{"id":5513,"date":"2024-01-04T07:44:43","date_gmt":"2024-01-04T04:44:43","guid":{"rendered":"https:\/\/www.daha.net\/?post_type=blog&#038;p=5513"},"modified":"2026-06-30T23:50:31","modified_gmt":"2026-06-30T20:50:31","slug":"dns-nedir-ne-ise-yarar-nasil-degistirilir","status":"publish","type":"post","link":"https:\/\/www.daha.net\/blog\/dns-nedir-ne-ise-yarar-nasil-degistirilir\/","title":{"rendered":"DNS Nedir? Ne \u0130\u015fe Yarar? Nas\u0131l De\u011fi\u015ftirilir?"},"content":{"rendered":"\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>\u0130\u00e7indekiler<\/h2><ul><li><a href=\"\/blog\/#h-dns-nasil-calisir\" data-level=\"2\">DNS Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/a><\/li><li><a href=\"\/blog\/#h-dns-degisimi-neden-gerekebilir\" data-level=\"2\">DNS De\u011fi\u015fimi Neden Gerekebilir?<\/a><\/li><li><a href=\"\/blog\/#h-dns-nasil-degistirilir\" data-level=\"2\">DNS Nas\u0131l De\u011fi\u015ftirilir?<\/a><\/li><li><a href=\"\/blog\/#h-dns-ve-guvenlik-iliskisi\" data-level=\"2\">DNS ve G\u00fcvenlik \u0130li\u015fkisi<\/a><\/li><\/ul><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">DNS (Domain Name System), internetin temel yap\u0131 ta\u015flar\u0131ndan biridir ve dijital d\u00fcnyada cihazlar\u0131n birbirini bulmas\u0131n\u0131 sa\u011flar. \u0130nsanlar\u0131n kolayca hat\u0131rlayabilece\u011fi alan adlar\u0131n\u0131 (\u00f6rne\u011fin, daha.net) makinelerin ileti\u015fim kurdu\u011fu IP adreslerine (\u00f6rne\u011fin, 192.168.1.1) \u00e7eviren bir sistemdir. Bu \u00e7eviri i\u015flemi, web sitelerine eri\u015fimden e-posta g\u00f6ndermeye kadar bir\u00e7ok \u00e7evrimi\u00e7i etkinli\u011fi m\u00fcmk\u00fcn k\u0131lar. DNS olmadan, her web sitesine ula\u015fmak i\u00e7in uzun ve karma\u015f\u0131k say\u0131 dizilerini ezberlemek zorunda kal\u0131n\u0131rd\u0131. Bu sistem, internet deneyimini hem h\u0131zl\u0131 hem de kullan\u0131c\u0131 dostu hale getirmektedir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DNS\u2019nin i\u015fleyi\u015fi, bir telefon rehberine benzetilebilir. Bir alan ad\u0131 yaz\u0131ld\u0131\u011f\u0131nda, DNS sunucular\u0131 bu ad\u0131 bir IP adresine y\u00f6nlendirir ve b\u00f6ylece taray\u0131c\u0131 do\u011fru sunucuya ba\u011flan\u0131r. Ayr\u0131ca, DNS yaln\u0131zca web siteleri i\u00e7in de\u011fil, ayn\u0131 zamanda di\u011fer internet servisleri i\u00e7in de kritik bir rol oynar. G\u00fcvenlik, h\u0131z ve eri\u015fim kolayl\u0131\u011f\u0131 a\u00e7\u0131s\u0131ndan modern internetin vazge\u00e7ilmez bir par\u00e7as\u0131d\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-dns-nasil-calisir\">DNS Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNS\u2019nin \u00e7al\u0131\u015fma mekanizmas\u0131, birka\u00e7 temel ad\u0131mdan olu\u015fur. Bir insan taray\u0131c\u0131ya bir alan ad\u0131 (\u00f6rne\u011fin, daha.net) yazd\u0131\u011f\u0131nda, bu istek \u00f6nce yerel bir DNS \u00e7\u00f6z\u00fcmleyicisine gider. \u00c7\u00f6z\u00fcmleyici, bu alan ad\u0131n\u0131n IP adresini bulmak i\u00e7in bir dizi sorgu ger\u00e7ekle\u015ftirir. \u0130lk olarak, k\u00f6k sunuculara (root servers) ula\u015f\u0131l\u0131r; bunlar, \u00fcst d\u00fczey alan adlar\u0131n\u0131 (TLD\u2019ler, \u00f6rne\u011fin .com, .net) y\u00f6neten sunuculara y\u00f6nlendirme yapar. Ard\u0131ndan, TLD sunucular\u0131, ilgili alan ad\u0131n\u0131n yetkili DNS sunucusuna i\u015faret eder. Son olarak, yetkili sunucu IP adresini d\u00f6nd\u00fcr\u00fcr ve ba\u011flant\u0131 kurulur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu s\u00fcre\u00e7 genellikle saniyeler i\u00e7inde tamamlan\u0131r ve insanlar i\u00e7in tamamen arka planda ger\u00e7ekle\u015fir. \u00d6nbellekleme (caching) sayesinde, daha \u00f6nce ziyaret edilen sitelerin IP adresleri yerel olarak saklanabilir; bu da sonraki eri\u015fimlerde h\u0131z\u0131 art\u0131r\u0131r. DNS\u2019nin bu h\u0131zl\u0131 ve d\u00fczenli i\u015fleyi\u015fi, internetin kesintisiz bir \u015fekilde kullan\u0131lmas\u0131n\u0131 sa\u011flamaktad\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-dns-degisimi-neden-gerekebilir\">DNS De\u011fi\u015fimi Neden Gerekebilir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNS sunucular\u0131n\u0131 de\u011fi\u015ftirmek, farkl\u0131 ihtiya\u00e7lar do\u011frultusunda tercih edilebilir. \u0130nternet servis sa\u011flay\u0131c\u0131lar\u0131 (ISS) taraf\u0131ndan varsay\u0131lan olarak atanan DNS sunucular\u0131 her zaman en h\u0131zl\u0131 veya en g\u00fcvenli se\u00e7enek olmayabilir. \u00d6rne\u011fin, baz\u0131 ISS\u2019ler DNS sorgular\u0131n\u0131 izleyebilir ya da belirli sitelere eri\u015fimi k\u0131s\u0131tlayabilir. Bu durumda, insanlar daha h\u0131zl\u0131, g\u00fcvenli veya sans\u00fcrs\u00fcz bir internet deneyimi i\u00e7in alternatif DNS sunucular\u0131na y\u00f6nelebilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ayr\u0131ca, baz\u0131 DNS sa\u011flay\u0131c\u0131lar\u0131 ek \u00f6zellikler sunar. Google Public DNS h\u0131z odakl\u0131d\u0131r ve 8.8.8.8 adresiyle bilinir; Cloudflare ise 1.1.1.1 adresiyle hem h\u0131z hem de gizlilik sunar. G\u00fcvenlik a\u00e7\u0131s\u0131ndan, k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131mlara kar\u015f\u0131 koruma sa\u011flayan DNS hizmetleri de mevcuttur. DNS de\u011fi\u015ftirme, bu avantajlardan yararlanmak isteyenler i\u00e7in basit bir \u00e7\u00f6z\u00fcm sunmaktad\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-dns-nasil-degistirilir\">DNS Nas\u0131l De\u011fi\u015ftirilir?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNS de\u011fi\u015ftirmek, teknik bilgi gerektirmeyen bir i\u015flemdir ve birka\u00e7 ad\u0131mda tamamlanabilir. Windows i\u015fletim sisteminde, insanlar \u015fu ad\u0131mlar\u0131 izleyebilir: Denetim Masas\u0131\u2019na gidilir, \u201cA\u011f ve Payla\u015f\u0131m Merkezi\u201d se\u00e7ilir, ard\u0131ndan aktif a\u011f ba\u011flant\u0131s\u0131na t\u0131klan\u0131r. \u201c\u00d6zellikler\u201d b\u00f6l\u00fcm\u00fcnden \u201c\u0130nternet Protokol\u00fc S\u00fcr\u00fcm 4 (TCP\/IPv4)\u201d se\u00e7ilip \u201cA\u015fa\u011f\u0131daki DNS sunucu adreslerini kullan\u201d kutucu\u011funa istenen adresler (\u00f6rne\u011fin, 8.8.8.8 ve 8.8.4.4) girilir. De\u011fi\u015fiklikler kaydedildi\u011finde yeni DNS aktif hale gelir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MacOS\u2019ta ise Sistem Ayarlar\u0131\u2019ndan \u201cA\u011f\u201d b\u00f6l\u00fcm\u00fcne girilir, aktif ba\u011flant\u0131 se\u00e7ilir ve \u201cGeli\u015fmi\u015f\u201d sekmesinden DNS sekmesine ge\u00e7ilir. Burada \u201c+\u201d tu\u015fuyla yeni DNS adresleri eklenir. Mobil cihazlarda da benzer bir s\u00fcre\u00e7 izlenir; genellikle \u201cWi-Fi Ayarlar\u0131\u201dndan DNS manuel olarak girilebilir. \u0130\u015flem tamamland\u0131ktan sonra, internet ba\u011flant\u0131s\u0131 yeni DNS sunucular\u0131n\u0131 kullanmaya ba\u015flar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-dns-ve-guvenlik-iliskisi\">DNS ve G\u00fcvenlik \u0130li\u015fkisi<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DNS, internet g\u00fcvenli\u011finde de \u00f6nemli bir rol oynar. K\u00f6t\u00fc ama\u00e7l\u0131 sitelere y\u00f6nlendirme (DNS spoofing) gibi tehditler, yanl\u0131\u015f DNS sunucular\u0131 kullan\u0131ld\u0131\u011f\u0131nda ortaya \u00e7\u0131kabilir. Bu t\u00fcr sald\u0131r\u0131lar, insanlar\u0131 sahte web sitelerine y\u00f6nlendirerek ki\u015fisel bilgilerini \u00e7almay\u0131 hedefler. G\u00fcvenilir ve \u015fifreli DNS hizmetleri (\u00f6rne\u011fin, DNS over HTTPS) bu riskleri azalt\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ayr\u0131ca, ebeveyn denetimleri veya i\u00e7erik filtreleme gibi ek g\u00fcvenlik katmanlar\u0131 sunan DNS sa\u011flay\u0131c\u0131lar\u0131 da vard\u0131r. \u00d6rne\u011fin, OpenDNS gibi hizmetler, zararl\u0131 i\u00e7erikleri engellemek i\u00e7in \u00f6zelle\u015ftirilebilir ayarlar sunar. \u0130nsanlar, ihtiya\u00e7lar\u0131na uygun bir DNS se\u00e7erek hem performans hem de g\u00fcvenlik a\u00e7\u0131s\u0131ndan daha iyi bir deneyim elde edebilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DNS, internetin g\u00f6r\u00fcnmez kahramanlar\u0131ndan biridir ve dijital d\u00fcnyada ba\u011flant\u0131lar\u0131n sorunsuz ger\u00e7ekle\u015fmesini sa\u011flar. Gerekti\u011finde DNS sunucular\u0131n\u0131 de\u011fi\u015ftirmek, h\u0131z, g\u00fcvenlik ve eri\u015fim \u00f6zg\u00fcrl\u00fc\u011f\u00fc gibi konularda fark yaratabilir. Herkesin interneti daha verimli kullanabilmesi i\u00e7in bu sistemin temel i\u015fleyi\u015fini anlamas\u0131 ve gerekti\u011finde ayarlamalar yapabilmesi \u00f6nemlidir.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DNS (Domain Name System), internetin temel yap\u0131 ta\u015flar\u0131ndan biridir ve dijital d\u00fcnyada cihazlar\u0131n birbirini bulmas\u0131n\u0131 sa\u011flar. \u0130nsanlar\u0131n kolayca hat\u0131rlayabilece\u011fi alan\u2026<\/p>\n","protected":false},"author":2,"featured_media":7660,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,5,2],"tags":[],"class_list":["post-5513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-domain","category-guvenlik","category-nedir-nasil-yapilir"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DNS Nedir? Ne \u0130\u015fe Yarar? Nas\u0131l De\u011fi\u015ftirilir? - daha.net Blog<\/title>\n<meta name=\"description\" content=\"Dns nedir, nas\u0131l \u00e7al\u0131\u015f\u0131r, nas\u0131l de\u011fi\u015ftirilir, avantajlar\u0131 ve etkileri nelerdir? Modem, bilgisayar ve mobil cihazlarda dns de\u011fi\u015fikli\u011fi.\" \/>\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.daha.net\/blog\/dns-nedir-ne-ise-yarar-nasil-degistirilir\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DNS Nedir? Ne \u0130\u015fe Yarar? Nas\u0131l De\u011fi\u015ftirilir? - daha.net Blog\" \/>\n<meta property=\"og:description\" content=\"Dns nedir, nas\u0131l \u00e7al\u0131\u015f\u0131r, nas\u0131l de\u011fi\u015ftirilir, avantajlar\u0131 ve etkileri nelerdir? 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