{"id":1872,"date":"2021-04-20T20:22:00","date_gmt":"2021-04-20T17:22:00","guid":{"rendered":"https:\/\/www.niobehosting.com\/blog\/?p=1872"},"modified":"2021-05-03T15:29:15","modified_gmt":"2021-05-03T12:29:15","slug":"dns","status":"publish","type":"post","link":"https:\/\/www.niobehosting.com\/blog\/dns\/","title":{"rendered":"DNS Nedir, DNS Ayarlar\u0131 De\u011fi\u015ftirme Nas\u0131l Yap\u0131l\u0131r?"},"content":{"rendered":"\n<p>Bu yaz\u0131m\u0131z\u0131 okumay\u0131 bitirdi\u011finizde, internet d\u00fcnyas\u0131nda s\u0131k\u00e7a duyulan \u201cDNS\u201d terimini, DNS \u00e7al\u0131\u015fma mant\u0131\u011f\u0131n\u0131 tam anlam\u0131 ile kavram\u0131\u015f ve DNS\u2019e dair bir\u00e7ok alt terimin ne anlama geldi\u011fini \u00f6\u011frenmi\u015f olacaks\u0131n\u0131z. Daha evvel yay\u0131nlad\u0131\u011f\u0131m\u0131z yaz\u0131larda DNS konusuna k\u0131saca de\u011finmi\u015ftik. Bu yaz\u0131m\u0131zda ayr\u0131nt\u0131l\u0131 olarak anlataca\u011f\u0131z. Haz\u0131rsan\u0131z ba\u015fl\u0131yoruz \ud83d\ude42<\/p>\n\n\n\n<p>\u0130nternette bulunan her web sitesinin bir IP adresi vard\u0131r. Mesela, taray\u0131c\u0131daki adres \u00e7ubu\u011funa <strong>https:\/\/77.245.144.40<\/strong> yazman\u0131z halinde https:\/\/niobehosting.com sitesine gidersiniz. Bu IP adreslerini telefon numaras\u0131 gibi d\u00fc\u015f\u00fcnebilirsiniz. Her sitenin, hatta internete ba\u011flanan her modemin IP adresi, t\u0131pk\u0131 telefon numaras\u0131 gibi benzersizdir. <\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-niobe-hosting wp-block-embed-niobe-hosting is-provider-niobehosting\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"v4tz1Q4hLw\"><a href=\"https:\/\/www.niobehosting.com\/blog\/ip\/\">IP Nedir? IP Adresi Sorgulama<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;IP Nedir? IP Adresi Sorgulama&#8221; &#8212; Niobe Hosting\" src=\"https:\/\/www.niobehosting.com\/blog\/ip\/embed\/#?secret=v4tz1Q4hLw\" data-secret=\"v4tz1Q4hLw\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>Elbette IP adreslerini ak\u0131lda tutmak olduk\u00e7a zordur. E\u011fer DNS olmasa idi s\u0131kl\u0131kla girdi\u011finiz onlarca web sitesine ait IP adreslerini unutmamak i\u00e7in t\u0131pk\u0131 telefon defteri gibi bir yaz\u0131l\u0131ma ihtiya\u00e7 duyacakt\u0131n\u0131z. \u0130\u015fte DNS teknolojisi de tam burada devreye giriyor. <\/p>\n\n\n\n<p><strong>Kolay hat\u0131rlanan web sitesi adreslerini IP adresine \u00e7eviren teknoloji,&nbsp; \u201cDNS\u201d yani \u0130ngilizce ad\u0131 ile \u201cDomain Name System\u201d olarak ifade edilir.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"810\" height=\"456\" src=\"https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/dns-nedir-nasil-calisir.jpg\" alt=\"\" class=\"wp-image-1888\" srcset=\"https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/dns-nedir-nasil-calisir.jpg 810w, https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/dns-nedir-nasil-calisir-300x169.jpg 300w, https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/dns-nedir-nasil-calisir-768x432.jpg 768w, https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/dns-nedir-nasil-calisir-100x56.jpg 100w, https:\/\/www.niobehosting.com\/blog\/wp-content\/uploads\/dns-nedir-nasil-calisir-700x394.jpg 700w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>DNS Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/strong><\/h2>\n\n\n\n<p>DNS sunucular\u0131n \u00e7al\u0131\u015fma mant\u0131\u011f\u0131 son derece basittir. DNS\nsistemini \u201cisim sunucular\u0131\u201d ve \u201cisim \u00e7\u00f6z\u00fcmleyicileri\u201d (DNS istemcileri)\nolu\u015fturur. <strong>Bir DNS isim sunucusu,\nb\u00fcnyesinde bulunan her IP adresine kar\u015f\u0131l\u0131k gelen alan ad\u0131n\u0131 kaydeder. Siz web\ntaray\u0131c\u0131n\u0131za bir alan ad\u0131 yazd\u0131\u011f\u0131n\u0131zda ise DNS istemci taraf\u0131ndan ilgili DNS\nsunucusunun adresi istenir. E\u011fer DNS sunucusunda s\u00f6z konusu web sitesine ait\ndomain bir IP adresi ile ili\u015fkilendirildi ise, o siteyi ziyaret etmek\nm\u00fcmk\u00fcnd\u00fcr. <\/strong><\/p>\n\n\n\n<p>Genelde \u201cBerkeley Internet Name Domain\u201d isimli \u201cBIND\u201d k\u0131sa\nad\u0131 ile bilinen yaz\u0131l\u0131m\u0131 kullanan DNS teknolojisi; yukar\u0131daki paragrafta\nanlatt\u0131\u011f\u0131m\u0131z senaryoyu bu veya muadili yaz\u0131l\u0131mlar ile ger\u00e7ekle\u015ftirir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>DNS\u2019nin Kullan\u0131m\nAmac\u0131 Nedir?<\/strong><\/h2>\n\n\n\n<p>Asl\u0131nda bu konuyu daha giri\u015fte a\u00e7\u0131klam\u0131\u015ft\u0131k. Ama bu ba\u015fl\u0131k\nalt\u0131nda tekrar a\u00e7\u0131klamakta fayda g\u00f6r\u00fcyoruz. DNS\u2019in var olu\u015f amac\u0131 tamamen IP\nadreslerini ak\u0131lda tutman\u0131n zor olu\u015fudur. <\/p>\n\n\n\n<p>Bunun d\u0131\u015f\u0131nda <strong>internette markala\u015fma s\u00fcreci de DNS teknolojisinin kullan\u0131lmas\u0131 ile ba\u015flam\u0131\u015ft\u0131r. E\u011fer DNS olmasa idi, firmalar kendi marka adlar\u0131n\u0131n ge\u00e7ti\u011fi domain adreslerini kullanamayacak ve internette markala\u015fma \u00e7abas\u0131 imkans\u0131z hale gelecekti.<\/strong> Zira her g\u00fcn televizyonda reklamlar\u0131n\u0131 g\u00f6rd\u00fc\u011f\u00fcn\u00fcz b\u00fcy\u00fck firmalar\u0131n ka\u00e7\u0131na ait m\u00fc\u015fteri hizmetleri numaras\u0131n\u0131 ezbere biliyoruz? <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Neden DNS\nDe\u011fi\u015ftirilir?<\/strong><\/h2>\n\n\n\n<p>Asl\u0131nda DNS adresini de\u011fi\u015ftirmek istemenin temel sebebi; bir\nweb sitesini IP adresini de\u011fi\u015ftirmek istemektir. Fakat \u00f6zellikle \u00fclkemizde; BTK\nveya mahkemeler taraf\u0131ndan yasaklanan sitelere eri\u015fmek i\u00e7in de DNS de\u011fi\u015fikli\u011fi\nyap\u0131lmaktad\u0131r.<\/p>\n\n\n\n<p><strong>Bir siteye eri\u015fim\nengeli koyman\u0131n en kolay yolu DNS tabanl\u0131 engellemedir. T\u00fcrkiye\u2019de hizmet veren\nherhangi bir internet servis sa\u011flay\u0131c\u0131ya ait DNS kulland\u0131\u011f\u0131n\u0131zda, yasaklanan\nsiteye eri\u015fim sa\u011flamak i\u00e7in IP bilgisi talep etti\u011finiz zaman; bu talep\nkulland\u0131\u011f\u0131n\u0131z DNS sunucusu taraf\u0131ndan reddedilir ve s\u00f6z konusu IP adresi\nsizinle payla\u015f\u0131lmaz. Siz de \u201cbu ip adresini sizinle payla\u015fmak istemiyoruz\u201d\nmesaj\u0131 yerine, \u201cBu siteye xxxx karar ile eri\u015fim engeli konulmu\u015ftur\u201d mesaj\u0131\ng\u00f6r\u00fcrs\u00fcn\u00fcz.<\/strong> Asl\u0131nda g\u00f6rm\u00fc\u015f oldu\u011funuz sayfa, y\u00f6nlendirildi\u011finiz bir maske\nsayfadan ba\u015fka bir \u015fey de\u011fildir.<\/p>\n\n\n\n<p>Ayr\u0131ca internet ba\u011flant\u0131 h\u0131z\u0131n\u0131zdan memnun de\u011filseniz veya\nolas\u0131 siber sald\u0131r\u0131lardan korunmak istiyorsan\u0131z (Cloudflare benzeri hizmetler\nkullanmak \u015fart\u0131 ile) DNS de\u011fi\u015ftirebilirsiniz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>DNS Ayarlar\u0131 Nas\u0131l De\u011fi\u015ftirilir?<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>Android \u0130\u015fletim Sisteminde DNS De\u011fi\u015ftirmek<\/strong><\/h3>\n\n\n\n<p>Android i\u015fletim sistemi kullanan mobil cihazlarda DNS\nde\u011fi\u015ftirmek olduk\u00e7a basittir. A\u015fa\u011f\u0131daki ad\u0131mlar\u0131 izleyerek telefon veya DNS ayarlar\u0131n\u0131\nde\u011fi\u015ftirebilirsiniz.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u201cAyarlar\u201d\nmen\u00fcs\u00fcne t\u0131klay\u0131n.<\/li><li>Ard\u0131ndan\n\u201cWi-Fi\u201d se\u00e7ene\u011fini t\u0131klay\u0131n.<\/li><li>\u201cKablosuz\u201d\nse\u00e7ene\u011fini se\u00e7in.<\/li><li>\u201cA\u011f\nAyarlar\u0131n\u0131 Y\u00f6net\u201d men\u00fcs\u00fcne t\u0131klay\u0131n.<\/li><li>\u201cGeli\u015fmi\u015f\nSe\u00e7enekleri G\u00f6ster\u201d se\u00e7ene\u011fini se\u00e7in.<\/li><li>\u201cIP\nAyarlar\u0131 = Statik\u201d men\u00fcs\u00fcnden DNS kay\u0131tlar\u0131n\u0131 istedi\u011finiz gibi d\u00fczenleyin.<\/li><\/ol>\n\n\n\n<p>T\u00fcm bunlarla u\u011fra\u015fmak istemiyorsan\u0131z, Google Play Store\u2019a\nba\u011flanarak <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.burakgon.dnschanger&amp;hl=en_US\">BU<\/a>\nuygulamay\u0131 indirebilirsiniz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>IOS \u0130\u015fletim Sisteminde DNS De\u011fi\u015ftirmek<\/strong><\/h3>\n\n\n\n<p>IOS i\u015fletim sistemini kullanan iPhone telefonlarda DNS\nde\u011fi\u015ftirmek de t\u0131pk\u0131 Andorid telefonlarda oldu\u011fu gibi \u00e7ok basittir. A\u015fa\u011f\u0131daki\nad\u0131mlar\u0131 uygulaman\u0131z halinde iPhone marka telefonunuzun DNS ayarlar\u0131n\u0131 2\ndakikadan daha k\u0131sa s\u00fcrede de\u011fi\u015ftirebilirsiniz.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>iPhone \u201cAyarlar\u201d men\u00fcs\u00fcne girin.<\/li><li>\u201cWi-Fi\u201d se\u00e7ene\u011fini bulun ve t\u0131klay\u0131n.<\/li><li>Ba\u011fl\u0131 oldu\u011funuz Wi-Fi a\u011f\u0131na t\u0131klay\u0131n.<\/li><li>Ba\u011fl\u0131 oldu\u011funuz Wi-Fi a\u011f\u0131n\u0131n yan\u0131nda mavi renkte olan \u201ci\u201d yani \u201cinfo\u201d yaz\u0131s\u0131na dokunun.<\/li><li>A\u00e7\u0131lan men\u00fcde \u201cDNS\u201d b\u00f6l\u00fcm\u00fcne t\u0131klay\u0131n ve bu alan\u0131 istedi\u011finiz DNS adresini yazarak d\u00fczenleyin.<\/li><li>Sol \u00fcst k\u0131s\u0131mda bulunan ve sol tarafa do\u011fru ok i\u015fareti g\u00f6steren \u201cWi-Fi\u201d yaz\u0131s\u0131na t\u0131klayarak men\u00fcden \u00e7\u0131kt\u0131\u011f\u0131n\u0131zda, DNS kay\u0131tlar\u0131n\u0131 d\u00fczenlemi\u015f olacaks\u0131n\u0131z. <\/li><\/ol>\n\n\n\n<p>T\u00fcm bunlarla u\u011fra\u015fmak istemiyorsan\u0131z, IOS i\u00e7in Cloudflare destekli DNS Changer\u2019\u0131 App Store&#8217;dan indirebilirsiniz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>Windows \u0130\u015fletim Sisteminde DNS De\u011fi\u015ftirmek<\/strong><\/h3>\n\n\n\n<p>Windows i\u015fletim sistemi kullanan masa\u00fcst\u00fc\nbilgisayarlar\u0131n\u0131zda da DNS de\u011fi\u015ftirmek m\u00fcmk\u00fcnd\u00fcr. Bunun i\u00e7in a\u015fa\u011f\u0131daki ad\u0131mlar\u0131\nizlemeniz yeterlidir.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u201cA\u011f\nve Payla\u015f\u0131m Merkezi\u201d b\u00f6l\u00fcm\u00fcne gidin.<\/li><li>\u201cBa\u011fda\u015ft\u0131r\u0131c\u0131\nAyarlar\u0131n\u0131 De\u011fi\u015ftirin\u201d se\u00e7ene\u011fini se\u00e7in.<\/li><li>\u201cEthernet\n\u00d6zellik Ayarlar\u0131\u201d k\u0131sm\u0131na t\u0131klay\u0131n.<\/li><li>\u201c\u0130nternet\nProtokol\u00fc S\u00fcr\u00fcm 4\u201d b\u00f6l\u00fcm\u00fcnden DNS kay\u0131tlar\u0131n\u0131z\u0131 istedi\u011finiz gibi de\u011fi\u015ftirin.<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>DNS Zone Dosyalar\u0131 ve\nKay\u0131t Tipleri<\/strong><\/h2>\n\n\n\n<p>\u201cDNS alan\u0131\u201d olarak T\u00fcrk\u00e7ele\u015ftirebilece\u011fimiz \u201cDNS Zone\u201d\n\u00fczerinde \u00e7e\u015fitli dosyalar ve kay\u0131t tipleri bulunmaktad\u0131r. Bunlar a\u015fa\u011f\u0131daki\ngibidir:<\/p>\n\n\n\n<p><strong>named.boot:<\/strong> DNS\n\u00e7al\u0131\u015fmaya ba\u015flad\u0131\u011f\u0131 esnada program taraf\u0131ndan okunan ilk dosya; .boot uzant\u0131l\u0131\n\u201cnamed\u201d dosyas\u0131d\u0131r. Ayn\u0131 zamanda bir yap\u0131land\u0131rma dosyas\u0131 olan named.boot;\n\u201c\/etc \u201c dizini alt\u0131nda bulunur. namaed.boot; DNS Zone\u2019da bulunan di\u011fer\nyap\u0131land\u0131rma dosyalar\u0131na nas\u0131l ula\u015f\u0131laca\u011f\u0131n\u0131 s\u00f6yler. <\/p>\n\n\n\n<p><strong>named.local:<\/strong> DNS\nsunucusunun bulundu\u011fu makineye ait adresi tespit etmeye yarayan kullan\u0131lan bir\ndosyad\u0131r. S\u00f6z konusu makinenin adresi \u201cloopback\u201d ismi ile adland\u0131r\u0131lmaktad\u0131r.<\/p>\n\n\n\n<p><strong>named.ca:<\/strong> Bu\ndosya ise \u201croot server (.)\u201d ismi verilen (en \u00fcst seviyedeki makineler)\nmakinelerin adreslerini bar\u0131nd\u0131rmaktad\u0131r.<\/p>\n\n\n\n<p><strong>named.hosts:<\/strong> Bu\ndosya \u201cikincil alan ad\u0131\u201d ya da DNS \u00e7al\u0131\u015ft\u0131ran ikincil alandaki makinelere ait\nadreslerinin&nbsp; bulundu\u011fu dosyad\u0131r. Yani\ngitti\u011finiz nihai DNS sunucusunda \u00e7al\u0131\u015fan t\u00fcm bilgisayar adresleri bu dosyada\nbulunur.<\/p>\n\n\n\n<p><strong>named.reserve:<\/strong>\nYap\u0131 olarak \u201cnamed.local\u201d dosyas\u0131na benzeyen .reserve uzant\u0131l\u0131 bu dosya en\nbasitle\u015ftirilmi\u015f anlat\u0131m ile; gitmek istedi\u011finiz sitenin IP adresini, domain ad\u0131na\n\u00e7evirir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>DNS Tarih\u00e7esi<\/strong><\/h2>\n\n\n\n<p>Asl\u0131nda DNS teknolojisinin icat edilmesinin mazisi \u00e7ok da\neski de\u011fildir. <strong>1984 y\u0131l\u0131na kadar internete\nba\u011flanmak isteyen bilgisayarlar; IP adreslerini isimlere d\u00f6n\u00fc\u015ft\u00fcrebilmek i\u00e7in\n\u201cHOSTS\u201d isimli bir metin dosyas\u0131 kullan\u0131yordu. Web sitelerini bar\u0131nd\u0131ran\nbilgisayar isimleri ve IP adresleri bu dosyaya manuel olarak kaydedilmekte idi.\n\u0130nternete ba\u011flanmak isteyen her bilgisayarda da bu dosyan\u0131n bir kopyas\u0131n\u0131n var\nolmas\u0131 gerekirdi.<\/strong> O tarihlerde bir web adresine gitmek istedi\u011finizde bu dosya\ntaran\u0131yor ve dosya i\u00e7erisinde ilgili web adresi bir IP ile e\u015fle\u015ftirilmi\u015f ise o\nadrese gitmek m\u00fcmk\u00fcn oluyordu.<\/p>\n\n\n\n<p>Elbette sistemin sa\u011fl\u0131kl\u0131 \u00e7al\u0131\u015fmas\u0131 i\u00e7in HOSTS dosyas\u0131n\u0131n\ns\u00fcrekli g\u00fcncel ve eri\u015filebilir olmas\u0131 gerekliydi. <strong>HOSTS doyas\u0131n\u0131n asl\u0131; Amerika Birle\u015fik Devletleri\u2019ndeki Standford\n\u00dcniversitesi\u2019ndeki bir bilgisayarda saklan\u0131yordu ve internetteki bilgisayarlar\nperiyodik zamanlarda bu bilgisayara ba\u011flanarak dosyan\u0131n g\u00fcncel halini\nindiriyordu.<\/strong> Elbette bu kal\u0131c\u0131 bir \u00e7\u00f6z\u00fcm olamazd\u0131. Zira <strong>internet kullanan bilgisayarlar\u0131n artmas\u0131\nile HOSTS dosyas\u0131 fevkalade b\u00fcy\u00fck boyutlara ula\u015ft\u0131. Ayr\u0131ca dosyan\u0131n asl\u0131n\u0131n\ntutuldu\u011fu bilgisayarda artan ba\u011flant\u0131 say\u0131s\u0131na cevap veremeyerek, indirme\ni\u015flemini olanaks\u0131z hale getirdi.<\/strong><\/p>\n\n\n\n<p><strong>Kay\u0131tlar\u0131n el ile\ngirildi\u011fi HOSTS dosyas\u0131n\u0131n di\u011fer bir dezavantaj\u0131 ise bilgisayarlar\u0131n\nisimlendirilmesi idi.<\/strong> \u00c7\u00fcnk\u00fc, verilen her ismin benzersiz olmas\u0131 gerekirdi\nve insanlar taraf\u0131ndan manuel olarak yap\u0131lan isimlendirme i\u015flemleri hatal\u0131\nolabiliyordu. <strong>Ayn\u0131 ad\u0131n yanl\u0131\u015fl\u0131kla birden\nfazla bilgisayara verilmi\u015f olmas\u0131 durumunda, ismi ayn\u0131 olan bilgisayarlara\neri\u015fim sa\u011flanam\u0131yordu.<\/strong><\/p>\n\n\n\n<p>\u0130\u015fte t\u00fcm bu problemlerden m\u00fctevellit; internet teknolojisi\ngeli\u015ftiricileri DNS teknolojisini icat ettiler. Bilgisayara ait bilgilerin\nsakland\u0131\u011f\u0131 veri tabanlar\u0131n\u0131 hiyerar\u015fik bir d\u00fczene sokan DNS teknolojisi\nsayesinde; bilgilerin tutuldu\u011fu veri tabanlar\u0131 farkl\u0131 co\u011frafi noktalarda\nsaklanabilir hale geldi.<\/p>\n\n\n\n<p>Yukar\u0131daki paragraf\u0131 a\u00e7\u0131klamak gerekirse; Almanya\u2019da bulunan\nbilgisayarlara ait liste i\u00e7in .de domaini belirlenmi\u015ftir. Almanya\u2019daki t\u00fcm\nbilgisayarlardan sorumlu olan bir ana makine taraf\u0131ndan, bu lokasyondaki t\u00fcm\nalt makinelerin bir listesi tutulmaktad\u0131r. Dolay\u0131s\u0131 ile co\u011frafi bazl\u0131 bir liste\ntutma y\u00f6ntemi oldu\u011fundan hem eri\u015fim daha h\u0131zl\u0131 olmakta, hem de d\u00fcnyadaki t\u00fcm\nmakinelerin bilgileri tek bir merkezde tutulmamaktad\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Yayg\u0131n DNS Sunucu\nYaz\u0131l\u0131mlar\u0131<\/strong><\/h2>\n\n\n\n<p>Daha evvelde a\u00e7\u0131klad\u0131\u011f\u0131m\u0131z \u00fczere <strong>en yayg\u0131n DNS Sunucu yaz\u0131l\u0131m\u0131; \u201cBerkeley Internet Name Domain\u201d isimli\n\u201cBIND\u201d k\u0131saltmas\u0131na sahip yaz\u0131l\u0131md\u0131r.<\/strong> Bu yaz\u0131l\u0131m, t\u00fcm DNS Sunucu\nyaz\u0131l\u0131mlar\u0131n\u0131n atas\u0131d\u0131r. <strong>Bu yaz\u0131l\u0131ma\nalternatif olarak PowerDNS ve Microsoft DNS Servisi gibi yaz\u0131l\u0131mlar ve\nplatformlar kullan\u0131labilir. <\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>DNS Sunucusu Nedir?<\/strong><\/h2>\n\n\n\n<p>\u00c7ok k\u0131sa \u015fekilde tan\u0131mlamak gerekirse; <strong>DNS Zone\u2019lar\u0131n yay\u0131n yapt\u0131\u011f\u0131 basit sunuculara DNS sunucular\u0131 denir.<\/strong><\/p>\n\n\n\n<p>DNS Sunucu yaz\u0131l\u0131mlar\u0131 olduk\u00e7a basit bir mant\u0131kla\n\u00e7al\u0131\u015ft\u0131klar\u0131 ve i\u015fledikleri veri az miktarda oldu\u011fu i\u00e7in; \u00e7ok y\u00fcksek \u00f6zellikli\nsunuculara ihtiya\u00e7 duymazlar. Dolay\u0131s\u0131 ile \u00e7al\u0131\u015ft\u0131klar\u0131 sunucunun CPU g\u00fcc\u00fcn\u00fcn\ny\u00fcksek olmas\u0131 gerekmez. En basit sunucuda dahi on binlerce farkl\u0131 DNS Zone\nsa\u011fl\u0131k bir \u015fekilde \u00e7al\u0131\u015fabilmektedir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>DNS Recursion (\u00d6z Yineleyici)<\/strong><\/h2>\n\n\n\n<p>Asl\u0131nda <strong>bu\nteknolojinin kullan\u0131lma amac\u0131 daha h\u0131zl\u0131 ve daha iyi bir ziyaret\u00e7i deneyimi\nya\u015fatmakt\u0131r.<\/strong> DNS istemcisi taraf\u0131ndan istenilen bir iste\u011fi, DNS sunucusu\nyerine getiremez ise, iste\u011fin yerine getirilebilece\u011fi di\u011fer sunucular\u0131 da\ndenetlemek gerekebilir. Bu a\u00e7\u0131klamadan anla\u015f\u0131laca\u011f\u0131 \u00fczere asl\u0131nda teknolojinin\nvar olma amac\u0131; hedef web sitesine daha kolay eri\u015fim sa\u011flamakt\u0131r. Asl\u0131nda\nteknoloji o denli g\u00fczel tasarlanm\u0131\u015ft\u0131r ki hedef siteyi kesin bulmak i\u00e7in Root\nDNS sunucusundan bile faydalanabilmektir.<\/p>\n\n\n\n<p><strong>Genelde bir sunucunun\n\u00d6zyinelemeli isteklere kapat\u0131lmas\u0131 tavsiye edilir. <\/strong>Bu tavsiyenin\nhakl\u0131l\u0131\u011f\u0131n\u0131n alt\u0131n\u0131 \u00e7izmek i\u00e7in \u201cDNS Recursion\u201d yani \u201c\u00f6zyineleme\u201d kavram\u0131n\u0131\nbiraz a\u00e7mam\u0131z gerekmektedir.<\/p>\n\n\n\n<p>Genelde sunuculara sald\u0131rma ama\u00e7l\u0131 kullan\u0131lan bu y\u00f6ntemde\nsald\u0131rgan; sahte IP adresleri ve sorgu istekleri ile DNS sunucular\u0131n\u0131z\u0131 s\u00fcrekli\nme\u015fgul ederler. Sunucunuzda sonsuz d\u00f6ng\u00fc ile gelen bu isteklere s\u00fcrekli cevap\nverilmek istenece\u011finden dolay\u0131; siteniz ger\u00e7ek ziyaret\u00e7ilerin eri\u015fimine yan\u0131t\nveremeyebilir. \u201cAmplifikat\u00f6r sald\u0131r\u0131s\u0131\u201d olarak da bilinen bu sald\u0131r\u0131ya maruz\nkalan sitelerin ve bar\u0131nd\u0131klar\u0131 sunucular\u0131n kara listeye girmesi olas\u0131d\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Root Ad Sunucusu<\/strong><\/h2>\n\n\n\n<p>DNS teknolojisini hiyerar\u015fik bir yap\u0131da anlatmak gerekir\nise; en \u00fcst seviyede bulunan sunucuya \u201cRoot Ad Sunucusu\u201d ya da \u201cRoot DNS\nSunucusu\u201d ad\u0131 verilir. Asl\u0131nda bu sunucuya di\u011fer sunucular gibi bir isim\nverilmez. <\/p>\n\n\n\n<p>Root Ad Suncusu bir k\u0131lavuzdur. Gelen \u00f6zyineli isteklerin\nbulunamamas\u0131 halinde; TLD Ad Sunucular\u0131na gitmelerini s\u00f6yler.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>TLD Ad Sunucusu<\/strong><\/h2>\n\n\n\n<p>.com, .net, .org gibi \u00fcst seviye alan adlar\u0131na ait server\nbilgilerini saklayan sunuculara \u201cTLD Ad Sunucusu\u201d ad\u0131 verilir. T\u00fcm b\u00f6lgesel\nolmayan \u00fcst seviye alan adlar\u0131 TLD Ad Sunucusu kullan\u0131r.<\/p>\n\n\n\n<p>Bir TLD Ad Sunucusuna gelen istek; \u201cYetkili Ad Sunucusu\u201d\n(Yetkili DNS Sunucusu) taraf\u0131na iletilir. Asl\u0131nda \u00fcst seviye alan ad\u0131na ait t\u00fcm\nIP bilgileri bu sunucunun veri tabanlar\u0131nda bulunur.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Bir Alan Ad\u0131 \u0130\u00e7in DNS\nAyarlar\u0131 Nas\u0131l De\u011fi\u015ftirilir?<\/strong><\/h2>\n\n\n\n<p>Hosting panelinde bulunan \u201cDNS Zone Editor\u201d veya \u201cDNS Alan\nEdit\u00f6r\u00fc\u201d b\u00f6l\u00fcm\u00fcne giderek, alan ad\u0131n\u0131za ait DNS ayarlar\u0131n\u0131 de\u011fi\u015ftirebilirsiniz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>DNS Kay\u0131t Tipleri<\/strong><\/h3>\n\n\n\n<p>Yukar\u0131da bahsedilen DNS alan edit\u00f6r\u00fc i\u00e7erisinde a\u015fa\u011f\u0131daki\nk\u0131s\u0131mlar\u0131 yani \u201cDNS Kay\u0131t Tipleri\u201d d\u00fczenlenebilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A Kayd\u0131<\/strong><\/h3>\n\n\n\n<p>Bir domain adresinin bir IP adresi ile ili\u015fkilendirilmesi\ni\u00e7in kullan\u0131lan temel DNS kay\u0131t t\u00fcr\u00fcd\u00fcr. Yaln\u0131zca IPv4 adreslerini i\u015faret\nederler.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>CNAME Kayd\u0131<\/strong><\/h3>\n\n\n\n<p>CNAME kayd\u0131 \u201cAlias Kayd\u0131\u201d olarak da isimlendirilir. Bu kayd\u0131\nkullanman\u0131z i\u00e7in mutlaka do\u011fru bir \u201cA Kayd\u0131\u201d yapm\u0131\u015f olman\u0131z gerekmektedir.\nSubdomain adreslerinizi farkl\u0131 bir IP adresine y\u00f6nlendirmek i\u00e7in CNAME kayd\u0131\nalan\u0131n\u0131 d\u00fczenlemeniz yeterlidir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>MX Kayd\u0131<\/strong><\/h3>\n\n\n\n<p>Mail trafi\u011finiz ile alakal\u0131 bilgileri i\u015fleyebilece\u011finiz alan\n\u201cMX kay\u0131tlar\u0131\u201d veya \u201cMail Kay\u0131tlar\u0131\u201d olarak ifade edilir. Bu alana e-posta\nsunucular\u0131n\u0131z\u0131n adreslerini girebilir ve \u00f6ncelik s\u0131ras\u0131 belirtebilirsiniz.<\/p>\n\n\n\n<p>Bu alanda \u201cPriority\u201d isimli bir de\u011fer vard\u0131r ve bu de\u011fer\n\u00f6ncelikli e-posta sunucusu belirlemenize imkan verir. Bir alan ad\u0131 i\u00e7in birden\nfazla MX kayd\u0131 tan\u0131mlanabilir. E\u011fer domaininize tan\u0131ml\u0131 birden fazla MX kayd\u0131\nvar ise, e-postalar\u0131n\u0131z \u00f6nce Priority de\u011feri bak\u0131m\u0131ndan en d\u00fc\u015f\u00fck olan sunucuya\niletilir. Bu sunucunun yo\u011fun olmas\u0131, kapal\u0131 olmas\u0131 gibi sebeplerle cevap\nvermemesi durumunda ise s\u0131radaki en d\u00fc\u015f\u00fck priority de\u011ferine sahip sunucu ile\nileti\u015fime ge\u00e7ilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DNS <strong>TXT Kayd\u0131<\/strong><\/h3>\n\n\n\n<p>\u00c7ok s\u0131k kullan\u0131lmayan bir kay\u0131t t\u00fcr\u00fcd\u00fcr. \u201cSender Policy\nFramework\u201d adl\u0131 \u201cSPF\u201d kay\u0131tlar\u0131 burada tutulur. SPF\u2019nin kullan\u0131m amac\u0131 ise;\nsahte mail adresleri arac\u0131l\u0131\u011f\u0131 ile g\u00f6nderilen e-postalar\u0131n engellenmesini\nsa\u011flamakt\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>AAA Kayd\u0131<\/strong><\/h3>\n\n\n\n<p>Asl\u0131na bakarsan\u0131z \u201cA Kayd\u0131\u201d ile bire bir ayn\u0131 i\u015flemi yapan\nbir kay\u0131t t\u00fcr\u00fcd\u00fcr. Tek fark\u0131 IPv6 kayd\u0131n\u0131 domain ad\u0131 ile e\u015fle\u015ftirmesidir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>NS Kayd\u0131<\/strong><\/h3>\n\n\n\n<p>\u201cName Server\u201d kelimesinin k\u0131saltmas\u0131ndan olu\u015fan bir kay\u0131t\nbi\u00e7imidir. Ayn\u0131 network \u00fczerinde bulunan DNS sunucular\u0131n\u0131n birbiri ile h\u0131zl\u0131\nbir \u015fekilde haberdar olmas\u0131 bu kay\u0131t ile sa\u011flan\u0131r. Ayr\u0131ca NS kay\u0131tlar\u0131\nsayesinde alan ad\u0131n\u0131z i\u00e7in ge\u00e7erli sunucunun ismini de belirlersiniz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>SRV Kayd\u0131<\/strong><\/h3>\n\n\n\n<p>\u0130ngilizce \u201cSRV Record\u201d kelimesinden dilimize \u00e7evrilmi\u015f olan\nbu kay\u0131t tipidir. Sunucularda bulunan her \u00f6zel hizmetin; adres (lokasyon), port\nve protokol bilgileri bulunmaktad\u0131r. Bu bilgiler SRV kayd\u0131 i\u00e7inde\ntutulmaktad\u0131r. Herhangi bir istemci taraf\u0131ndan bu bilgiler istendi\u011finde, ilgili\nbilginin sa\u011flanmas\u0131 SRV kayd\u0131 kontrol edilerek yap\u0131lmaktad\u0131r. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Open DNS Nedir?<\/strong><\/h2>\n\n\n\n<p>Esas\u0131nda Open DNS; Amerika Birle\u015fik Devletleri\u2019nin San\nFransisco eyaletinde hizmet veren bir teknoloji firmas\u0131d\u0131r. Verdi\u011fi hizmet\nasl\u0131nda; daha h\u0131zl\u0131 ve \u00e7evrimi\u00e7i gizlili\u011fi sa\u011flanm\u0131\u015f internet deneyimi\nsunmaktan ibarettir. &nbsp;Open DNS taraf\u0131ndan\nsunulan proxy hizmeti ile daha h\u0131zl\u0131 bir internet deneyimi ya\u015farken, yasakl\u0131\nsitelere de eri\u015fim sa\u011flayabilirsiniz.<\/p>\n\n\n\n<p><strong>\u00dclkemizde 2014 y\u0131l\u0131\nba\u015flar\u0131nda Google DNS adreslerinin \u00e7al\u0131\u015fmamas\u0131ndan dolay\u0131 olduk\u00e7a pop\u00fcler hale\ngelmi\u015ftir. Birincil (tercih edilen) DNS sunucusu alan\u0131na \u201c208.67.222.222\u201d,\nikincil (di\u011fer) DNS sunucusu alan\u0131na \u201c208.67.220.220\u201d de\u011ferleri yaz\u0131larak Open\nDNS\u2019ten istifade edilebilir.<\/strong><\/p>\n\n\n\n<p>Open DNS\u2019in son kullan\u0131c\u0131ya sundu\u011fu hizmetlerin bir k\u0131sm\u0131 \u00fccretsizdir. Open DNS ile ev a\u011f\u0131n\u0131zda bulunan cihazlar\u0131n internet eri\u015fimini kontrol alman\u0131z ve istedi\u011finiz sitelere eri\u015fim engeli koyman\u0131z m\u00fcmk\u00fcnd\u00fcr.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Reverse DNS Nedir?<\/strong><\/h2>\n\n\n\n<p><strong>As\u0131l ad\u0131 \u201cRDNS\u201d olan\nve \u0130ngilizce \u201cReverse Domain Name System\u201d \u015feklinde ifade edilen teknolojinin\npiyasadaki ismi \u201cReverse DNS\u201d olarak ge\u00e7mektedir. Ayn\u0131 zamanda \u201cPTR Kayd\u0131\u201d ismi\nile de bilinir.<\/strong><\/p>\n\n\n\n<p>Bu kadar \u00e7ok ad ile var olan Reverse DNS asl\u0131nda A kayd\u0131n\u0131n\ntam tersi i\u015flemi yapar. Hat\u0131rlayaca\u011f\u0131n\u0131z \u00fczere A kayd\u0131, domain adresinizi bir\nIP adresi ile e\u015flemekte idi. Reverse DNS ise bir IP adresini bir ip adresi ile\ne\u015flemektedir. \u00dcstelik A kayd\u0131 ve PTR kayd\u0131, birbirinden ba\u011f\u0131ms\u0131z olarak \u00e7al\u0131\u015fmaktad\u0131r.\nYani ayn\u0131 IP adresi A kayd\u0131nda farkl\u0131 bir domaine, RDNS kayd\u0131nda farkl\u0131 bir\ndomaine e\u015flenebilir.<\/p>\n\n\n\n<p>RDNS kay\u0131tlar\u0131 en \u00e7ok e-posta al\u0131\u015fveri\u015fleri esnas\u0131nda\nkullan\u0131l\u0131r. Size bir e-posta geldi\u011finde RDNS kontrol edilir ve e-postay\u0131\ng\u00f6nderen hesab\u0131n asl\u0131nda hangi makinada oldu\u011fu tespit edilir. E\u011fer RDNS\nkayd\u0131n\u0131z yoksa; Gmail, Yahoo, Yandex, Hotmail gibi lider e-posta sa\u011flay\u0131c\u0131\nfirmalar\u0131n hesaplar\u0131na elektronik posta yollayamazs\u0131n\u0131z.<\/p>\n\n\n\n<p>RDNS kayd\u0131 i\u00e7in s\u0131radan bir hosting panelinde d\u00fczenleme\nyapama imkan\u0131 bulunmamaktad\u0131r. Asl\u0131nda bir sunucu DNS servisi sa\u011fl\u0131yor ise\nmant\u0131k olarak \u201cDNS Zone\u201d \u00fczerinden bu kayd\u0131n d\u00fczenlenmesi gerekir. Fakat&nbsp; ISP firmalar\u0131 ve hosting sa\u011flay\u0131c\u0131lar, bu\nkayd\u0131 sadece kendileri d\u00fczenlemeyi tercih etmektedir.<\/p>\n\n\n\n<p>Sitenize ait bir PTR kayd\u0131 olup olmad\u0131\u011f\u0131n\u0131 <a href=\"https:\/\/mxtoolbox.com\/ReverseLookup.aspx\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">BURADAK\u0130<\/a> arac\u0131 kullanarak \u00e7evrimi\u00e7i olarak kontrol edebilirsiniz. Sitede g\u00f6r\u00fcnt\u00fcleyece\u011finiz kutucu\u011fa IP adresi yazman\u0131z gerekmektedir.<\/p>\n\n\n\n<p>Yaz\u0131m\u0131z\u0131n burada sonuna geldik. DNS hakk\u0131nda \u00f6\u011frenmeniz\ngereken bir\u00e7ok bilgiye ula\u015ft\u0131n\u0131z. Verilen bilgilerin \u00e7ok fazla teknik detay\ni\u00e7ermesinden dolay\u0131 bu sayfay\u0131 tekrar ziyaret etmek isteyebilirsiniz. Bu\nsebeple sayfay\u0131 s\u0131k kullan\u0131lanlara eklemenizi tavsiye ederiz. Web teknolojileri\nile ilgili \u00f6\u011frenmeniz gereken her konuya blogumuz \u00fczerinden ula\u015fabilirsiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bu yaz\u0131m\u0131z\u0131 okumay\u0131 bitirdi\u011finizde, internet d\u00fcnyas\u0131nda s\u0131k\u00e7a duyulan \u201cDNS\u201d terimini, DNS \u00e7al\u0131\u015fma mant\u0131\u011f\u0131n\u0131 tam anlam\u0131 ile kavram\u0131\u015f ve DNS\u2019e dair bir\u00e7ok alt terimin ne anlama&#8230;<\/p>\n","protected":false},"author":8,"featured_media":1889,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1872","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-domain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DNS Nedir, Nas\u0131l \u00c7al\u0131\u015f\u0131r? DNS Ayarlar\u0131 De\u011fi\u015ftirme Nas\u0131l Yap\u0131l\u0131r? - Niobe Hosting<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.niobehosting.com\/blog\/dns\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DNS Nedir, Nas\u0131l \u00c7al\u0131\u015f\u0131r? 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