{"id":53013,"date":"2019-11-21T00:00:00","date_gmt":"2019-11-20T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/zimbra-i-zashhita-ot-spama"},"modified":"2020-02-18T14:00:51","modified_gmt":"2020-02-18T11:00:51","slug":"zimbra-i-zashhita-ot-spama","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/administrirovanie\/zimbra-i-zashhita-ot-spama","title":{"rendered":"Zimbra \u00e9s spamv\u00e9delem","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A saj\u00e1t levelez\u0151szerver\u00e9vel rendelkez\u0151 v\u00e1llalatok sz\u00e1m\u00e1ra az egyik legfontosabb feladat a spam\u00fczenetek sz\u0171r\u00e9se. A spam okozta k\u00e1r nyilv\u00e1nval\u00f3: nemcsak a v\u00e1llalat inform\u00e1ci\u00f3biztons\u00e1g\u00e1t fenyegeti, hanem helyet foglal el a szerver merevlemez\u00e9n, \u00e9s cs\u00f6kkenti az alkalmazottak hat\u00e9konys\u00e1g\u00e1t, amikor azok az \u201eBej\u00f6v\u0151 \u00fczenetek\u201d k\u00f6z\u00f6tt tal\u00e1lkoznak vele. A nem k\u00edv\u00e1natos levelek elk\u00fcl\u00f6n\u00edt\u00e9se az \u00fczleti levelez\u00e9st\u0151l nem olyan egyszer\u0171 feladat, mint amilyennek l\u00e1tszik. Az a helyzet, hogy olyan megold\u00e1s, amely garant\u00e1lja a sz\u00e1zsz\u00e1zal\u00e9kos eredm\u00e9nyt a nem k\u00edv\u00e1nt \u00fczenetek kisz\u0171r\u00e9s\u00e9ben, egyszer\u0171en nem l\u00e9tezik, \u00e9s egy nem megfelel\u0151en be\u00e1ll\u00edtott algoritmus, amely a nem k\u00edv\u00e1nt levelek azonos\u00edt\u00e1s\u00e1ra szolg\u00e1l, sokkal nagyobb k\u00e1rt okozhat a v\u00e1llalatnak, mint a spam \u00f6nmag\u00e1ban.<\/p>\n

\"Zimbra
\n<\/a><\/noindex>
\nA Zimbra Collaboration Suite a spam elleni v\u00e9delm\u00e9t az Amavis szabad forr\u00e1sk\u00f3d\u00fa szoftvercsomag seg\u00edts\u00e9g\u00e9vel val\u00f3s\u00edtja meg, amely megval\u00f3s\u00edtja az SPF, DKIM protokollokat, \u00e9s t\u00e1mogatja a feketelist\u00e1kat, feh\u00e9rlist\u00e1kat, valamint a sz\u00fcrke list\u00e1kat. Az Amavis mellett a Zimbra a ClamAV antiv\u00edrus \u00e9s a SpamAssassin spam sz\u0171r\u0151 haszn\u00e1lat\u00e1t is mag\u00e1ban foglalja. Jelenleg a SpamAssassin a legjobb megold\u00e1s a spam sz\u0171r\u00e9s\u00e9re. Az a m\u0171k\u00f6d\u00e9si elve, hogy minden bej\u00f6v\u0151 levelet megvizsg\u00e1l a spamra jellemz\u0151 regul\u00e1ris kifejez\u00e9sek alapj\u00e1n. Minden egyes elfogadott teszt ut\u00e1n a SpamAssassin egy bizonyos sz\u00e1m\u00fa pontot rendel a lev\u00e9lhez. Min\u00e9l t\u00f6bb pontot kap a v\u00e9g\u00e9n, ann\u00e1l val\u00f3sz\u00edn\u0171bb, hogy az elemzett lev\u00e9l spam.<\/p>\n

Ez a bej\u00f6v\u0151 levelek \u00e9rt\u00e9kel\u00e9si rendszere lehet\u0151v\u00e9 teszi a sz\u0171r\u0151 viszonylag rugalmas be\u00e1ll\u00edt\u00e1s\u00e1t. K\u00fcl\u00f6n\u00f6sen be lehet \u00e1ll\u00edtani azt a pontsz\u00e1mot, amelyn\u00e9l a lev\u00e9l gyan\u00fasnak min\u0151s\u00fcl, \u00e9s a \u201eSpam\u201d mapp\u00e1ba k\u00fcldik, valamint azt a pontsz\u00e1mot, amelyn\u00e9l a lev\u00e9l v\u00e9glegesen t\u00f6rl\u00e9sre ker\u00fcl. Ha a spam sz\u0171r\u0151t \u00edgy \u00e1ll\u00edtj\u00e1k be, akkor k\u00e9t k\u00e9rd\u00e9st lehet egyszerre megoldani: egyr\u00e9szt elker\u00fclni a haszontalan spam\u00fczenetek miatt \u00e9rt\u00e9kes merevlemez-ter\u00fclet elfoglal\u00e1s\u00e1t, m\u00e1sr\u00e9szt a legkisebbre cs\u00f6kkenteni a spam sz\u0171r\u0151je miatt kihagyott \u00fczleti levelek sz\u00e1m\u00e1t.<\/p>\n

\"Zimbra
\n
\nA legf\u0151bb probl\u00e9ma, amellyel a Zimbra orosz felhaszn\u00e1l\u00f3i szembes\u00fclhetnek, az a be\u00e9p\u00edtett spam v\u00e9delem hi\u00e1nya, amely nem k\u00e9pes sz\u0171rni az orosz nyelv\u0171 spamet alap\u00e9rtelmezetten. Ennek oka a cirill sz\u00f6veghez tartoz\u00f3 be\u00e9p\u00edtett szab\u00e1lyok hi\u00e1nya. Nyugati koll\u00e9g\u00e1k ezt a k\u00e9rd\u00e9st \u00fagy oldj\u00e1k meg, hogy minden orosz nyelv\u0171 levelet automatikusan t\u00f6r\u00f6lnek. Val\u00f3ban, nehezen elk\u00e9pzelhet\u0151, hogy b\u00e1rki, aki a j\u00f3zan esz\u00e9n\u00e9l van, \u00fczleti levelez\u00e9st folytasson eur\u00f3pai v\u00e1llalatokkal orosz nyelven. Azonban az orosz felhaszn\u00e1l\u00f3k nem tehetik ezt. R\u00e9szben megoldhatja ezt a probl\u00e9m\u00e1t az orosz szab\u00e1lyok hozz\u00e1ad\u00e1sa a Spamassassin sz\u00e1m\u00e1ra<\/a><\/noindex>, azonban azok aktualit\u00e1sa \u00e9s megb\u00edzhat\u00f3s\u00e1ga nem garant\u00e1lt.<\/p>\n

A Zimbra Collaboration Suite ny\u00edlt forr\u00e1sk\u00f3dja \u00e9s sz\u00e9les k\u00f6r\u0171 elterjedts\u00e9ge lehet\u0151v\u00e9 teszi m\u00e1s, k\u00f6zt\u00fck kereskedelmi megold\u00e1sok integr\u00e1l\u00e1s\u00e1t az inform\u00e1ci\u00f3biztons\u00e1g \u00e9rdek\u00e9ben. Azonban a legoptim\u00e1lisabb megold\u00e1s egy felh\u0151alap\u00fa kiberv\u00e9delmi rendszer lehet. A felh\u0151v\u00e9delem be\u00e1ll\u00edt\u00e1s\u00e1t \u00e1ltal\u00e1ban mind a szolg\u00e1ltat\u00f3 oldal\u00e1n, mind a helyi szerver oldal\u00e1n v\u00e9gzik. A be\u00e1ll\u00edt\u00e1s l\u00e9nyege, hogy a helyi bej\u00f6v\u0151 e-mail c\u00edm\u00e9t a felh\u0151szerver c\u00edm\u00e9re cser\u00e9lik, ahol a levelek sz\u0171r\u00e9se t\u00f6rt\u00e9nik, majd a minden ellen\u0151rz\u00e9sen \u00e1tesett leveleket a v\u00e1llalati c\u00edmre ir\u00e1ny\u00edtj\u00e1k. <\/p>\n

Ez a rendszer egyszer\u0171 c\u00edmcsere r\u00e9v\u00e9n csatlakozik IP-c\u00edmnek<\/a> a POP3 bej\u00f6v\u0151 levelez\u0151 szerver MX-bejegyz\u00e9s\u00e9ben az \u00f6n felh\u0151 megold\u00e1s\u00e1nak IP c\u00edm\u00e9re. M\u00e1s sz\u00f3val, ha kor\u00e1bban a helyi szerver MX-bejegyz\u00e9se k\u00f6r\u00fclbel\u00fcl \u00edgy n\u00e9zett ki:<\/p>\n

domain.com. IN MX 0 pop
\ndomain.com. IN MX 10 pop
\npop IN A 192.168.1.100<\/p><\/blockquote>\n

\nakkor a szolg\u00e1ltat\u00f3 \u00e1ltal biztos\u00edtott biztons\u00e1gi felh\u0151nek megfelel\u0151 IP c\u00edmre t\u00f6rt\u00e9n\u0151 csere ut\u00e1n az adat \u00edgy m\u00f3dosul:<\/p>\n

domain.com. IN MX 0 pop
\ndomain.com. IN MX 10 pop
\npop IN A 26.35.232.80<\/p><\/blockquote>\n

\nA be\u00e1ll\u00edt\u00e1s sor\u00e1n a felh\u0151platform szem\u00e9lyes fi\u00f3kj\u00e1ban sz\u00fcks\u00e9ges megadni a dom\u00e9n c\u00edm\u00e9t, ahonnan a nem sz\u0171rt e-mailek \u00e9rkeznek, valamint a dom\u00e9n c\u00edm\u00e9t, ahov\u00e1 a sz\u0171rt leveleket kell k\u00fcldeni. E l\u00e9p\u00e9sek ut\u00e1n az e-mailek sz\u0171r\u00e9se a harmadik f\u00e9l szerverein fog t\u00f6rt\u00e9nni, akik felel\u0151ss\u00e9get v\u00e1llalnak a bej\u00f6v\u0151 levelek biztons\u00e1g\u00e1\u00e9rt a v\u00e1llalatn\u00e1l.<\/p>\n

A Zimbra Collaboration Suite kiv\u00e1l\u00f3 v\u00e1laszt\u00e1s lehet mind a kisv\u00e1llalkoz\u00e1sok sz\u00e1m\u00e1ra, akiknek sz\u00fcks\u00e9g\u00fck van egy biztons\u00e1gos, de k\u00f6lts\u00e9ghat\u00e9kony e-mail megold\u00e1sra, mind a nagyv\u00e1llalatok sz\u00e1m\u00e1ra, amelyek folyamatosan dolgoznak a kiberfenyeget\u00e9sekkel kapcsolatos kock\u00e1zatok cs\u00f6kkent\u00e9s\u00e9n.<\/p>\n

A Zextras Suite-tel kapcsolatos k\u00e9rd\u00e9sekkel Katarina Triandafiladihez, a \u00abZextras\u00bb c\u00e9g k\u00e9pvisel\u0151j\u00e9hez fordulhat a katerina@zextras.com e-mail c\u00edmen.
\n
Forr\u00e1s: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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