{"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\/ro\/blog\/administrirovanie\/zimbra-i-zashhita-ot-spama","title":{"rendered":"Zimbra \u0219i protec\u021bia \u00eempotriva spam-ului","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Una dintre sarcinile cheie cu care se confrunt\u0103 administratorul propriului server de e-mail \u00eentr-o \u00eentreprindere este filtrarea mesajelor care con\u021bin spam. Daunele provocate de spam sunt evidente \u0219i clare: pe l\u00e2ng\u0103 amenin\u021barea la adresa securit\u0103\u021bii informa\u021bionale a \u00eentreprinderii, acesta ocup\u0103 spa\u021biu pe hard disk-ul serverului \u0219i reduce eficien\u021ba angaja\u021bilor atunci c\u00e2nd apare \u00een 'Cutia de primire'. Separarea mesajelor de marketing nedorite de coresponden\u021ba de afaceri nu este o sarcin\u0103 at\u00e2t de simpl\u0103 pe c\u00e2t pare la prima vedere. Motivul este c\u0103 nu exist\u0103 solu\u021bii care s\u0103 garanteze un rezultat de sut\u0103 la sut\u0103 \u00een filtrarea mesajelor nedorite, iar un algoritm de detectare a spamului configurat incorect poate provoca mai multe daune \u00eentreprinderii dec\u00e2t spamul \u00een sine.<\/p>\n

\"Zimbra
\n<\/a><\/noindex>
\n\u00cen Zimbra Collaboration Suite, protec\u021bia \u00eempotriva spamului este realizat\u0103 prin intermediul pachetului software open-source Amavis, care implementeaz\u0103 SPF, DKIM \u0219i suport\u0103 liste negre, liste albe \u0219i liste gri. Pe l\u00e2ng\u0103 Amavis, Zimbra utilizeaz\u0103 antivirusul ClamAV \u0219i filtrul de spam SpamAssassin. \u00cen prezent, SpamAssassin este solu\u021bia optim\u0103 pentru filtrarea spamului. Principiul s\u0103u de func\u021bionare const\u0103 \u00een faptul c\u0103 fiecare mesaj intrant este verificat pentru a vedea dac\u0103 corespunde expresiilor regulate caracteristice mesajelor nedorite. Dup\u0103 fiecare verificare efectuat\u0103, SpamAssassin atribuie mesajului un anumit num\u0103r de puncte. Cu c\u00e2t se acumuleaz\u0103 mai multe puncte la finalul verific\u0103rii, cu at\u00e2t mai mare este probabilitatea ca mesajul analizat s\u0103 fie spam.<\/p>\n

Aceast\u0103 sistem\u0103 de evaluare a mesajelor intrante permite o configurare destul de flexibil\u0103 a filtrului. \u00cen special, se poate stabili num\u0103rul de puncte la care un mesaj va fi considerat suspect \u0219i va fi trimis \u00een folderul 'Spam', sau se poate stabili num\u0103rul de puncte la care un mesaj va fi \u0219ters permanent. Configur\u00e2nd astfel filtrul de spam, se pot rezolva dou\u0103 probleme imediat: pe de o parte, se poate evita umplerea spa\u021biului valoros pe disco cu spam inutil, iar pe de alt\u0103 parte, se poate reduce la minimum num\u0103rul mesajelor de afaceri pierdute din cauza func\u021bion\u0103rii filtrului de spam.<\/p>\n

\"Zimbra
\n
\nProblema principal\u0103 cu care se pot confrunta utilizatorii Zimbra din Rusia este lipsa preg\u0103tirii sistemului anti-spam integrat pentru filtrarea spamului \u00een limba rus\u0103 din start. Motivul acestei situa\u021bii este absen\u021ba regulilor \u00eencorporate pentru textul chirilic. Colegii din vest rezolv\u0103 aceast\u0103 problem\u0103 prin \u0219tergerea necondi\u021bionat\u0103 a tuturor mesajelor \u00een limba rus\u0103. \u0218i, \u00eentr-adev\u0103r, este pu\u021bin probabil ca cineva aflat \u00een mintea s\u0103n\u0103toas\u0103 s\u0103 \u00eencerce s\u0103 comunice de afaceri cu companiile europene \u00een limba rus\u0103. Totu\u0219i, utilizatorii din Rusia nu pot proceda astfel. O solu\u021bie par\u021bial\u0103 pentru aceast\u0103 problem\u0103 ar putea fi ad\u0103ugarea regulilor ruse\u0219ti pentru Spamassassin<\/a><\/noindex>, \u00eens\u0103 actualitatea \u0219i fiabilitatea acestora nu sunt garantate.<\/p>\n

Datorit\u0103 r\u0103sp\u00e2ndirii mari \u0219i codului surs\u0103 deschis, \u00een Zimbra Collaboration Suite pot fi integrate \u0219i alte solu\u021bii, inclusiv comerciale, pentru asigurarea securit\u0103\u021bii informa\u021biei. Totu\u0219i, cea mai optim\u0103 variant\u0103 ar putea fi un sistem de protec\u021bie \u00een cloud \u00eempotriva amenin\u021b\u0103rilor cibernetice. Configurarea protec\u021biei \u00een cloud se efectueaz\u0103 de obicei at\u00e2t de c\u0103tre furnizorul de servicii, c\u00e2t \u0219i de c\u0103tre serverul local. Esen\u021ba configur\u0103rii const\u0103 \u00een faptul c\u0103 adresa local\u0103 pentru e-mailul de intrare este \u00eenlocuit\u0103 cu adresa serverului cloud, unde se realizeaz\u0103 filtrarea mesajelor, iar apoi, dup\u0103 verific\u0103rile efectuate, mesajele sunt redirec\u021bionate c\u0103tre adresa companiei. <\/p>\n

Un astfel de sistem se conecteaz\u0103 printr-o simpl\u0103 \u00eenlocuire adresa IP<\/a> a serverului POP3 pentru e-mailul de intrare \u00een \u00eenregistr\u0103rile MX ale serverului cu adresa IP a solu\u021biei dumneavoastr\u0103 cloud. Cu alte cuvinte, dac\u0103 anterior \u00eenregistrarea MX a serverului local ar\u0103ta cam a\u0219a:<\/p>\n

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

\nAtunci, dup\u0103 \u00eenlocuirea adresei IP cu cea pe care o furnizeaz\u0103 furnizorul de servicii de securitate cloud (s\u0103 presupunem c\u0103 va fi 26.35.232.80), \u00eenregistrarea se va schimba \u00een urm\u0103toarea:<\/p>\n

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

\nDe asemenea, \u00een timpul configur\u0103rii, \u00een panoul personal al platformei cloud, va fi necesar s\u0103 specifica\u021bi adresa domeniului de la care va veni e-mailul nefiltreat \u0219i adresa domeniului unde trebuie trimise mesajele filtrate. Dup\u0103 aceste ac\u021biuni, filtrarea e-mailului dumneavoastr\u0103 se va realiza pe serverele unei organiza\u021bii ter\u021be, care va fi responsabil\u0103 pentru securitatea e-mailului de intrare \u00een companie.<\/p>\n

Astfel, Zimbra Collaboration Suite este ideal at\u00e2t pentru micile afaceri care necesit\u0103 o solu\u021bie de e-mail sigur\u0103 \u0219i accesibil\u0103, c\u00e2t \u0219i pentru marile companii care lucreaz\u0103 constant la reducerea riscurilor asociate cu amenin\u021b\u0103rile cibernetice.<\/p>\n

Pentru orice \u00eentreb\u0103ri legate de Zextras Suite, pute\u021bi contacta reprezentanta companiei \u00abZextras\u00bb, Katerina Triandaefilidi, prin e-mail la katerina@zextras.com.
\n
Sursa: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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