{"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 t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Vonesa e ul\u00ebt e DNS \u00ebsht\u00eb nj\u00eb faktor ky\u00e7 p\u00ebr funksionimin e shpejt\u00eb n\u00eb internet. P\u00ebr ta minimizuar at\u00eb, \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 e anonim\u00ebve<\/a><\/noindex>. Por fillimisht duhet t\u00eb heqim dor\u00eb nga k\u00ebrkesat e padobishme.<\/p>\n<p>Pik\u00ebrisht p\u00ebr k\u00ebt\u00eb arsye, DNS \u00ebsht\u00eb krijuar fillimisht si nj\u00eb protokoll shum\u00eb i ruajtur. Administrator\u00ebt e zon\u00ebs vendosin koh\u00ebn e jet\u00ebs (TTL) p\u00ebr regjistrimet e ndryshme, nd\u00ebrsa rezolutoret e p\u00ebrdorin k\u00ebt\u00eb informacion kur ruajn\u00eb regjistrimet n\u00eb memorje, p\u00ebr t\u00eb shmangur trafikun e panevojsh\u00ebm.<\/p>\n<p>A \u00ebsht\u00eb efikase ruajtja? Para disa vitesh, nj\u00eb studim i vog\u00ebl i imi tregoi se nuk \u00ebsht\u00eb e p\u00ebrsosur. Le t\u00eb shohim situat\u00ebn aktuale.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nP\u00ebr t\u00eb mbledhur informacione, un\u00eb kam patchuar <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jedisct1\/encrypted-dns-server\">Encrypted DNS Server<\/a><\/noindex> p\u00ebr t\u00eb ruajtur vler\u00ebn TTL p\u00ebr p\u00ebrgjigjen. Ajo p\u00ebrcaktohet si TTL m\u00eb i vog\u00ebl i regjistrimeve t\u00eb tij p\u00ebr \u00e7do k\u00ebrkes\u00eb q\u00eb hyn. Kjo ofron 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 patchuar i serverit punoi p\u00ebr disa or\u00eb.<\/p>\n<p>\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u043d\u0430\u0431\u043e\u0440 \u0434\u0430\u043d\u043d\u044b\u0445 \u0441\u043e\u0441\u0442\u043e\u0438\u0442 \u0438\u0437 1&nbsp;583&nbsp;579 \u0437\u0430\u043f\u0438\u0441\u0435\u0439 (name, qtype, TTL, timestamp). \u0412\u043e\u0442 \u043e\u0431\u0449\u0435\u0435 \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 TTL (\u043e\u0441\u044c X \u2014 \u044d\u0442\u043e TTL \u0432 \u0441\u0435\u043a\u0443\u043d\u0434\u0430\u0445):<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/ce19a1ceb07e1fd2f3b2284f86271eac.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>\u0415\u0441\u043b\u0438 \u043d\u0435 \u0441\u0447\u0438\u0442\u0430\u0442\u044c \u043d\u0435\u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0431\u0443\u0433\u0440\u0430 \u043d\u0430 86&nbsp;400 (\u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c, \u0434\u043b\u044f \u0437\u0430\u043f\u0438\u0441\u0435\u0439 SOA), \u0434\u043e\u0432\u043e\u043b\u044c\u043d\u043e \u043e\u0447\u0435\u0432\u0438\u0434\u043d\u043e, \u0447\u0442\u043e TTL \u043d\u0430\u0445\u043e\u0434\u044f\u0442\u0441\u044f \u0432 \u043d\u0438\u0437\u043a\u043e\u043c \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u0435. \u041f\u043e\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u0431\u043b\u0438\u0436\u0435:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/abbe48952b616e1c5bdb18c2dc103dc7.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Mir\u00eb, TTL m\u00eb shum\u00eb se 1 or\u00eb nuk jan\u00eb statistike t\u00eb r\u00ebnd\u00ebsishme. At\u00ebher\u00eb, le t\u00eb p\u00ebrqendrohemi n\u00eb gam\u00ebn 0\u20133600:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/f8a88267e1868a55d9234f66ad8c5dee.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Shumica e TTL jan\u00eb nga 0 deri n\u00eb 15 minuta:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/aab650c806097513a5924e5262211ea5.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Pjesa d\u00ebrrmuese nga 0 deri n\u00eb 5 minuta:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" 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 duksh\u00ebm:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/a3a4f03188dd6dbbf4558076b827f6a5.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>\u0412 \u043f\u043e\u043b\u043e\u0432\u0438\u043d\u0435 DNS-\u043e\u0442\u0432\u0435\u0442\u043e\u0432 TTL \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 1 \u043c\u0438\u043d\u0443\u0442\u0443 \u0438\u043b\u0438 \u043c\u0435\u043d\u044c\u0448\u0435, \u0430 \u0443 \u0442\u0440\u0451\u0445 \u0447\u0435\u0442\u0432\u0435\u0440\u0442\u0435\u0439&nbsp;\u2014 5 \u043c\u0438\u043d\u0443\u0442 \u0438\u043b\u0438 \u043c\u0435\u043d\u044c\u0448\u0435.<\/p>\n<p>Por prisni, n\u00eb t\u00eb v\u00ebrtet\u00eb \u00ebsht\u00eb ende m\u00eb keq. Sepse k\u00ebto jan\u00eb TTL nga serverat autoritativ\u00eb. Megjithat\u00eb, resolvuesit e klient\u00ebve (p\u00ebr shembull, routerat, cache lokale) marrin TTL nga resolvuesit e lart\u00eb, dhe ai zvog\u00eblohet \u00e7do sekond\u00eb.<\/p>\n<p>Prandaj, klienti n\u00eb fakt mund t\u00eb p\u00ebrdor\u00eb \u00e7do regjist\u00ebr, n\u00eb mesatare, p\u00ebr gjysm\u00ebn e TTL origjinal, pas s\u00eb cil\u00ebs do t\u00eb d\u00ebrgoj\u00eb nj\u00eb k\u00ebrkes\u00eb t\u00eb re.<\/p>\n<p>Ndoshta k\u00ebto TTL shum\u00eb t\u00eb ul\u00ebta lidhen vet\u00ebm me k\u00ebrkesat e pazakonta, e jo me faqet e njohura t\u00eb internetit dhe API-t\u00eb? Le t\u00eb shohim:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/2680f9669a90f449a593edcc84ca0dc8.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>\u041e\u0441\u044c X&nbsp;\u2014 \u044d\u0442\u043e TTL, \u043e\u0441\u044c Y&nbsp;\u2014 \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432.<\/p>\n<p>K\u00ebtu \u00ebsht\u00eb nj\u00eb zhg\u00ebnjim: k\u00ebrkesat m\u00eb t\u00eb njohura ashtu si edhe kan\u00eb nj\u00eb memorie t\u00eb keqe.<\/p>\n<p>T\u00eb afrohemi:<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/c670382b195169779743f43fd7b15827.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Verdikti \u00ebsht\u00eb: gjith\u00e7ka n\u00eb t\u00eb v\u00ebrtet\u00eb \u00ebsht\u00eb keq. Ka qen\u00eb keq m\u00eb her\u00ebt, por tani ka p\u00ebrkeq\u00ebsuar. Keshimi DNS \u00ebsht\u00eb b\u00ebr\u00eb praktikisht i pavler\u00eb. Me sa m\u00eb pak njer\u00ebz q\u00eb p\u00ebrdorin zgjidh\u00ebsit DNS t\u00eb ofruesve t\u00eb tyre (p\u00ebr arsye t\u00eb besueshme), rritja e vones\u00ebs b\u00ebhet m\u00eb e dukshme.<\/p>\n<p>Keshimi DNS \u00ebsht\u00eb b\u00ebr\u00eb i dobish\u00ebm vet\u00ebm p\u00ebr p\u00ebrmbajtjen q\u00eb askush nuk e viziton.<\/p>\n<p>Gjithashtu, vini re se softueri mund <noindex><a rel=\"nofollow\" href=\"https:\/\/00f.net\/2011\/11\/17\/how-long-does-a-dns-ttl-last\/\">t\u00eb interpretoj\u00eb n\u00eb m\u00ebnyra t\u00eb ndryshme<\/a><\/noindex> TTL t\u00eb ul\u00ebt.<\/p>\n<h1>Pse k\u00ebshtu?<\/h1>\n<p>Pse \u00ebsht\u00eb vendosur nj\u00eb TTL kaq i ul\u00ebt p\u00ebr t\u00eb dh\u00ebnat DNS?<\/p>\n<ul>\n<li>Balancuesit e ngarkes\u00ebs t\u00eb vjet\u00ebruar kan\u00eb mbetur me nd\u00ebrlikime t\u00eb paracaktuara.<\/li>\n<li>\u0425\u043e\u0434\u044f\u0442 \u043c\u0438\u0444\u044b, \u0447\u0442\u043e \u0431\u0430\u043b\u0430\u043d\u0441\u0438\u0440\u043e\u0432\u043a\u0430 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u043f\u043e DNS \u0437\u0430\u0432\u0438\u0441\u0438\u0442 \u043e\u0442 TTL (\u044d\u0442\u043e \u043d\u0435 \u0442\u0430\u043a&nbsp;\u2014 \u0441\u043e \u0432\u0440\u0435\u043c\u0451\u043d Netscape Navigator \u043a\u043b\u0438\u0435\u043d\u0442\u044b \u0432\u044b\u0431\u0438\u0440\u0430\u044e\u0442 \u0441\u043b\u0443\u0447\u0430\u0439\u043d\u044b\u0439 IP-\u0430\u0434\u0440\u0435\u0441 \u0438\u0437 \u043d\u0430\u0431\u043e\u0440\u0430 RR \u0438 \u043f\u0440\u043e\u0437\u0440\u0430\u0447\u043d\u043e \u043f\u0440\u043e\u0431\u0443\u044e\u0442 \u0434\u0440\u0443\u0433\u043e\u0439, \u0435\u0441\u043b\u0438 \u043d\u0435 \u043c\u043e\u0433\u0443\u0442 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0438\u0442\u044c\u0441\u044f)<\/li>\n<li>Administratoret d\u00ebshirojn\u00eb t\u00eb aplikojn\u00eb ndryshimet menj\u00ebher\u00eb, sepse \u00ebsht\u00eb m\u00eb e leht\u00eb t\u00eb planifikosh k\u00ebshtu.<\/li>\n<li>Administrator i serverit DNS ose i balancuesit t\u00eb ngarkes\u00ebs e sheh si detyr\u00eb e tij t\u00eb implementoj\u00eb n\u00eb m\u00ebnyr\u00eb efikase 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 ul\u00ebt ofrojn\u00eb qet\u00ebsi mendore.<\/li>\n<li>Njer\u00ebzit fillimisht vendosin TTL t\u00eb ul\u00ebt p\u00ebr testim dhe pastaj harrojn\u00eb t'i ndryshojn\u00eb ato.<\/li>\n<\/ul>\n<p>Nuk e kam p\u00ebrfshir\u00eb \"punimin e d\u00ebmtimit\", p\u00ebr shkak se kjo \u00ebsht\u00eb duke u b\u00ebr\u00eb gjithnj\u00eb e m\u00eb pak relevante. N\u00ebse \u00ebsht\u00eb e nevojshme t\u00eb ridrejtohen p\u00ebrdoruesit n\u00eb nj\u00eb rrjet tjet\u00ebr p\u00ebr t\u00eb shfaqur vet\u00ebm nj\u00eb faqe gabimi, kur gjith\u00e7ka tjet\u00ebr ka d\u00ebshtuar, ndoshta vonesa m\u00eb e madhe se 1 minut\u00eb \u00ebsht\u00eb e pranueshme.<\/p>\n<p>P\u00ebr m\u00eb tep\u00ebr, nj\u00eb TTL nj\u00ebminut\u00ebsh do t\u00eb thot\u00eb se n\u00ebse server\u00ebt autoritativ\u00eb DNS bllokohen p\u00ebr m\u00eb shum\u00eb se 1 minut\u00eb, askush tjet\u00ebr nuk do t\u00eb ket\u00eb qasje n\u00eb sh\u00ebrbimet e varura. Dhe tep\u00ebrzia nuk do t\u00eb ndihmoj\u00eb, n\u00ebse problemi \u00ebsht\u00eb nj\u00eb gabim konfigurimi apo nj\u00eb thyerje. Nga ana tjet\u00ebr, me TTL t\u00eb arsyesh\u00ebm, shum\u00eb klient\u00eb do t\u00eb vazhdojn\u00eb t\u00eb p\u00ebrdorin konfigurimin e m\u00ebparsh\u00ebm dhe kurr\u00eb nuk do t\u00eb v\u00ebrejn\u00eb ndonj\u00eb ndryshim.<\/p>\n<p>TTL t\u00eb ul\u00ebt jan\u00eb n\u00eb mas\u00eb t\u00eb madhe t\u00eb shkaqet nga sh\u00ebrbimet CDN dhe balancuesit e ngarkes\u00ebs, ve\u00e7an\u00ebrisht kur ato bashkojn\u00eb CNAME me TTL t\u00eb vogla dhe regjistrime me TTL t\u00eb tilla t\u00eb vogla (por t\u00eb pavarura):<\/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>Sa her\u00eb q\u00eb skadon CNAME ose ndonj\u00ebra 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 nuk p\u00ebrputhen. TTL real mesatar do t\u00eb jet\u00eb 15 sekonda.<\/p>\n<p>Por prisni! Gjith\u00e7ka \u00ebsht\u00eb akoma m\u00eb keq. Disa rezolvues veprojn\u00eb shum\u00eb keq n\u00eb k\u00ebt\u00eb situat\u00eb me dy TTL t\u00eb ulta 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 funksionon mbi BIND. N\u00ebse vazhdoni t\u00eb d\u00ebrgoni k\u00ebt\u00eb k\u00ebrkes\u00eb, do t\u00eb keni gjithmon\u00eb nj\u00eb TTL q\u00eb kthehet, i cili \u00ebsht\u00eb 1. N\u00eb thelb, <code>raw.githubusercontent.com<\/code> kurr\u00eb nuk cache-het.<\/p>\n<p>Ja nj\u00eb tjet\u00ebr shembull i till\u00eb me nj\u00eb domain 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. Nj\u00ebra ka nj\u00eb TTL t\u00eb arsyesh\u00ebm, por kjo \u00ebsht\u00eb krejt\u00ebsisht e panevojshme. N\u00eb CNAME-t\u00eb e tjera TTL fillestar \u00ebsht\u00eb 60 sekonda, por p\u00ebr domainet <code>akamai.net<\/code> TTL maksimale \u00ebsht\u00eb 20 sekonda, dhe asnj\u00ebra prej tyre nuk \u00ebsht\u00eb n\u00eb faz\u00eb.<\/p>\n<p>\u00c7far\u00eb ndodh me domainet q\u00eb kontrollojn\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>Problemi \u00ebsht\u00eb i nj\u00ebjt\u00eb me Firefox, dhe TTL p\u00ebrgjith\u00ebsisht mbetet n\u00eb 1 sekond\u00eb kur p\u00ebrdorim rezolverin 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>P\u00ebr regjistrimin <code>safebrowsing.googleapis.com<\/code> vlera TTL \u00ebsht\u00eb 60 sekonda, ashtu si p\u00ebr domainet e Facebook. Dhe, p\u00ebrs\u00ebri, nga perspektiva e klientit, k\u00ebto vlera reduktohen me gjysm\u00ebn.<\/p>\n<h1>\u00c7far\u00eb ndodh n\u00ebse vendosim nj\u00eb minimum TTL?<\/h1>\n<p>Duke emrin, llojin e k\u00ebrkes\u00ebs, TTL dhe mark\u00ebn e koh\u00ebs t\u00eb ruajtur fillimisht, un\u00eb shkrova nj\u00eb skript p\u00ebr t\u00eb simuluar 1,5 milion k\u00ebrkesa q\u00eb kalojn\u00eb p\u00ebrmes nj\u00eb zgjidh\u00ebsi t\u00eb ruajtur, p\u00ebr t\u00eb vler\u00ebsuar sasin\u00eb e k\u00ebrkesave t\u00eb tep\u00ebrta t\u00eb d\u00ebrguara p\u00ebr shkak t\u00eb skadimit t\u00eb regjistrimit n\u00eb cache.<\/p>\n<p>47,4% e k\u00ebrkesave u b\u00ebn\u00eb pasi skadoi regjistrimi ekzistues. Kjo \u00ebsht\u00eb jasht\u00ebzakonisht e lart\u00eb.<\/p>\n<p>Cili do t\u00eb ishte ndikimi n\u00eb caching n\u00ebse vendoset nj\u00eb TTL minimal?<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/3abd417d312450519b45f66865b23763.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Osi X p\u00ebrfaq\u00ebson vlerat minimale t\u00eb TTL. Regjistrimet me TTL fillestar mbi k\u00ebt\u00eb vler\u00eb nuk preken.<\/p>\n<p>Osi Y tregon p\u00ebrqindjen e k\u00ebrkesave nga klienti t\u00eb cilit i ka kaluar regjistrimi n\u00eb cache, por ka skaduar dhe ai b\u00ebn nj\u00eb k\u00ebrkes\u00eb t\u00eb re.<\/p>\n<p>Shp\u00ebrndarja e k\u00ebrkesave \"t\u00eb tep\u00ebrta\" zvog\u00eblohet nga 47% n\u00eb 36% thjesht duke vendosur nj\u00eb TTL minimal prej 5 minutash. Kur vendoset nj\u00eb TTL minimal prej 15 minutash, numri i k\u00ebtyre k\u00ebrkesave zvog\u00eblohet n\u00eb 29%. Nj\u00eb TTL minimal prej 1 ore i ul ata n\u00eb 17%. Nj\u00eb ndryshim i r\u00ebnd\u00ebsish\u00ebm!<\/p>\n<p>\u00c7far\u00eb n\u00ebse nuk ndryshojm\u00eb asgj\u00eb n\u00eb an\u00ebn e serverit, por vendosim nj\u00eb TTL minimal n\u00eb cache-at DNS t\u00eb klientit (ruter\u00eb, zgjidh\u00ebs lokal)?<\/p>\n<p><img decoding=\"async\" alt=\"Mjaft t\u00eb p\u00ebrdorni nj\u00eb TTL p\u00ebr DNS q\u00eb \u00ebsht\u00eb qesharake e vog\u00ebl\" src=\"\/wp-content\/uploads\/2019\/11\/107a2bd53797d421d65ac7260bf78dfe.jpg\" style=\"display:block;margin: 0 auto;\"><\/p>\n<p>Numri i k\u00ebrkesave t\u00eb nevojshme ulet nga 47% n\u00eb 34% me vendosjen e nj\u00eb TTL minimale prej 5 minutash, n\u00eb 25% me nj\u00eb minimum prej 15 minutash dhe n\u00eb 13% me nj\u00eb minimum prej 1 ore. Vlera optimale mund t\u00eb jet\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 sh\u00ebrbimeve n\u00eb cloud, nj\u00eb server t\u00eb ri, nj\u00eb rrjet t\u00eb ri, duke k\u00ebrkuar nga klient\u00ebt q\u00eb t\u00eb p\u00ebrdorin regjistrat m\u00eb t\u00eb fundit DNS. Dhe nj\u00eb TTL i ul\u00ebt ndihmon p\u00ebr t\u00eb realizuar nj\u00eb kalim t\u00eb till\u00eb pa probleme dhe n\u00eb heshtje. Por me kalimin n\u00eb infrastruktur\u00eb t\u00eb re, askush nuk pret q\u00eb klient\u00ebt t\u00eb b\u00ebjn\u00eb kalimin n\u00eb regjistrat e rinj DNS brenda 1 minute, 5 minutash ose 15 minutash. Vendosja e nj\u00eb kohe minimale jetese prej 40 minutash n\u00eb vend t\u00eb 5 minutash nuk do t\u2019i pengoj\u00eb p\u00ebrdoruesit t\u00eb ken\u00eb qasje n\u00eb sh\u00ebrbim.<\/p>\n<p>Megjithat\u00eb, kjo do t\u00eb lejoj\u00eb nj\u00eb reduktim t\u00eb konsideruesh\u00ebm t\u00eb vones\u00ebs dhe do t\u00eb rris\u00eb privat\u00ebsin\u00eb dhe besueshm\u00ebrin\u00eb, duke shmangur k\u00ebrkesat e panevojshme.<\/p>\n<p>Sigurisht, RFC thon\u00eb se duhet t\u00eb respektohet rrept\u00ebsisht TTL. Por realiteti \u00ebsht\u00eb se sistemi DNS ka b\u00ebr\u00eb shum\u00eb t\u00eb paefektsh\u00ebm.<\/p>\n<p>N\u00ebse punoni me server\u00eb autoritativ\u00eb DNS, ju lutemi kontrolloni TTL tuaj. Aju nevojiten v\u00ebrtet vlera kaq t\u00eb ul\u00ebta?<\/p>\n<p>Sigurisht, ka arsye t\u00eb forta p\u00ebr t\u00eb vendosur TTL t\u00eb ul\u00ebta p\u00ebr shenjat DNS. Por jo p\u00ebr 75% t\u00eb trafikut DNS, i cili pothuajse nuk ndryshon.<\/p>\n<p>Dhe n\u00ebse p\u00ebr ndonj\u00eb arsye ju nevojitet v\u00ebrtet t\u00eb p\u00ebrdorni TTL t\u00eb ul\u00ebt p\u00ebr DNS, sigurohuni gjithashtu q\u00eb n\u00eb faqen tuaj t\u00eb mos jet\u00eb aktivizuar caching. P\u00ebr t\u00eb nj\u00ebjtat arsye.<\/p>\n<p>N\u00ebse keni nj\u00eb cache lokal DNS, si <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dnscrypt\/dnscrypt-proxy\">dnscrypt-proxy<\/a><\/noindex>, i cili lejon vendosjen e TTL minimal, p\u00ebrdorni k\u00ebt\u00eb funksion. \u00ebsht\u00eb n\u00eb rregull. Nuk do t\u00eb ndodh\u00eb asgj\u00eb e keqe. Vendosni nj\u00eb TTL minimal midis 40 minutash (2400 sekonda) dhe 1 ore. Nj\u00eb gam\u00eb shum\u00eb t\u00eb 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 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" 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