-Security: max-age=31536000\"<\/code>. Ez a parancs hozz\u00e1adja a sz\u00fcks\u00e9ges fejl\u00e9cet a konfigur\u00e1ci\u00f3hoz, \u00e9s az \u00faj be\u00e1ll\u00edt\u00e1sok \u00e9rv\u00e9nyes\u00edt\u00e9s\u00e9hez \u00fajra kell ind\u00edtani a Zimbra OSE-t a k\u00f6vetkez\u0151 paranccsal: <b>zmcontrol restart<\/b>.<\/p>\n<p>M\u00e1r ezen a ponton a Qualys SSL Labs teszt A+ \u00e9rt\u00e9kel\u00e9st fog mutatni, de ha szeretn\u00e9 tov\u00e1bbi jav\u00edtani a szerver biztons\u00e1g\u00e1t, akkor m\u00e9g sz\u00e1mos int\u00e9zked\u00e9st megtehet.<\/p>\n<p><img decoding=\"async\" alt=\"Az SSL kapcsolat biztons\u00e1gi param\u00e9tereinek jav\u00edt\u00e1sa a Zimbra Collaboration Suite Open-Source Editionben\" src=\"\/wp-content\/uploads\/2020\/06\/ca77c335df2de2378b991d8a345dc9ae.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nP\u00e9ld\u00e1ul enged\u00e9lyezheti a k\u00f6ztes folyamatok k\u00f6z\u00f6tti titkos\u00edt\u00e1s k\u00e9nyszer\u00edt\u00e9s\u00e9t, valamint a Zimbra OSE szolg\u00e1ltat\u00e1sokhoz val\u00f3 csatlakoz\u00e1skor is k\u00f6telez\u0151v\u00e9 teheti a titkos\u00edt\u00e1st. A k\u00f6ztes folyamatok k\u00f6z\u00f6tti kapcsolatok ellen\u0151rz\u00e9s\u00e9hez a k\u00f6vetkez\u0151 parancsokat kell be\u00edrni:<\/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>\nA k\u00f6telez\u0151 titkos\u00edt\u00e1s enged\u00e9lyez\u00e9s\u00e9hez be kell \u00edrni:<\/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>Ezekkel a parancsokkal az \u00f6sszes kapcsolat titkos\u00edtva lesz a proxy-<a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/dts-dusseldorf\/\"   title=\"szerverek\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3435\">szerverek<\/a> \u00e9s levelez\u0151szerverekkel, valamint minden ilyen kapcsolat proxyz\u00e1sa is megval\u00f3sul.<\/p>\n<p><img decoding=\"async\" alt=\"Az SSL kapcsolat biztons\u00e1gi param\u00e9tereinek jav\u00edt\u00e1sa a Zimbra Collaboration Suite Open-Source Editionben\" src=\"\/wp-content\/uploads\/2020\/06\/e129b3fda82417414c2b284f7b4bea94.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n\u00cdgy k\u00f6vetve aj\u00e1nl\u00e1sainkat, nemcsak a SSL kapcsolat biztons\u00e1gi tesztj\u00e9n \u00e9rheti el a legmagasabb \u00e9rt\u00e9kel\u00e9st, hanem jelent\u0151sen n\u00f6velheti a Zimbra OSE teljes infrastrukt\u00far\u00e1j\u00e1nak biztons\u00e1g\u00e1t is.<\/p>\n<p>B\u00e1rmilyen k\u00e9rd\u00e9se van a Zextras Suitere vonatkoz\u00f3an, a Zextras c\u00e9g k\u00e9pvisel\u0151j\u00e9hez, Trianda Katerin\u00e1hoz fordulhat a katerina@zextras.com e-mail c\u00edmen.<br \/>\n<br \/>Forr\u00e1s: <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 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