{"id":52324,"date":"2019-11-06T00:00:00","date_gmt":"2019-11-05T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/hvatit-ispolzovat-smehotvorno-malyj-ttl-dlya-dns"},"modified":"2021-01-02T13:04:14","modified_gmt":"2021-01-02T11:04:14","slug":"hvatit-ispolzovat-smehotvorno-malyj-ttl-dlya-dns","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/hvatit-ispolzovat-smehotvorno-malyj-ttl-dlya-dns","title":{"rendered":"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>D\u00ebnda e ul\u00ebt DNS \u00ebsht\u00eb nj\u00eb faktor ky\u00e7 p\u00ebr nj\u00eb performanc\u00eb t\u00eb shpejt\u00eb n\u00eb internet. P\u00ebr ta minimizuar, \u00ebsht\u00eb e r\u00ebnd\u00ebsishme t\u00eb zgjidhni me kujdes server\u00ebt DNS dhe <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/DNSCrypt\/dnscrypt-resolvers\/blob\/master\/v2\/relays.md\">rillet anonime<\/a><\/noindex>. Por fillimisht duhet t\u00eb eliminojm\u00eb k\u00ebrkesat e panevojshme.<\/p>\n<p>Pik\u00ebrisht p\u00ebr k\u00ebt\u00eb arsye DNS fillimisht u krijua si nj\u00eb protokoll me shum\u00eb keq t\u00eb ruajtur. Administrator\u00ebt e zonave vendosin koh\u00ebn e jet\u00ebs (TTL) p\u00ebr regjistrimet e ve\u00e7anta, nd\u00ebrsa rezolver\u00ebt e p\u00ebrdorin k\u00ebt\u00eb informacion p\u00ebr t\u00eb ruajtur regjistrimet n\u00eb memorie, p\u00ebr t\u00eb shmangur trafikun e panevojsh\u00ebm.<\/p>\n<p>A \u00ebsht\u00eb efikase keqburimi? Disa vjet m\u00eb par\u00eb, nj\u00eb hulumtim i vog\u00ebl i tregoi se nuk \u00ebsht\u00eb perfekt. Le t\u00eb shikojm\u00eb situat\u00ebn aktuale.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nP\u00ebr t\u00eb mbledhur informacion, kam patch-uar <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jedisct1\/encrypted-dns-server\">Serverin DNS t\u00eb Enkriptuar<\/a><\/noindex> p\u00ebr t\u00eb ruajtur vler\u00ebn TTL p\u00ebr p\u00ebrgjigjen. Ajo p\u00ebrcaktohet si TTL minimale e regjistrimeve t\u00eb tij, p\u00ebr \u00e7do k\u00ebrkes\u00eb n\u00eb hyrje. Kjo jep nj\u00eb pamje t\u00eb mir\u00eb t\u00eb shp\u00ebrndarjes s\u00eb TTL t\u00eb trafikut real, si dhe merr parasysh popullaritetin e k\u00ebrkesave t\u00eb ve\u00e7anta. Versioni i patch-uar i serverit punoi p\u00ebr disa or\u00eb.<\/p>\n<p>Grupi i t\u00eb dh\u00ebnave p\u00ebrb\u00ebhet nga 1&nbsp;583&nbsp;579 regjistrime (emri, tipi i k\u00ebrkes\u00ebs, TTL, timestamp). K\u00ebtu \u00ebsht\u00eb shp\u00ebrndarja e p\u00ebrgjithshme e TTL (aksis X - \u00ebsht\u00eb TTL n\u00eb sekonda):<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/ce19a1ceb07e1fd2f3b2284f86271eac.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>N\u00ebse nuk e llogarisim nj\u00eb kod t\u00eb vog\u00ebl n\u00eb 86&nbsp;400 ( kryesisht p\u00ebr regjistrimet SOA), \u00ebsht\u00eb mjaft e qart\u00eb se TTL jan\u00eb t\u00eb ulta. Le t\u00eb shohim m\u00eb af\u00ebr:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/abbe48952b616e1c5bdb18c2dc103dc7.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Mir\u00eb, TTL mbi 1 or\u00eb nuk jan\u00eb statistikorisht t\u00eb r\u00ebnd\u00ebsishme. Pra, le t\u00eb p\u00ebrqendrohemi n\u00eb diapazonin 0\u22123600:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/f8a88267e1868a55d9234f66ad8c5dee.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Shumica e TTL nga 0 deri n\u00eb 15 minuta:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/aab650c806097513a5924e5262211ea5.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Nj\u00eb shumic\u00eb e madhe nga 0 deri n\u00eb 5 minuta:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/736af4b33b745fb0d5070200fa511426.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Kjo nuk \u00ebsht\u00eb shum\u00eb mir\u00eb.<\/p>\n<p>Shp\u00ebrndarja akumuluese e b\u00ebn problemin edhe m\u00eb t\u00eb qart\u00eb:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/a3a4f03188dd6dbbf4558076b827f6a5.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>N\u00eb gjysm\u00ebn e p\u00ebrgjigjeve DNS, TTL \u00ebsht\u00eb 1 minut\u00eb ose m\u00eb pak, nd\u00ebrsa p\u00ebr tre t\u00eb kat\u00ebrtat&nbsp;\u2014 5 minuta ose m\u00eb pak.<\/p>\n<p>Por prit, n\u00eb fakt \u00ebsht\u00eb edhe m\u00eb keq. Sepse k\u00ebto jan\u00eb TTL nga server\u00ebt autoritativ\u00eb. Megjithat\u00eb, rezolver\u00ebt klient\u00eb (p.sh., router\u00ebt, cache t\u00eb vendosura lokale) marrin TTL nga rezolver\u00ebt e sip\u00ebrm, dhe ai zvog\u00eblohet \u00e7do sekond\u00eb.<\/p>\n<p>Prandaj, klienti n\u00eb fakt mund t\u00eb p\u00ebrdor\u00eb \u00e7do regjistrim, mesatarisht, p\u00ebr gjysm\u00eb t\u00eb TTL-t\u00eb fillestar, pas s\u00eb cil\u00ebs do t\u00eb d\u00ebrgoj\u00eb nj\u00eb k\u00ebrkes\u00eb t\u00eb re.<\/p>\n<p>Mund t\u00eb jet\u00eb se k\u00ebto TTL shum\u00eb t\u00eb ulta lidhen vet\u00ebm me k\u00ebrkesa t\u00eb pazakonta dhe jo me site t\u00eb njohura dhe API? Le t\u00eb shohim:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/2680f9669a90f449a593edcc84ca0dc8.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Aksisi X&nbsp;\u2014 \u00ebsht\u00eb TTL, aksisi Y&nbsp;\u2014 popullariteti i k\u00ebrkesave.<\/p>\n<p>Fatkeq\u00ebsisht, k\u00ebrkesat m\u00eb t\u00eb popullarizuara gjithashtu kan\u00eb keqburimin m\u00eb t\u00eb dob\u00ebt.<\/p>\n<p>Le ta afrojm\u00eb:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/c670382b195169779743f43fd7b15827.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Verdikti: gjendja \u00ebsht\u00eb me t\u00eb v\u00ebrtet\u00eb e keqe. Ka qen\u00eb e keqe m\u00eb par\u00eb, dhe tani \u00ebsht\u00eb akoma m\u00eb keq. Keqmbushja DNS ka b\u00ebr\u00eb pothuajse t\u00eb pahijshme. Meq\u00eb gjithnj\u00eb e m\u00eb pak njer\u00ebz p\u00ebrdorin rezolutorin DNS t\u00eb ofruesit t\u00eb tyre (p\u00ebr arsye t\u00eb drejt\u00eb), rritja e vones\u00ebs b\u00ebhet m\u00eb e dukshme.<\/p>\n<p>Keqmbushja DNS \u00ebsht\u00eb e dobishme vet\u00ebm p\u00ebr p\u00ebrmbajtjen q\u00eb askush nuk viziton.<\/p>\n<p>Gjithashtu, vini re se software-i mund <noindex><a rel=\"nofollow\" href=\"https:\/\/00f.net\/2011\/11\/17\/how-long-does-a-dns-ttl-last\/\">t\u00eb interpretoj\u00eb ndryshe<\/a><\/noindex> TTL-t\u00eb e ul\u00ebta.<\/p>\n<h1>Pse \u00ebsht\u00eb k\u00ebshtu?<\/h1>\n<p>Pse vendosen TTL kaq t\u00eb ul\u00ebta p\u00ebr regjistrimet DNS?<\/p>\n<ul>\n<li>Balancuesit e ngarkes\u00ebs t\u00eb vjet\u00ebruar kan\u00eb mbetur me konfigurime t\u00eb paracaktuara.<\/li>\n<li>Ka mite q\u00eb thon\u00eb se balancimi i ngarkes\u00ebs me DNS varet nga TTL (nuk \u00ebsht\u00eb k\u00ebshtu \u2014 q\u00eb nga Netscape Navigator, klient\u00ebt zgjedhin nj\u00eb adres\u00eb IP t\u00eb rast\u00ebsishme nga grupi RR dhe provojn\u00eb n\u00eb m\u00ebnyr\u00eb t\u00eb qart\u00eb nj\u00eb tjet\u00ebr, n\u00ebse nuk mund t\u00eb lidhen)<\/li>\n<li>Administrator\u00ebt duan t\u00eb aplikojn\u00eb ndryshime menj\u00ebher\u00eb, sepse \u00ebsht\u00eb m\u00eb e leht\u00eb t\u00eb planifikosh.<\/li>\n<li>Administratori i serverit DNS ose balancuesit t\u00eb ngarkes\u00ebs e sheh si detyr\u00eb t\u00eb tij t\u00eb shp\u00ebrndaj\u00eb n\u00eb m\u00ebnyr\u00eb efektive konfigurimin q\u00eb k\u00ebrkojn\u00eb p\u00ebrdoruesit, dhe jo t\u00eb p\u00ebrshpejtoj\u00eb funksionimin e faqeve dhe sh\u00ebrbimeve.<\/li>\n<li>TTL-t\u00eb e ul\u00ebta ofrojn\u00eb qet\u00ebsi mendore.<\/li>\n<li>Njer\u00ebzit fillimisht vendosin TTL t\u00eb ul\u00ebt p\u00ebr t\u00eb testuar dhe pastaj harrojn\u00eb t'i ndryshojn\u00eb.<\/li>\n<\/ul>\n<p>Nuk e p\u00ebrfshiva \u2018p\u00ebrballimin e d\u00ebshtimit\u2019 n\u00eb list\u00eb, sepse \u00ebsht\u00eb gjithnj\u00eb e m\u00eb pak relevante. N\u00ebse duhet t\u00eb redirigjosh p\u00ebrdoruesit n\u00eb nj\u00eb rrjet tjet\u00ebr vet\u00ebm p\u00ebr t\u00eb shfaqur nj\u00eb faqe gabimi kur gjith\u00e7ka tjet\u00ebr ka d\u00ebshtuar, ndoshta nj\u00eb vones\u00eb mbi 1 minut\u00eb \u00ebsht\u00eb e pranueshme.<\/p>\n<p>P\u00ebr m\u00eb tep\u00ebr, nj\u00eb TTL nj\u00eb minut\u00ebsh do t\u00eb thot\u00eb se n\u00ebse serverat autoritativ\u00eb DNS bllokohen p\u00ebr m\u00eb shum\u00eb se 1 minut\u00eb, askush tjet\u00ebr nuk do t\u00eb ket\u00eb mund\u00ebsi t\u00eb aksesoj\u00eb sh\u00ebrbimet e varura. Dhe mbivendosja nuk ndihmon, n\u00ebse shkaku \u00ebsht\u00eb nj\u00eb gabim konfigurimi ose nj\u00eb thyerje. Nga ana tjet\u00ebr, me TTL t\u00eb arsyeshme shum\u00eb klient\u00eb do t\u00eb vazhdojn\u00eb t\u00eb p\u00ebrdorin konfigurimin e m\u00ebparsh\u00ebm dhe kurr\u00eb nuk do ta v\u00ebn\u00eb re.<\/p>\n<p>TTL-t\u00eb e ul\u00ebta jan\u00eb kryesisht t\u00eb faj\u00ebsuar p\u00ebr sh\u00ebrbimet CDN dhe balancuesit e ngarkes\u00ebs, ve\u00e7an\u00ebrisht kur ata bashkojn\u00eb CNAME me TTL t\u00eb ul\u00ebta dhe regjistrime me TTL t\u00eb tilla (por t\u00eb pavarura) t\u00eb ul\u00ebta:<\/p>\n<pre>$ drill raw.githubusercontent.com\nraw.githubusercontent.com.\t9\tIN\tCNAME\tgithub.map.fastly.net.\ngithub.map.fastly.net.\t20\tIN\tA\t151.101.128.133\ngithub.map.fastly.net.\t20\tIN\tA\t151.101.192.133\ngithub.map.fastly.net.\t20\tIN\tA\t151.101.0.133\ngithub.map.fastly.net.\t20\tIN\tA\t151.101.64.133<\/pre>\n<p>\u00c7do her\u00eb q\u00eb skadon CNAME ose ndonj\u00eb nga regjistrimet A, duhet t\u00eb d\u00ebrgohet nj\u00eb k\u00ebrkes\u00eb e re. T\u00eb dy kan\u00eb nj\u00eb TTL prej 30 sekondash, por ato nuk p\u00ebrputhen. TTL mesatar real do t\u00eb jet\u00eb 15 sekonda.<\/p>\n<p>Por prisni! \u00cbsht\u00eb akoma m\u00eb keq. Disa rezolvues veprojn\u00eb shum\u00eb keq n\u00eb nj\u00eb situat\u00eb t\u00eb till\u00eb me dy TTL t\u00eb ul\u00ebta t\u00eb lidhura:<\/p>\n<pre>$ drill raw.githubusercontent.com @4.2.2.2\nraw.githubusercontent.com.\t1\tIN\tCNAME\tgithub.map.fastly.net.\ngithub.map.fastly.net.\t1\tIN\tA\t151.101.16.133<\/pre>\n<p>Rezolvuesi Level3, ndoshta, punon me BIND. N\u00ebse vazhdoni t\u00eb d\u00ebrgoni k\u00ebt\u00eb k\u00ebrkes\u00eb, gjithmon\u00eb do t\u00eb kthehet nj\u00eb TTL q\u00eb \u00ebsht\u00eb 1. Po n\u00eb esenc\u00eb, <code>raw.githubusercontent.com<\/code> kurr\u00eb nuk ruhet n\u00eb cache.<\/p>\n<p>Ja nj\u00eb tjet\u00ebr shembull i till\u00eb me nj\u00eb domen shum\u00eb t\u00eb njohur:<\/p>\n<pre>$ drill detectportal.firefox.com @1.1.1.1\ndetectportal.firefox.com.\t25\tIN\tCNAME\tdetectportal.prod.mozaws.net.\ndetectportal.prod.mozaws.net.\t26\tIN\tCNAME\tdetectportal.firefox.com-v2.edgesuite.net.\ndetectportal.firefox.com-v2.edgesuite.net.\t10668\tIN\tCNAME\ta1089.dscd.akamai.net.\na1089.dscd.akamai.net.\t10\tIN\tA\t104.123.50.106\na1089.dscd.akamai.net.\t10\tIN\tA\t104.123.50.88<\/pre>\n<p>T\u00eb pakt\u00ebn tre regjistrime CNAME. Ah. Nj\u00eb ka nj\u00eb TTL t\u00eb arsyesh\u00ebm, por kjo \u00ebsht\u00eb krejt\u00ebsisht e pafrytshme. N\u00eb t\u00eb tjerat, TTL fillestar i CNAME \u00ebsht\u00eb 60 sekonda, por p\u00ebr domenet <code>akamai.net<\/code> TTL maks \u00ebsht\u00eb 20 sekonda, dhe asnj\u00ebra prej tyre nuk \u00ebsht\u00eb n\u00eb faz\u00eb.<\/p>\n<p>Si p\u00ebr domenet q\u00eb n\u00ebnshkruajn\u00eb vazhdimisht pajisjet Apple?<\/p>\n<pre>$ drill 1-courier.push.apple.com @4.2.2.2\n1-courier.push.apple.com.\t1253\tIN\tCNAME\t1.courier-push-apple.com.akadns.net.\n1.courier-push-apple.com.akadns.net.\t1\tIN\tCNAME\tgb-courier-4.push-apple.com.akadns.net.\ngb-courier-4.push-apple.com.akadns.net.\t1\tIN\tA\t17.57.146.84\ngb-courier-4.push-apple.com.akadns.net.\t1\tIN\tA\t17.57.146.85<\/pre>\n<p>E nj\u00ebjta problem si me Firefox, dhe TTL do t\u00eb ngel\u00ebt shumic\u00ebn e koh\u00ebs n\u00eb 1 sekond\u00eb kur p\u00ebrdoret rezolvuesi Level3.<\/p>\n<p>Dropbox?<\/p>\n<pre>$ drill client.dropbox.com @8.8.8.8\nclient.dropbox.com.\t7\tIN\tCNAME\tclient.dropbox-dns.com.\nclient.dropbox-dns.com.\t59\tIN\tA\t162.125.67.3\n\n$ drill client.dropbox.com @4.2.2.2\nclient.dropbox.com.\t1\tIN\tCNAME\tclient.dropbox-dns.com.\nclient.dropbox-dns.com.\t1\tIN\tA\t162.125.64.3<\/pre>\n<p>N\u00eb regjistrimin <code>safebrowsing.googleapis.com<\/code> vlera TTL \u00ebsht\u00eb 60 sekonda, si n\u00eb rastin e domen\u00ebve t\u00eb Facebook. Dhe, p\u00ebrs\u00ebri, nga k\u00ebndv\u00ebshtrimi i klientit, k\u00ebto vlera reduktohen me gjysm\u00eb.<\/p>\n<h1>Si p\u00ebrvendosjen e nj\u00eb TTL minimal?<\/h1>\n<p>Duke p\u00ebrdorur emrin, llojin e k\u00ebrkes\u00ebs, TTL dhe timestampin fillestar t\u00eb ruajtur, shkrova nj\u00eb skript p\u00ebr t\u00eb imituar 1,5 milion k\u00ebrkesa q\u00eb kalojn\u00eb p\u00ebrmes nj\u00eb rezolvuesi me cache, p\u00ebr t\u00eb vler\u00ebsuar sasin\u00eb e k\u00ebrkesave t\u00eb tep\u00ebrta q\u00eb d\u00ebrgohen p\u00ebr shkak t\u00eb nj\u00eb regjistrimi t\u00eb skaduar n\u00eb cache.<\/p>\n<p>47.4% e k\u00ebrkesave u b\u00ebn\u00eb pas skadimit t\u00eb nj\u00eb regjistrimi ekzistues. Kjo \u00ebsht\u00eb nj\u00eb p\u00ebrqindje e tep\u00ebrt.<\/p>\n<p>Cila do t\u00eb jet\u00eb ndikimi n\u00eb caching n\u00ebse vendoset nj\u00eb TTL minimal?<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/3abd417d312450519b45f66865b23763.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Aksi X \u00ebsht\u00eb vlerat minimale TTL. Rekordet me TTL origjinale m\u00eb t\u00eb larta se kjo vler\u00eb nuk preken.<\/p>\n<p>Aksi Y \u00ebsht\u00eb p\u00ebrqindja e k\u00ebrkesave nga klienti, i cili tashm\u00eb ka nj\u00eb rekord t\u00eb ruajtur, por me afatin e skadimit t\u00eb kaluar dhe b\u00ebn nj\u00eb k\u00ebrkes\u00eb t\u00eb re.<\/p>\n<p>Shpresa e \"k\u00ebrkesave t\u00eb tep\u00ebrta\" bie nga 47% n\u00eb 36% me thjesht vendosjen e TTL minimale n\u00eb 5 minuta. Me vendosjen e TTL minimale n\u00eb 15 minuta, numri i k\u00ebtyre k\u00ebrkesave bie n\u00eb 29%. TTL minimale n\u00eb 1 or\u00eb e ul k\u00ebto k\u00ebrkesa n\u00eb 17%. Diferenca e konsiderueshme!<\/p>\n<p>\u00c7far\u00eb mendoni t\u00eb mos ndryshoni asgj\u00eb n\u00eb server, dhe p\u00ebrkundrazi t\u00eb vendosni TTL minimale n\u00eb cache-t e DNS t\u00eb klient\u00ebve (rrug\u00ebtar\u00ebt, rezolutor\u00ebt lokal\u00eb)?<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft me p\u00ebrdorimin e nj\u00eb TTL t\u00eb paarsyesh\u00ebm t\u00eb vog\u00ebl p\u00ebr DNS\" src=\"\/wp-content\/uploads\/2019\/11\/107a2bd53797d421d65ac7260bf78dfe.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Numri i k\u00ebrkesave t\u00eb nevojshme bie nga 47% n\u00eb 34% me vendosjen e TTL minimale n\u00eb 5 minuta, n\u00eb 25% me nj\u00eb minimum prej 15 minutash dhe n\u00eb 13% me nj\u00eb minimum prej 1 ore. Ndoshta, vlera optimale \u00ebsht\u00eb 40 minuta.<\/p>\n<p>Ndikimi i k\u00ebtij ndryshimi minimal \u00ebsht\u00eb i madh.<\/p>\n<h1>Cilat jan\u00eb pasojat?<\/h1>\n<p>Sigurisht, sh\u00ebrbimi mund t\u00eb transferohet te nj\u00eb ofrues t\u00eb ri t\u00eb cloud, nj\u00eb server i ri, nj\u00eb rrjet i ri, duke k\u00ebrkuar nga klient\u00ebt t\u00eb p\u00ebrdorin rekordet m\u00eb t\u00eb fundit DNS. Dhe nj\u00eb TTL mjaft i vog\u00ebl ndihmon n\u00eb nj\u00eb kalim t\u00eb till\u00eb pa probleme dhe pa u v\u00ebn\u00eb re. Por me kalimin n\u00eb infrastruktur\u00eb t\u00eb re, askush nuk pret q\u00eb klient\u00ebt t\u00eb kalojn\u00eb n\u00eb rekordet e reja DNS brenda 1 minute, 5 minutave ose 15 minutash. Vendosja e nj\u00eb afati minimal jet\u00ebshkurt\u00ebr prej 40 minutash n\u00eb vend t\u00eb 5 minutave nuk do t\u00eb pengoj\u00eb p\u00ebrdoruesit t\u00eb ken\u00eb qasje n\u00eb sh\u00ebrbim.<\/p>\n<p>Megjithat\u00eb, kjo do t\u00eb reduktoj\u00eb ndjesh\u00ebm vones\u00ebn dhe do t\u00eb rris\u00eb intimitetin dhe besueshm\u00ebrin\u00eb, duke shmangur k\u00ebrkesat e panevojshme.<\/p>\n<p>Sigurisht, RFC thon\u00eb q\u00eb duhet t\u00eb respektohen rrept\u00ebsisht TTL. Por realiteti \u00ebsht\u00eb se sistemi DNS ka b\u00ebr\u00eb shum\u00eb t\u00eb paefikas.<\/p>\n<p>N\u00ebse punoni me servera autoritativ\u00eb DNS, ju lutemi kontrolloni TTL-t tuaj. A ju nevojiten vlera kaq qesharake t\u00eb ul\u00ebta?<\/p>\n<p>Sigurisht, ka arsye t\u00eb forta p\u00ebr vendosjen e TTL t\u00eb vogla p\u00ebr rekordet DNS. Por jo p\u00ebr 75% t\u00eb trafikut DNS, i cili ndryshon praktikisht.<\/p>\n<p>Dhe n\u00ebse p\u00ebr ndonj\u00eb arsye ju nevojitet v\u00ebrtet p\u00ebrdorimi i TTL t\u00eb ul\u00ebta p\u00ebr DNS, sigurohuni gjithashtu q\u00eb n\u00eb faqen tuaj t\u00eb mos jet\u00eb aktivizuar ruajtja. P\u00ebr t\u00eb nj\u00ebjtat arsye.<\/p>\n<p>N\u00ebse keni nj\u00eb cache lokale DNS, si\u00e7 \u00ebsht\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dnscrypt\/dnscrypt-proxy\">dnscrypt-proxy<\/a><\/noindex>, i cili ju lejon t\u00eb vendosni TTL minimale, p\u00ebrdorni k\u00ebt\u00eb funksion. \u00cbsht\u00eb n\u00eb rregull. Asgj\u00eb e keqe nuk do ndodh\u00eb. Vendosni nj\u00eb TTL minimal midis 40 minutash (2400 sekonda) dhe 1 ore. Nj\u00eb gam\u00eb krejt\u00ebsisht e arsyeshme.<\/p>\n<p>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/474450\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0438\u0437\u043a\u0430\u044f \u0437\u0430\u0434\u0435\u0440\u0436\u043a\u0430 DNS \u2014 \u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0439 \u0444\u0430\u043a\u0442\u043e\u0440 \u0434\u043b\u044f \u0431\u044b\u0441\u0442\u0440\u043e\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u0432 \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0435. \u0427\u0442\u043e\u0431\u044b \u0435\u0451 \u043c\u0438\u043d\u0438\u043c\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u0442\u044c, \u0432\u0430\u0436\u043d\u043e \u0442\u0449\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u043f\u043e\u0434\u043e\u0431\u0440\u0430\u0442\u044c DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u044b \u0438 \u0430\u043d\u043e\u043d\u0438\u043c\u043d\u044b\u0435 \u0440\u0438\u043b\u0435\u0438. \u041d\u043e \u043f\u0435\u0440\u0432\u044b\u043c \u0434\u0435\u043b\u043e\u043c \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0438\u0437\u0431\u0430\u0432\u0438\u0442\u044c\u0441\u044f \u043e\u0442 \u0431\u0435\u0441\u043f\u043e\u043b\u0435\u0437\u043d\u044b\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432. \u0418\u043c\u0435\u043d\u043d\u043e \u043f\u043e\u044d\u0442\u043e\u043c\u0443 DNS \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u0441\u043e\u0437\u0434\u0430\u0432\u0430\u043b\u0441\u044f \u043a\u0430\u043a \u0441\u0438\u043b\u044c\u043d\u043e \u043a\u044d\u0448\u0438\u0440\u0443\u0435\u043c\u044b\u0439 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b. \u0410\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u044b \u0437\u043e\u043d \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u044e\u0442 \u0432\u0440\u0435\u043c\u044f \u0436\u0438\u0437\u043d\u0438 (TTL) \u0434\u043b\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0437\u0430\u043f\u0438\u0441\u0435\u0439, \u0430 \u0440\u0435\u0437\u043e\u043b\u0432\u0435\u0440\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442 \u044d\u0442\u0443 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044e \u043f\u0440\u0438 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u0438 \u0437\u0430\u043f\u0438\u0441\u0435\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-52324","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" 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