{"id":15765,"date":"2026-06-01T15:55:22","date_gmt":"2026-06-01T12:55:22","guid":{"rendered":"https:\/\/www.ihs.com.tr\/blog\/?p=15765"},"modified":"2026-06-01T15:55:22","modified_gmt":"2026-06-01T12:55:22","slug":"dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir","status":"publish","type":"post","link":"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/","title":{"rendered":"DNSSEC Nedir ve Domain G\u00fcvenli\u011finizi Nas\u0131l Bir \u00dcst Seviyeye Ta\u015f\u0131r?"},"content":{"rendered":"<p>\u0130nternet d\u00fcnyas\u0131nda her g\u00fcn milyarlarca kullan\u0131c\u0131, web sitelerine eri\u015fmek i\u00e7in alan adlar\u0131n\u0131 kullan\u0131r. Ancak bu basit i\u015flemin arkas\u0131nda, kullan\u0131c\u0131y\u0131 do\u011fru sunucuya y\u00f6nlendiren karma\u015f\u0131k bir sistem olan DNS (Domain Name System) yatar. Geleneksel haliyle DNS, g\u00fcvenlik do\u011frulamas\u0131 olmadan \u00e7al\u0131\u015ft\u0131\u011f\u0131 i\u00e7in siber sald\u0131r\u0131lara kar\u015f\u0131 savunmas\u0131zd\u0131r. \u0130\u015fte bu noktada DNSSEC (Domain Name System Security Extensions) devreye girerek, internetin bu temel ta\u015f\u0131n\u0131 dijital olarak imzalay\u0131p do\u011frular ve hem web sitesi sahipleri hem de son kullan\u0131c\u0131lar i\u00e7in \u00e7ok daha g\u00fcvenli bir dijital deneyim sunar. Bu teknoloji, kullan\u0131c\u0131lar\u0131n do\u011fru web sitesine ula\u015ft\u0131\u011f\u0131ndan emin olmalar\u0131n\u0131 sa\u011flayarak siber doland\u0131r\u0131c\u0131l\u0131k ve veri h\u0131rs\u0131zl\u0131\u011f\u0131 risklerini \u00f6nemli \u00f6l\u00e7\u00fcde azalt\u0131r.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_77 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0130\u00e7erik Tablosu<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a1daeef4ed5d\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\" id=\"ez-toc-cssicon-toggle-item-6a1daeef4ed5d\" aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSin-Temelleri-ve-Guvenlik-Aciklari\" >DNS&#8217;in Temelleri ve G\u00fcvenlik A\u00e7\u0131klar\u0131<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNS-Domain-Name-System-Nedir-ve-Nasil-Calisir\" >DNS (Domain Name System) Nedir ve Nas\u0131l \u00c7al\u0131\u015f\u0131r?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Geleneksel-DNS-Sorgularinin-Guvensiz-Yapisi\" >Geleneksel DNS Sorgular\u0131n\u0131n G\u00fcvensiz Yap\u0131s\u0131<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNS-Onbellek-Zehirlenmesi-Cache-Poisoning-Nedir\" >DNS \u00d6nbellek Zehirlenmesi (Cache Poisoning) Nedir?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNS-Spoofing-Sahtekarligi-Saldirilari-ve-Riskleri\" >DNS Spoofing (Sahtekarl\u0131\u011f\u0131) Sald\u0131r\u0131lar\u0131 ve Riskleri<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSECe-Giris-Dijital-Guven-Zinciri\" >DNSSEC&#8217;e Giri\u015f: Dijital G\u00fcven Zinciri<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSEC-Domain-Name-System-Security-Extensions-Nedir\" >DNSSEC (Domain Name System Security Extensions) Nedir?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSECin-Temel-Amaci-Veri-Butunlugu-ve-Kimlik-Dogrulama\" >DNSSEC&#8217;in Temel Amac\u0131: Veri B\u00fct\u00fcnl\u00fc\u011f\u00fc ve Kimlik Do\u011frulama<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Guven-Zinciri-Chain-of-Trust-Mantigi-Nasil-Isler\" >G\u00fcven Zinciri (Chain of Trust) Mant\u0131\u011f\u0131 Nas\u0131l \u0130\u015fler?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSECin-DNSe-Getirdigi-Temel-Farkliliklar\" >DNSSEC&#8217;in DNS&#8217;e Getirdi\u011fi Temel Farkl\u0131l\u0131klar<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSECin-Teknik-Calisma-Prensibi-ve-Bilesenleri\" >DNSSEC&#8217;in Teknik \u00c7al\u0131\u015fma Prensibi ve Bile\u015fenleri<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Dijital-Imzalar-ve-Kriptografik-Anahtarlarin-Rolu\" >Dijital \u0130mzalar ve Kriptografik Anahtarlar\u0131n Rol\u00fc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSEC-Tarafindan-Eklenen-Yeni-DNS-Kayit-Turleri\" >DNSSEC Taraf\u0131ndan Eklenen Yeni DNS Kay\u0131t T\u00fcrleri<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Bir-DNS-Sorgusunun-DNSSEC-ile-Adim-Adim-Dogrulanmasi\" >Bir DNS Sorgusunun DNSSEC ile Ad\u0131m Ad\u0131m Do\u011frulanmas\u0131<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSECin-Domain-Guvenliginize-Sagladigi-Avantajlar\" >DNSSEC&#8217;in Domain G\u00fcvenli\u011finize Sa\u011flad\u0131\u011f\u0131 Avantajlar<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Man-in-the-Middle-Ortadaki-Adam-Saldirilarina-Karsi-Etkin-Koruma\" >Man-in-the-Middle (Ortadaki Adam) Sald\u0131r\u0131lar\u0131na Kar\u015f\u0131 Etkin Koruma<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Kullanicilari-Sahte-ve-Zararli-Web-Sitelerinden-Koruma\" >Kullan\u0131c\u0131lar\u0131 Sahte ve Zararl\u0131 Web Sitelerinden Koruma<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#E-posta-Guvenliginin-Artirilmasi-DMARC-SPF-DKIM-Entegrasyonu\" >E-posta G\u00fcvenli\u011finin Art\u0131r\u0131lmas\u0131 (DMARC, SPF, DKIM Entegrasyonu)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Marka-Itibari-ve-Kullanici-Guveninin-Guclendirilmesi\" >Marka \u0130tibar\u0131 ve Kullan\u0131c\u0131 G\u00fcveninin G\u00fc\u00e7lendirilmesi<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSEC-Kurulumu-ve-Yonetimi\" >DNSSEC Kurulumu ve Y\u00f6netimi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Domain-Adiniz-Icin-DNSSEC-Nasil-Aktif-Edilir\" >Domain Ad\u0131n\u0131z \u0130\u00e7in DNSSEC Nas\u0131l Aktif Edilir?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Alan-Adi-Kayit-Firmasi-Registrar-ve-DNS-Saglayicisinin-Rolu\" >Alan Ad\u0131 Kay\u0131t Firmas\u0131 (Registrar) ve DNS Sa\u011flay\u0131c\u0131s\u0131n\u0131n Rol\u00fc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSEC-Kurulumunda-Dikkat-Edilmesi-Gerekenler\" >DNSSEC Kurulumunda Dikkat Edilmesi Gerekenler<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Anahtar-Yonetimi-Key-Rollover-ve-Sureklilik\" >Anahtar Y\u00f6netimi (Key Rollover) ve S\u00fcreklilik<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSEC-ve-Sikca-Sorulan-Sorular\" >DNSSEC ve S\u0131k\u00e7a Sorulan Sorular<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSEC-Sitemi-Yavaslatir-mi\" >DNSSEC Sitemi Yava\u015flat\u0131r m\u0131?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Her-Domain-Uzantisi-DNSSEC-Destekliyor-mu\" >Her Domain Uzant\u0131s\u0131 DNSSEC Destekliyor mu?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSEC-SSLTLS-Sertifikasinin-Yerini-Alir-mi\" >DNSSEC, SSL\/TLS Sertifikas\u0131n\u0131n Yerini Al\u0131r m\u0131?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSECin-Dezavantajlari-Var-mi\" >DNSSEC&#8217;in Dezavantajlar\u0131 Var m\u0131?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#DNSSEC-ve-Domain-Guvenligi-Icin-Neden-IHS-Telekomu-Tercih-Etmelisiniz\" >DNSSEC ve Domain G\u00fcvenli\u011fi \u0130\u00e7in Neden \u0130HS Telekom&#8217;u Tercih Etmelisiniz?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Tek-Tikla-Kolay-DNSSEC-Aktivasyonu\" >Tek T\u0131kla Kolay DNSSEC Aktivasyonu<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Uzman-Teknik-Destek-ve-Danismanlik-Hizmetleri\" >Uzman Teknik Destek ve Dan\u0131\u015fmanl\u0131k Hizmetleri<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Yuksek-Performansli-ve-Guvenilir-DNS-Altyapisi\" >Y\u00fcksek Performansl\u0131 ve G\u00fcvenilir DNS Altyap\u0131s\u0131<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/www.ihs.com.tr\/blog\/dnssec-nedir-ve-domain-guvenliginizi-nasil-bir-ust-seviyeye-tasir\/#Domain-Guvenliginiz-Icin-Sunulan-Diger-Ek-Hizmetler\" >Domain G\u00fcvenli\u011finiz \u0130\u00e7in Sunulan Di\u011fer Ek Hizmetler<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"DNSin-Temelleri-ve-Guvenlik-Aciklari\"><\/span>DNS&#8217;in Temelleri ve G\u00fcvenlik A\u00e7\u0131klar\u0131<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0130nternetin temel altyap\u0131s\u0131n\u0131 olu\u015fturan DNS, kullan\u0131c\u0131lar\u0131n web sitelerine kolayca eri\u015fmesini sa\u011flarken, do\u011fas\u0131 gere\u011fi baz\u0131 g\u00fcvenlik riskleri bar\u0131nd\u0131r\u0131r. Bu b\u00f6l\u00fcmde, DNS&#8217;in ne oldu\u011funu, nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 ve geleneksel yap\u0131s\u0131n\u0131n siber sald\u0131rganlar i\u00e7in neden bir hedef haline geldi\u011fini inceleyece\u011fiz. DNS&#8217;in zay\u0131f noktalar\u0131n\u0131 anlamak, DNSSEC gibi g\u00fcvenlik uzant\u0131lar\u0131n\u0131n neden hayati oldu\u011funu kavramak i\u00e7in ilk ad\u0131md\u0131r.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNS-Domain-Name-System-Nedir-ve-Nasil-Calisir\"><\/span>DNS (Domain Name System) Nedir ve Nas\u0131l \u00c7al\u0131\u015f\u0131r?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNS (Domain Name System), internetin telefon rehberi olarak d\u00fc\u015f\u00fcn\u00fclebilir. \u0130nsanlar\u0131n hat\u0131rlamas\u0131 kolay olan alan adlar\u0131n\u0131 (\u00f6rne\u011fin, www.ihs.com.tr) bilgisayarlar\u0131n anlad\u0131\u011f\u0131 say\u0131sal IP adreslerine (\u00f6rne\u011fin, 192.168.1.1) \u00e7evirir. Bir kullan\u0131c\u0131 taray\u0131c\u0131s\u0131na bir web adresi yazd\u0131\u011f\u0131nda, bu istek \u00f6nce bir DNS \u00e7\u00f6z\u00fcmleyiciye (resolver) gider. \u00c7\u00f6z\u00fcmleyici, bu alan ad\u0131n\u0131n hangi IP adresine kar\u015f\u0131l\u0131k geldi\u011fini bulmak i\u00e7in d\u00fcnya geneline yay\u0131lm\u0131\u015f DNS sunucular\u0131 hiyerar\u015fisinde bir sorgulama ba\u015flat\u0131r. K\u00f6k (root) sunuculardan ba\u015flayarak, \u00fcst d\u00fczey alan ad\u0131 (Top-Level Domain &#8211; TLD) sunucular\u0131na (.com, .net, .tr gibi) ve son olarak yetkili (authoritative) isim sunucusuna ula\u015f\u0131r. Yetkili sunucu, alan ad\u0131n\u0131n do\u011fru IP adresini i\u00e7eren kayd\u0131 \u00e7\u00f6z\u00fcmleyiciye g\u00f6nderir ve \u00e7\u00f6z\u00fcmleyici de bu bilgiyi kullan\u0131c\u0131n\u0131n bilgisayar\u0131na ileterek web sitesine ba\u011flant\u0131 kurulmas\u0131n\u0131 sa\u011flar.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Geleneksel-DNS-Sorgularinin-Guvensiz-Yapisi\"><\/span>Geleneksel DNS Sorgular\u0131n\u0131n G\u00fcvensiz Yap\u0131s\u0131<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Geleneksel DNS sorgular\u0131, en ba\u015f\u0131ndan beri h\u0131z ve verimlilik odakl\u0131 tasarlanm\u0131\u015ft\u0131r, ancak g\u00fcvenlik ikinci planda kalm\u0131\u015ft\u0131r. Bu sorgular genellikle \u015fifrelenmemi\u015f UDP (User Datagram Protocol) paketleri \u00fczerinden yap\u0131l\u0131r. Bu durum, sorgu ve cevap paketlerinin araya giren bir sald\u0131rgan taraf\u0131ndan kolayca okunabilece\u011fi, de\u011fi\u015ftirilebilece\u011fi veya taklit edilebilece\u011fi anlam\u0131na gelir. Geleneksel DNS&#8217;te, bir DNS \u00e7\u00f6z\u00fcmleyicisinin ald\u0131\u011f\u0131 cevab\u0131n ger\u00e7ekten do\u011fru ve yetkili sunucudan geldi\u011fini do\u011frulayacak standart bir mekanizma yoktur. Bu do\u011frulama eksikli\u011fi, sistemi DNS \u00f6nbellek zehirlenmesi ve DNS sahtekarl\u0131\u011f\u0131 gibi manip\u00fclasyonlara kar\u015f\u0131 son derece savunmas\u0131z b\u0131rak\u0131r.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNS-Onbellek-Zehirlenmesi-Cache-Poisoning-Nedir\"><\/span>DNS \u00d6nbellek Zehirlenmesi (Cache Poisoning) Nedir?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNS \u00d6nbellek Zehirlenmesi (Cache Poisoning), siber sald\u0131rganlar\u0131n bir DNS \u00e7\u00f6z\u00fcmleyicisinin \u00f6nbelle\u011fine sahte bilgiler enjekte etti\u011fi bir sald\u0131r\u0131 t\u00fcr\u00fcd\u00fcr. DNS \u00e7\u00f6z\u00fcmleyiciler, performans\u0131 art\u0131rmak i\u00e7in daha \u00f6nce yap\u0131lan sorgular\u0131n cevaplar\u0131n\u0131 belirli bir s\u00fcre boyunca \u00f6nbelleklerinde saklarlar. Sald\u0131rgan, bu mekanizmadan faydalanarak, me\u015fru bir alan ad\u0131 i\u00e7in sahte bir IP adresi i\u00e7eren bir yan\u0131t\u0131 \u00e7\u00f6z\u00fcmleyicinin \u00f6nbelle\u011fine yerle\u015ftirmeyi hedefler. E\u011fer ba\u015far\u0131l\u0131 olursa, o \u00e7\u00f6z\u00fcmleyiciyi kullanan t\u00fcm kullan\u0131c\u0131lar, ger\u00e7ek site yerine sald\u0131rgan\u0131n kontrol\u00fcndeki sahte veya zararl\u0131 bir siteye y\u00f6nlendirilir. Bu durum, kullan\u0131c\u0131lar\u0131n ki\u015fisel bilgilerini, parolalar\u0131n\u0131 veya finansal verilerini \u00e7ald\u0131rmak i\u00e7in kullan\u0131lan oltalama (phishing) sitelerine y\u00f6nlendirilmesine neden olabilir.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNS-Spoofing-Sahtekarligi-Saldirilari-ve-Riskleri\"><\/span>DNS Spoofing (Sahtekarl\u0131\u011f\u0131) Sald\u0131r\u0131lar\u0131 ve Riskleri<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNS Spoofing, genellikle DNS \u00f6nbellek zehirlenmesi ile birlikte an\u0131lan ancak daha geni\u015f bir kavram olan bir sald\u0131r\u0131 t\u00fcr\u00fcd\u00fcr. Sald\u0131rgan, kullan\u0131c\u0131n\u0131n DNS sorgusuna, ger\u00e7ek ve yetkili DNS sunucusundan \u00f6nce sahte bir yan\u0131t g\u00f6ndererek onu kand\u0131r\u0131r. Bu sahte yan\u0131t, kullan\u0131c\u0131y\u0131 orijinal web sitesi yerine tamamen ayn\u0131 g\u00f6r\u00fcn\u00fcme sahip k\u00f6t\u00fc ama\u00e7l\u0131 bir kopyas\u0131na y\u00f6nlendirir. Kullan\u0131c\u0131lar bu sahte siteye girdiklerinde, giri\u015f bilgileri, kredi kart\u0131 numaralar\u0131 gibi hassas verileri \u00e7al\u0131nabilir veya cihazlar\u0131na k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131mlar (malware) bula\u015ft\u0131r\u0131labilir. DNS Spoofing, kullan\u0131c\u0131lar\u0131n g\u00fcvendikleri bir alan ad\u0131na eri\u015fmeye \u00e7al\u0131\u015f\u0131rken bile siber doland\u0131r\u0131c\u0131l\u0131\u011f\u0131n kurban\u0131 olmalar\u0131na yol a\u00e7abilen ciddi bir g\u00fcvenlik riskidir.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DNSSECe-Giris-Dijital-Guven-Zinciri\"><\/span>DNSSEC&#8217;e Giri\u015f: Dijital G\u00fcven Zinciri<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Geleneksel DNS&#8217;in ta\u015f\u0131d\u0131\u011f\u0131 g\u00fcvenlik risklerine bir \u00e7\u00f6z\u00fcm olarak geli\u015ftirilen DNSSEC, internetin adres defterine dijital bir g\u00fcven katman\u0131 ekler. Bu b\u00f6l\u00fcmde, DNSSEC&#8217;in ne oldu\u011funu, temel amac\u0131n\u0131 ve internet altyap\u0131s\u0131n\u0131 nas\u0131l daha g\u00fcvenli hale getirdi\u011fini ke\u015ffedece\u011fiz. DNSSEC&#8217;in getirdi\u011fi &#8220;g\u00fcven zinciri&#8221; mant\u0131\u011f\u0131, DNS verilerinin do\u011frulu\u011funu ve b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc sa\u011flayarak siber sald\u0131r\u0131lara kar\u015f\u0131 g\u00fc\u00e7l\u00fc bir savunma hatt\u0131 olu\u015fturur.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNSSEC-Domain-Name-System-Security-Extensions-Nedir\"><\/span>DNSSEC (Domain Name System Security Extensions) Nedir?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC, &#8220;Domain Name System Security Extensions&#8221; (Alan Ad\u0131 Sistemi G\u00fcvenlik Uzant\u0131lar\u0131) ifadesinin k\u0131saltmas\u0131d\u0131r. ICANN (\u0130nternet Tahsisli Say\u0131lar ve \u0130simler Kurumu) taraf\u0131ndan geli\u015ftirilen bir teknolojidir ve DNS&#8217;e bir g\u00fcvenlik katman\u0131 ekler. Temel i\u015flevi, DNS verilerini \u015fifrelemek de\u011fil, verinin kayna\u011f\u0131n\u0131 do\u011frulamak (authentication) ve b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc (integrity) garanti etmektir. Bunu, DNS kay\u0131tlar\u0131n\u0131 dijital olarak imzalayarak yapar. Bu sayede, bir DNS \u00e7\u00f6z\u00fcmleyicisi ald\u0131\u011f\u0131 yan\u0131t\u0131n ger\u00e7ekten yetkili sunucudan geldi\u011fini ve transfer s\u0131ras\u0131nda de\u011fi\u015ftirilmedi\u011fini kriptografik olarak teyit edebilir. DNSSEC, kullan\u0131c\u0131lar\u0131 DNS sahtekarl\u0131\u011f\u0131 ve \u00f6nbellek zehirlenmesi gibi sald\u0131r\u0131lara kar\u015f\u0131 korur.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNSSECin-Temel-Amaci-Veri-Butunlugu-ve-Kimlik-Dogrulama\"><\/span>DNSSEC&#8217;in Temel Amac\u0131: Veri B\u00fct\u00fcnl\u00fc\u011f\u00fc ve Kimlik Do\u011frulama<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC&#8217;in iki temel amac\u0131 vard\u0131r. \u0130lki <b>Veri B\u00fct\u00fcnl\u00fc\u011f\u00fc (Data Integrity)<\/b> sa\u011flamakt\u0131r. Bu, bir DNS sorgusuna gelen yan\u0131t\u0131n, yetkili DNS sunucusundan \u00e7\u0131kt\u0131\u011f\u0131 andan itibaren herhangi bir de\u011fi\u015fikli\u011fe u\u011framad\u0131\u011f\u0131n\u0131 garanti eder. Dijital imzalar sayesinde, yan\u0131ttaki en ufak bir de\u011fi\u015fiklik bile do\u011frulama s\u00fcrecinde ortaya \u00e7\u0131kar. \u0130kinci ama\u00e7 ise <b>Kimlik Do\u011frulama (Origin Authentication)<\/b> sa\u011flamakt\u0131r. Bu da DNS yan\u0131t\u0131n\u0131n ger\u00e7ekten iddia etti\u011fi kaynaktan, yani alan ad\u0131n\u0131n yetkili sunucusundan geldi\u011fini kriptografik olarak kan\u0131tlar. Bu iki temel ama\u00e7, sald\u0131rganlar\u0131n DNS trafi\u011fine m\u00fcdahale ederek kullan\u0131c\u0131lar\u0131 sahte sitelere y\u00f6nlendirmesini engeller.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Guven-Zinciri-Chain-of-Trust-Mantigi-Nasil-Isler\"><\/span>G\u00fcven Zinciri (Chain of Trust) Mant\u0131\u011f\u0131 Nas\u0131l \u0130\u015fler?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC&#8217;in g\u00fcvenli\u011fi, &#8220;G\u00fcven Zinciri&#8221; (Chain of Trust) ad\u0131 verilen hiyerar\u015fik bir modele dayan\u0131r. Bu zincir, internetin en tepesindeki k\u00f6k (root) DNS b\u00f6lgesinden ba\u015flar. K\u00f6k b\u00f6lge, bir sonraki seviyedeki \u00fcst d\u00fczey alan ad\u0131 (TLD) sunucular\u0131n\u0131n (.com, .org, .tr gibi) anahtarlar\u0131n\u0131 imzalar. TLD sunucular\u0131 da kendi alt\u0131ndaki ikinci d\u00fczey alan adlar\u0131n\u0131n (\u00f6rne\u011fin, ihs.com.tr) anahtarlar\u0131n\u0131 imzalar. Bir DNS sorgusu yap\u0131ld\u0131\u011f\u0131nda, \u00e7\u00f6z\u00fcmleyici bu zinciri takip ederek her seviyedeki imzay\u0131 bir \u00fcst seviyedeki anahtarla do\u011frular. K\u00f6k b\u00f6lgenin anahtar\u0131 t\u00fcm \u00e7\u00f6z\u00fcmleyiciler taraf\u0131ndan bilindi\u011fi ve g\u00fcvenildi\u011fi i\u00e7in, zincirin en tepesinden ba\u015flayarak yap\u0131lan bu do\u011frulama, sorgulanan alan ad\u0131n\u0131n kayd\u0131n\u0131n me\u015fruiyetini ad\u0131m ad\u0131m kan\u0131tlar. Bu kesintisiz g\u00fcven zinciri, sistemin temelini olu\u015fturur.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNSSECin-DNSe-Getirdigi-Temel-Farkliliklar\"><\/span>DNSSEC&#8217;in DNS&#8217;e Getirdi\u011fi Temel Farkl\u0131l\u0131klar<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC, geleneksel DNS altyap\u0131s\u0131na \u00f6nemli ve kritik farklar getirir. Bu farklar, internetin adresleme sistemini \u00e7ok daha g\u00fcvenli hale getirir. Geleneksel DNS ve DNSSEC aras\u0131ndaki temel ayr\u0131mlar\u0131 anlamak, bu teknolojinin neden modern siber g\u00fcvenlik i\u00e7in vazge\u00e7ilmez oldu\u011funu ortaya koyar.<\/p>\n<div class=\"karsilastirma\">\n<table>\n<thead>\n<tr>\n<th>\u00d6zellik<\/th>\n<th>Geleneksel DNS<\/th>\n<th>DNSSEC<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><b>Veri Do\u011frulama<\/b><\/td>\n<td>Yoktur. Gelen yan\u0131t\u0131n do\u011frulu\u011fu varsay\u0131l\u0131r.<\/td>\n<td>Vard\u0131r. Dijital imzalar ile yan\u0131t\u0131n kayna\u011f\u0131 ve b\u00fct\u00fcnl\u00fc\u011f\u00fc do\u011frulan\u0131r.<\/td>\n<\/tr>\n<tr>\n<td><b>G\u00fcvenlik<\/b><\/td>\n<td>DNS Spoofing ve Cache Poisoning sald\u0131r\u0131lar\u0131na kar\u015f\u0131 savunmas\u0131zd\u0131r.<\/td>\n<td>Bu t\u00fcr sald\u0131r\u0131lara kar\u015f\u0131 etkin koruma sa\u011flar.<\/td>\n<\/tr>\n<tr>\n<td><b>DNS Kay\u0131tlar\u0131<\/b><\/td>\n<td>Standart kay\u0131t t\u00fcrlerini kullan\u0131r (A, CNAME, MX, vb.).<\/td>\n<td>G\u00fcvenlik i\u00e7in yeni kay\u0131t t\u00fcrleri ekler (RRSIG, DNSKEY, DS, NSEC3).<\/td>\n<\/tr>\n<tr>\n<td><b>Sorgu Yan\u0131t\u0131<\/b><\/td>\n<td>Sadece istenen kayd\u0131 i\u00e7erir.<\/td>\n<td>\u0130stenen kay\u0131tla birlikte onun dijital imzas\u0131n\u0131 da i\u00e7erir.<\/td>\n<\/tr>\n<tr>\n<td><b>Yokluk Kan\u0131t\u0131<\/b><\/td>\n<td>Bir kayd\u0131n var olmad\u0131\u011f\u0131n\u0131 g\u00fcvenilir bir \u015fekilde kan\u0131tlayamaz.<\/td>\n<td>NSEC\/NSEC3 kay\u0131tlar\u0131 ile bir kayd\u0131n mevcut olmad\u0131\u011f\u0131n\u0131 kriptografik olarak kan\u0131tlar.<\/td>\n<\/tr>\n<tr>\n<td><b>Karma\u015f\u0131kl\u0131k<\/b><\/td>\n<td>Yap\u0131land\u0131rmas\u0131 ve y\u00f6netimi basittir.<\/td>\n<td>Anahtar y\u00f6netimi ve yap\u0131land\u0131rmas\u0131 daha fazla teknik bilgi gerektirir.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"DNSSECin-Teknik-Calisma-Prensibi-ve-Bilesenleri\"><\/span>DNSSEC&#8217;in Teknik \u00c7al\u0131\u015fma Prensibi ve Bile\u015fenleri<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>DNSSEC&#8217;in g\u00fcvenli\u011fi, arka planda \u00e7al\u0131\u015fan karma\u015f\u0131k ancak son derece etkili kriptografik s\u00fcre\u00e7lere dayan\u0131r. Bu sistem, DNS&#8217;e eklenen yeni kay\u0131t t\u00fcrleri ve dijital imzalar arac\u0131l\u0131\u011f\u0131yla verilerin do\u011frulanmas\u0131n\u0131 sa\u011flar. Bu b\u00f6l\u00fcmde, DNSSEC&#8217;in teknik altyap\u0131s\u0131n\u0131, temel bile\u015fenlerini ve bir DNS sorgusunun bu teknoloji ile nas\u0131l ad\u0131m ad\u0131m do\u011fruland\u0131\u011f\u0131n\u0131 ayr\u0131nt\u0131l\u0131 bir \u015fekilde ele alaca\u011f\u0131z.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dijital-Imzalar-ve-Kriptografik-Anahtarlarin-Rolu\"><\/span>Dijital \u0130mzalar ve Kriptografik Anahtarlar\u0131n Rol\u00fc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC&#8217;in kalbinde a\u00e7\u0131k anahtarl\u0131 \u015fifreleme (public-key cryptography) prensibi yatar. Her DNS b\u00f6lgesi (zone) i\u00e7in iki t\u00fcr anahtar \u00e7ifti olu\u015fturulur: B\u00f6lge \u0130mzalama Anahtar\u0131 (Zone Signing Key &#8211; ZSK) ve Anahtar \u0130mzalama Anahtar\u0131 (Key Signing Key &#8211; KSK).<\/p>\n<ul>\n<li><b>ZSK (Zone Signing Key):<\/b> B\u00f6lgedeki t\u00fcm DNS kay\u0131t setlerini (A, MX, CNAME vb.) imzalamak i\u00e7in kullan\u0131l\u0131r. Bu imza, verinin b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc garanti eder.<\/li>\n<li><b>KSK (Key Signing Key):<\/b> Sadece DNSKEY kayd\u0131n\u0131, yani ZSK&#8217;n\u0131n da i\u00e7inde bulundu\u011fu a\u00e7\u0131k anahtar setini imzalamak i\u00e7in kullan\u0131l\u0131r. KSK, g\u00fcven zincirinin bir \u00fcst halkas\u0131yla ba\u011flant\u0131 kurmay\u0131 sa\u011flar.<\/li>\n<\/ul>\n<p>Bir DNS kayd\u0131 sorguland\u0131\u011f\u0131nda, yetkili sunucu hem kayd\u0131n kendisini hem de ZSK&#8217;n\u0131n \u00f6zel anahtar\u0131 ile olu\u015fturulmu\u015f dijital imzas\u0131n\u0131 (RRSIG kayd\u0131) g\u00f6nderir. \u00c7\u00f6z\u00fcmleyici, ZSK&#8217;n\u0131n a\u00e7\u0131k anahtar\u0131n\u0131 (DNSKEY kayd\u0131) kullanarak bu imzan\u0131n ge\u00e7erli olup olmad\u0131\u011f\u0131n\u0131 kontrol eder. B\u00f6ylece verinin de\u011fi\u015ftirilmedi\u011finden emin olur.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNSSEC-Tarafindan-Eklenen-Yeni-DNS-Kayit-Turleri\"><\/span>DNSSEC Taraf\u0131ndan Eklenen Yeni DNS Kay\u0131t T\u00fcrleri<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC&#8217;in \u00e7al\u0131\u015fabilmesi i\u00e7in standart DNS kay\u0131tlar\u0131na ek olarak baz\u0131 yeni kay\u0131t t\u00fcrleri tan\u0131mlanm\u0131\u015ft\u0131r. Bu kay\u0131tlar, imzalama, anahtar saklama ve do\u011frulama s\u00fcre\u00e7lerinin temelini olu\u015fturur.<\/p>\n<h4>RRSIG (Resource Record Signature)<\/h4>\n<p>RRSIG kayd\u0131, bir DNS kay\u0131t setinin (\u00f6rne\u011fin bir A kayd\u0131 veya MX kay\u0131tlar\u0131 seti) dijital imzas\u0131n\u0131 i\u00e7erir. Bir \u00e7\u00f6z\u00fcmleyici bir kay\u0131t istedi\u011finde, sunucu bu kayd\u0131n RRSIG&#8217;sini de g\u00f6nderir. \u00c7\u00f6z\u00fcmleyici, bu imzay\u0131 DNSKEY kayd\u0131ndaki a\u00e7\u0131k anahtar ile do\u011frulayarak verinin ge\u00e7erlili\u011fini kontrol eder.<\/p>\n<h4>DNSKEY (DNS Public Key)<\/h4>\n<p>DNSKEY kayd\u0131, bir DNS b\u00f6lgesi i\u00e7in kullan\u0131lan a\u00e7\u0131k kriptografik anahtarlar\u0131 (hem ZSK hem de KSK&#8217;n\u0131n a\u00e7\u0131k anahtar\u0131n\u0131) bar\u0131nd\u0131r\u0131r. Bu kay\u0131t, RRSIG imzalar\u0131n\u0131n do\u011frulanmas\u0131 i\u00e7in gereklidir. \u00c7\u00f6z\u00fcmleyici, bir imzan\u0131n do\u011frulu\u011funu teyit etmek i\u00e7in bu kay\u0131ttaki ilgili a\u00e7\u0131k anahtar\u0131 kullan\u0131r.<\/p>\n<h4>DS (Delegation Signer)<\/h4>\n<p>DS kayd\u0131, g\u00fcven zincirinin (Chain of Trust) en \u00f6nemli halkas\u0131d\u0131r. Bir alt b\u00f6lgenin (child zone, \u00f6rn: `ihs.com.tr`) KSK&#8217;s\u0131n\u0131n \u00f6zetini (hash) i\u00e7erir ve bu kay\u0131t, bir \u00fcst b\u00f6lgede (parent zone, \u00f6rn: `.com.tr`) saklan\u0131r. Bu sayede, \u00fcst b\u00f6lge, alt b\u00f6lgenin anahtarlar\u0131n\u0131n ge\u00e7erlili\u011fini tasdiklemi\u015f olur. Bir \u00e7\u00f6z\u00fcmleyici, alt b\u00f6lgenin DNSKEY kayd\u0131n\u0131 ald\u0131\u011f\u0131nda, bunun \u00f6zetini hesaplar ve \u00fcst b\u00f6lgeden ald\u0131\u011f\u0131 DS kayd\u0131 ile kar\u015f\u0131la\u015ft\u0131r\u0131r. E\u015fle\u015fme, g\u00fcven zincirinin k\u0131r\u0131lmad\u0131\u011f\u0131n\u0131 g\u00f6sterir.<\/p>\n<h4>NSEC ve NSEC3 (Next Secure)<\/h4>\n<p>Geleneksel DNS&#8217;te bir alan ad\u0131n\u0131n &#8220;var olmad\u0131\u011f\u0131n\u0131&#8221; g\u00fcvenli bir \u015fekilde kan\u0131tlamak m\u00fcmk\u00fcn de\u011fildi. DNSSEC bu sorunu NSEC ve NSEC3 kay\u0131tlar\u0131 ile \u00e7\u00f6zer. Bu kay\u0131tlar, bir b\u00f6lgedeki t\u00fcm alan adlar\u0131n\u0131 alfabetik olarak s\u0131ralay\u0131p birbirine ba\u011flar. Bir sorgu, var olmayan bir alan ad\u0131 i\u00e7in yap\u0131ld\u0131\u011f\u0131nda, sunucu o ismin hangi iki mevcut kay\u0131t aras\u0131nda yer almas\u0131 gerekti\u011fini g\u00f6steren bir NSEC\/NSEC3 kayd\u0131 d\u00f6nd\u00fcr\u00fcr. Bu, &#8220;yokluk kan\u0131t\u0131&#8221; (proof of non-existence) sa\u011flar. NSEC3, NSEC&#8217;in bir geli\u015ftirmesidir ve b\u00f6lgedeki t\u00fcm kay\u0131tlar\u0131n listelenmesini (zone walking) zorla\u015ft\u0131rmak i\u00e7in alan adlar\u0131n\u0131 hash&#8217;leyerek gizlili\u011fi art\u0131r\u0131r.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bir-DNS-Sorgusunun-DNSSEC-ile-Adim-Adim-Dogrulanmasi\"><\/span>Bir DNS Sorgusunun DNSSEC ile Ad\u0131m Ad\u0131m Do\u011frulanmas\u0131<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC destekli bir \u00e7\u00f6z\u00fcmleyicinin `www.ihs.com.tr` adresi i\u00e7in yapt\u0131\u011f\u0131 sorgu \u015fu ad\u0131mlar\u0131 izler:<\/p>\n<ol>\n<li><b>Sorgu Ba\u015flatma:<\/b> \u00c7\u00f6z\u00fcmleyici, k\u00f6k (root) sunuculara `www.ihs.com.tr` adresini sorar.<\/li>\n<li><b>K\u00f6k Sunucu Yan\u0131t\u0131:<\/b> K\u00f6k sunucular, `.tr` TLD sunucular\u0131n\u0131n adreslerini ve `.tr` b\u00f6lgesine ait DS kayd\u0131n\u0131 (KSK&#8217;n\u0131n \u00f6zeti) d\u00f6ner.<\/li>\n<li><b>TLD Sunucu Sorgusu ve Do\u011frulama:<\/b> \u00c7\u00f6z\u00fcmleyici, `.tr` sunucular\u0131na sorgu g\u00f6nderir. `.tr` sunucular\u0131, `com.tr` sunucular\u0131n\u0131n adreslerini, `com.tr` b\u00f6lgesinin DS kayd\u0131n\u0131 ve `.tr` b\u00f6lgesinin DNSKEY kayd\u0131n\u0131 ve imzas\u0131n\u0131 (RRSIG) d\u00f6ner. \u00c7\u00f6z\u00fcmleyici, k\u00f6kten ald\u0131\u011f\u0131 DS kayd\u0131 ile `.tr` sunucusundan ald\u0131\u011f\u0131 DNSKEY kayd\u0131n\u0131n e\u015fle\u015fti\u011fini do\u011frular.<\/li>\n<li><b>Yetkili Sunucu Sorgusu ve Do\u011frulama:<\/b> \u00c7\u00f6z\u00fcmleyici, `com.tr` sunucular\u0131na sorgu yapar. `com.tr` sunucular\u0131, `ihs.com.tr`&#8217;nin yetkili sunucular\u0131n\u0131, `ihs.com.tr` b\u00f6lgesinin DS kayd\u0131n\u0131, DNSKEY&#8217;ini ve RRSIG&#8217;sini d\u00f6ner. \u00c7\u00f6z\u00fcmleyici, `.tr`den ald\u0131\u011f\u0131 DS kayd\u0131 ile bu ad\u0131mda ald\u0131\u011f\u0131 DNSKEY&#8217;in e\u015fle\u015fti\u011fini do\u011frular.<\/li>\n<li><b>Son Kayd\u0131n Al\u0131nmas\u0131 ve Do\u011frulanmas\u0131:<\/b> \u00c7\u00f6z\u00fcmleyici, son olarak `ihs.com.tr`&#8217;nin yetkili sunucusuna `www` A kayd\u0131n\u0131 sorar. Sunucu, A kayd\u0131n\u0131 ve bu kayd\u0131n RRSIG imzas\u0131n\u0131 d\u00f6ner. \u00c7\u00f6z\u00fcmleyici, daha \u00f6nce ald\u0131\u011f\u0131 `ihs.com.tr` b\u00f6lgesinin DNSKEY kayd\u0131ndaki ZSK&#8217;n\u0131n a\u00e7\u0131k anahtar\u0131n\u0131 kullanarak bu son imzan\u0131n ge\u00e7erlili\u011fini de kontrol eder.<\/li>\n<\/ol>\n<p>T\u00fcm bu ad\u0131mlardaki imzalar ba\u015far\u0131l\u0131 bir \u015fekilde do\u011frulan\u0131rsa, \u00e7\u00f6z\u00fcmleyici IP adresinin g\u00fcvenli ve do\u011fru oldu\u011fundan emin olur ve kullan\u0131c\u0131y\u0131 siteye y\u00f6nlendirir. Herhangi bir ad\u0131mda do\u011frulama ba\u015far\u0131s\u0131z olursa, sorgu reddedilir ve kullan\u0131c\u0131 potansiyel bir sald\u0131r\u0131dan korunmu\u015f olur.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DNSSECin-Domain-Guvenliginize-Sagladigi-Avantajlar\"><\/span>DNSSEC&#8217;in Domain G\u00fcvenli\u011finize Sa\u011flad\u0131\u011f\u0131 Avantajlar<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>DNSSEC&#8217;i etkinle\u015ftirmek, sadece teknik bir y\u00fckseltme de\u011fil, ayn\u0131 zamanda dijital varl\u0131klar\u0131n\u0131z\u0131, kullan\u0131c\u0131lar\u0131n\u0131z\u0131 ve marka itibar\u0131n\u0131z\u0131 korumaya y\u00f6nelik proaktif bir ad\u0131md\u0131r. DNS&#8217;in temelindeki g\u00fcven bo\u015flu\u011funu doldurarak, modern siber tehditlere kar\u015f\u0131 kritik bir savunma katman\u0131 ekler. Bu b\u00f6l\u00fcmde, DNSSEC&#8217;in <a href=\"https:\/\/www.ihs.com.tr\/domain\/alan-adi-domain-tescili.html\" target=\"_blank\">domain<\/a> g\u00fcvenli\u011finize sa\u011flad\u0131\u011f\u0131 somut avantajlar\u0131 ve bu teknolojinin dijital ekosisteminizi nas\u0131l daha diren\u00e7li hale getirdi\u011fini inceleyece\u011fiz.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Man-in-the-Middle-Ortadaki-Adam-Saldirilarina-Karsi-Etkin-Koruma\"><\/span>Man-in-the-Middle (Ortadaki Adam) Sald\u0131r\u0131lar\u0131na Kar\u015f\u0131 Etkin Koruma<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Man-in-the-Middle (MitM) sald\u0131r\u0131lar\u0131, sald\u0131rgan\u0131n kullan\u0131c\u0131 ile web sunucusu aras\u0131ndaki ileti\u015fimin ortas\u0131na girerek verileri gizlice dinledi\u011fi veya de\u011fi\u015ftirdi\u011fi sald\u0131r\u0131 t\u00fcr\u00fcd\u00fcr. Geleneksel DNS, bu t\u00fcr sald\u0131r\u0131lara kar\u015f\u0131 savunmas\u0131zd\u0131r \u00e7\u00fcnk\u00fc bir sald\u0131rgan, DNS yan\u0131tlar\u0131n\u0131 manip\u00fcle ederek kullan\u0131c\u0131y\u0131 kendi kontrol\u00fcndeki bir sunucuya y\u00f6nlendirebilir. DNSSEC, her DNS yan\u0131t\u0131n\u0131 dijital olarak imzalayarak bu riski ortadan kald\u0131r\u0131r. Bir DNS yan\u0131t\u0131, hedefe ula\u015fmadan \u00f6nce de\u011fi\u015ftirilirse dijital imza ge\u00e7ersiz hale gelir. DNSSEC uyumlu \u00e7\u00f6z\u00fcmleyiciler bu ge\u00e7ersiz yan\u0131t\u0131 reddeder ve b\u00f6ylece kullan\u0131c\u0131n\u0131n sahte bir sunucuya ba\u011flanmas\u0131n\u0131 engelleyerek MitM sald\u0131r\u0131lar\u0131na kar\u015f\u0131 g\u00fc\u00e7l\u00fc bir kalkan olu\u015fturur.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Kullanicilari-Sahte-ve-Zararli-Web-Sitelerinden-Koruma\"><\/span>Kullan\u0131c\u0131lar\u0131 Sahte ve Zararl\u0131 Web Sitelerinden Koruma<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Siber su\u00e7lular\u0131n en yayg\u0131n taktiklerinden biri, banka, e-ticaret veya sosyal medya sitelerinin birebir kopyalar\u0131n\u0131 olu\u015fturarak kullan\u0131c\u0131lar\u0131n giri\u015f bilgilerini ve finansal verilerini \u00e7almakt\u0131r (phishing). DNS \u00f6nbellek zehirlenmesi veya spoofing yoluyla kullan\u0131c\u0131lar fark\u0131nda olmadan bu sahte sitelere y\u00f6nlendirilebilir. DNSSEC, bir alan ad\u0131n\u0131n her zaman do\u011fru IP adresine \u00e7\u00f6z\u00fcmlenmesini garanti eder. Kullan\u0131c\u0131 taray\u0131c\u0131s\u0131na do\u011fru adresi yazd\u0131\u011f\u0131nda, DNSSEC sayesinde ger\u00e7ekten gitmek istedi\u011fi sunucuya ula\u015ft\u0131\u011f\u0131ndan emin olabilir. Bu, kullan\u0131c\u0131lar\u0131 oltalama sald\u0131r\u0131lar\u0131ndan, k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m yayan sitelerden ve di\u011fer siber doland\u0131r\u0131c\u0131l\u0131k t\u00fcrlerinden korur.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"E-posta-Guvenliginin-Artirilmasi-DMARC-SPF-DKIM-Entegrasyonu\"><\/span>E-posta G\u00fcvenli\u011finin Art\u0131r\u0131lmas\u0131 (DMARC, SPF, DKIM Entegrasyonu)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Modern e-posta g\u00fcvenli\u011fi; <a href=\"https:\/\/www.ihs.com.tr\/blog\/spf-kaydi-nedir-ne-ise-yarar\/\" target=\"_blank\">SPF<\/a> (Sender Policy Framework), DKIM (DomainKeys Identified Mail) ve DMARC (Domain-based Message Authentication, Reporting, and Conformance) gibi DNS tabanl\u0131 teknolojilere dayan\u0131r. Bu teknolojiler, bir e-postan\u0131n ger\u00e7ekten belirtilen alan ad\u0131ndan g\u00f6nderilip g\u00f6nderilmedi\u011fini do\u011frulamak i\u00e7in DNS kay\u0131tlar\u0131n\u0131 kullan\u0131r. Ancak, e\u011fer DNS&#8217;in kendisi g\u00fcvensizse, bu kay\u0131tlar da sald\u0131rganlar taraf\u0131ndan manip\u00fcle edilebilir. DNSSEC, bu SPF, DKIM ve DMARC kay\u0131tlar\u0131n\u0131 da dijital olarak imzalayarak g\u00fcven alt\u0131na al\u0131r. Bu sayede, e-posta sahtekarl\u0131\u011f\u0131 (spoofing) ve oltalama giri\u015fimlerine kar\u015f\u0131 \u00e7ok daha g\u00fc\u00e7l\u00fc ve g\u00fcvenilir bir savunma mekanizmas\u0131 olu\u015fturulur.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Marka-Itibari-ve-Kullanici-Guveninin-Guclendirilmesi\"><\/span>Marka \u0130tibar\u0131 ve Kullan\u0131c\u0131 G\u00fcveninin G\u00fc\u00e7lendirilmesi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Dijital \u00e7a\u011fda marka itibar\u0131, b\u00fcy\u00fck \u00f6l\u00e7\u00fcde g\u00fcvenlik ve g\u00fcvenilirlik \u00fczerine kuruludur. Web sitenizin DNSSEC ile korunuyor olmas\u0131, m\u00fc\u015fterilerinize ve i\u015f ortaklar\u0131n\u0131za verilerinin g\u00fcvenli\u011fine \u00f6nem verdi\u011finizi g\u00f6steren g\u00fc\u00e7l\u00fc bir mesajd\u0131r. Bir g\u00fcvenlik ihlali, \u00f6zellikle de kullan\u0131c\u0131lar\u0131n sahte sitelere y\u00f6nlendirilmesi, marka imaj\u0131na onar\u0131lmas\u0131 zor zararlar verebilir. DNSSEC&#8217;i benimsemek, markan\u0131z\u0131 bu t\u00fcr olaylardan koruyarak proaktif bir g\u00fcvenlik duru\u015fu sergilemenizi sa\u011flar. Bu durum, \u00f6zellikle online i\u015flem yapan, hassas m\u00fc\u015fteri verileri toplayan veya y\u00fcksek profilli markalar i\u00e7in kullan\u0131c\u0131 g\u00fcvenini ve sadakatini art\u0131rmada kritik bir rol oynar.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DNSSEC-Kurulumu-ve-Yonetimi\"><\/span>DNSSEC Kurulumu ve Y\u00f6netimi<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>DNSSEC&#8217;in sa\u011flad\u0131\u011f\u0131 g\u00fcvenlik avantajlar\u0131ndan faydalanmak i\u00e7in do\u011fru kurulum ve s\u00fcrekli y\u00f6netim kritik \u00f6neme sahiptir. Bu s\u00fcre\u00e7, alan ad\u0131 kay\u0131t firman\u0131z (registrar) ile DNS servis sa\u011flay\u0131c\u0131n\u0131z aras\u0131nda koordinasyon gerektirir. Bu b\u00f6l\u00fcmde, bir domain i\u00e7in DNSSEC&#8217;in nas\u0131l aktif edilece\u011fi, bu s\u00fcre\u00e7teki kilit oyuncular\u0131n rolleri, dikkat edilmesi gereken p\u00fcf noktalar\u0131 ve g\u00fcvenli\u011fin s\u00fcrd\u00fcr\u00fclebilirli\u011fi i\u00e7in anahtar y\u00f6netimi gibi konular\u0131 ele alaca\u011f\u0131z.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Domain-Adiniz-Icin-DNSSEC-Nasil-Aktif-Edilir\"><\/span>Domain Ad\u0131n\u0131z \u0130\u00e7in DNSSEC Nas\u0131l Aktif Edilir?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC aktivasyonu genellikle iki temel ad\u0131mdan olu\u015fur:<\/p>\n<ol>\n<li><b>DNS Sa\u011flay\u0131c\u0131s\u0131nda Etkinle\u015ftirme:<\/b> \u0130lk olarak, alan ad\u0131n\u0131z\u0131n DNS kay\u0131tlar\u0131n\u0131 y\u00f6neten servis sa\u011flay\u0131c\u0131n\u0131n (DNS host) panelinden DNSSEC&#8217;i etkinle\u015ftirmeniz gerekir. \u0130HS Telekom gibi modern <a href=\"https:\/\/www.ihs.com.tr\/web-hosting\/\" target=\"_blank\">hosting<\/a> sa\u011flay\u0131c\u0131lar\u0131, bu i\u015flemi genellikle kontrol panelindeki tek bir butona t\u0131klayarak kolayca yapman\u0131za olanak tan\u0131r. Bu i\u015flem, DNS b\u00f6lgenizin imzalanmas\u0131n\u0131 ve gerekli DNSSEC kay\u0131tlar\u0131n\u0131n (DNSKEY, RRSIG, NSEC3 vb.) otomatik olarak olu\u015fturulmas\u0131n\u0131 sa\u011flar.<\/li>\n<li><b>DS Kayd\u0131n\u0131 Registrar&#8217;a Ekleme:<\/b> DNS sa\u011flay\u0131c\u0131n\u0131z DNSSEC&#8217;i etkinle\u015ftirdi\u011finde, size bir veya daha fazla DS (Delegation Signer) kayd\u0131 sunacakt\u0131r. Bu kay\u0131t, g\u00fcven zincirini olu\u015fturmak i\u00e7in gereklidir. Bu DS kayd\u0131n\u0131 kopyalay\u0131p, alan ad\u0131n\u0131z\u0131 tescil etti\u011finiz kay\u0131t firmas\u0131n\u0131n (registrar) kontrol paneline girmeniz gerekir. Registrar, bu DS kayd\u0131n\u0131 \u00fcst d\u00fczey domain (.com, .tr gibi) kay\u0131tlar\u0131na ekleyerek g\u00fcven zincirini tamamlar.<\/li>\n<\/ol>\n<p>Bu iki ad\u0131m tamamland\u0131\u011f\u0131nda, alan ad\u0131n\u0131z DNSSEC ile korunmaya ba\u015flar.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Alan-Adi-Kayit-Firmasi-Registrar-ve-DNS-Saglayicisinin-Rolu\"><\/span>Alan Ad\u0131 Kay\u0131t Firmas\u0131 (Registrar) ve DNS Sa\u011flay\u0131c\u0131s\u0131n\u0131n Rol\u00fc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC kurulumunda iki ana taraf bulunur ve rollerinin do\u011fru anla\u015f\u0131lmas\u0131 \u00f6nemlidir:<\/p>\n<ul>\n<li><b>DNS Sa\u011flay\u0131c\u0131s\u0131 (DNS Host):<\/b> Alan ad\u0131n\u0131z\u0131n isim sunucular\u0131n\u0131 bar\u0131nd\u0131ran ve DNS kay\u0131tlar\u0131n\u0131z\u0131 (A, MX, CNAME vb.) y\u00f6neten \u015firkettir. DNSSEC ba\u011flam\u0131nda g\u00f6revi, DNS b\u00f6lgenizi kriptografik anahtarlarla (ZSK ve KSK) imzalamak, RRSIG, DNSKEY gibi DNSSEC kay\u0131tlar\u0131n\u0131 olu\u015fturmak ve y\u00f6netmek ve do\u011frulama i\u00e7in gerekli olan DS kayd\u0131n\u0131 size sa\u011flamakt\u0131r.<\/li>\n<li><b>Alan Ad\u0131 Kay\u0131t Firmas\u0131 (Registrar):<\/b> Domain ad\u0131n\u0131z\u0131 ad\u0131n\u0131za tescil ettirdi\u011finiz \u015firkettir. G\u00f6revi, DNS sa\u011flay\u0131c\u0131n\u0131zdan ald\u0131\u011f\u0131n\u0131z DS kayd\u0131n\u0131, \u00fcst d\u00fczey alan ad\u0131 (TLD) sunucular\u0131na ileterek yay\u0131nlamakt\u0131r. Bu i\u015flem, sizin alan ad\u0131n\u0131z ile internetin genel g\u00fcven zinciri aras\u0131ndaki ba\u011flant\u0131y\u0131 kurar.<\/li>\n<\/ul>\n<p>Baz\u0131 durumlarda bu iki rol\u00fc ayn\u0131 firma (\u00f6rne\u011fin \u0130HS Telekom) \u00fcstlenebilir, bu da s\u00fcreci olduk\u00e7a basitle\u015ftirir.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNSSEC-Kurulumunda-Dikkat-Edilmesi-Gerekenler\"><\/span>DNSSEC Kurulumunda Dikkat Edilmesi Gerekenler<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC kurulumu, do\u011fru yap\u0131lmad\u0131\u011f\u0131nda alan ad\u0131n\u0131z\u0131n eri\u015filemez hale gelmesine neden olabilecek hassas bir s\u00fcre\u00e7tir. Dikkat edilmesi gereken baz\u0131 \u00f6nemli noktalar \u015funlard\u0131r:<\/p>\n<ul>\n<li><b>Destek Kontrol\u00fc:<\/b> Hem alan ad\u0131 kay\u0131t firman\u0131z\u0131n hem de DNS sa\u011flay\u0131c\u0131n\u0131z\u0131n DNSSEC&#8217;i destekledi\u011finden emin olun. Ayr\u0131ca, alan ad\u0131 uzant\u0131n\u0131z\u0131n (.com, .net, .istanbul vb.) da DNSSEC uyumlu olmas\u0131 gerekir.<\/li>\n<li><b>Do\u011fru DS Kayd\u0131:<\/b> Registrar paneline girilen DS kayd\u0131n\u0131n, DNS sa\u011flay\u0131c\u0131s\u0131n\u0131n verdi\u011fi kay\u0131tla birebir ayn\u0131 olmas\u0131 hayati \u00f6nem ta\u015f\u0131r. Hatal\u0131 bir kay\u0131t, do\u011frulama zincirini k\u0131rar ve sitenize eri\u015fimi engeller.<\/li>\n<li><b>TTL S\u00fcreleri:<\/b> De\u011fi\u015fiklik yapmadan \u00f6nce ilgili DNS kay\u0131tlar\u0131n\u0131n TTL (Time to Live) s\u00fcrelerini g\u00f6z \u00f6n\u00fcnde bulundurun. De\u011fi\u015fikliklerin internet geneline yay\u0131lmas\u0131 zaman alabilir.<\/li>\n<li><b>Test ve Do\u011frulama:<\/b> Aktivasyon tamamland\u0131ktan sonra, Verisign DNSSEC Debugger veya DNSViz gibi \u00e7evrimi\u00e7i ara\u00e7lar kullanarak kurulumun do\u011fru yap\u0131ld\u0131\u011f\u0131n\u0131 ve g\u00fcven zincirinin sorunsuz \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131 mutlaka test edin.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Anahtar-Yonetimi-Key-Rollover-ve-Sureklilik\"><\/span>Anahtar Y\u00f6netimi (Key Rollover) ve S\u00fcreklilik<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC&#8217;in g\u00fcvenli\u011fini s\u00fcrd\u00fcrmek i\u00e7in kullan\u0131lan kriptografik anahtarlar\u0131n (ZSK ve KSK) d\u00fczenli olarak de\u011fi\u015ftirilmesi gerekir. Bu i\u015fleme &#8220;Key Rollover&#8221; (Anahtar De\u011fi\u015fimi) denir. Anahtarlar\u0131n periyodik olarak yenilenmesi, potansiyel bir anahtar s\u0131z\u0131nt\u0131s\u0131 veya k\u0131r\u0131lmas\u0131 riskini en aza indirir.<\/p>\n<p>Anahtar de\u011fi\u015fimi, kesintiye yol a\u00e7mamak i\u00e7in dikkatli bir \u015fekilde planlanmal\u0131d\u0131r. Genellikle eski anahtar\u0131n ge\u00e7erlili\u011fi sona ermeden yeni anahtar yay\u0131nlan\u0131r ve bir s\u00fcre her ikisi de aktif olur. Bu, DNS \u00e7\u00f6z\u00fcmleyicilerinin \u00f6nbelleklerindeki eski bilgilerin g\u00fcncellenmesi i\u00e7in zaman tan\u0131r. G\u00fcvenilir bir DNS sa\u011flay\u0131c\u0131s\u0131, bu anahtar y\u00f6netimi s\u00fcrecini sizin i\u00e7in otomatik olarak ve sorunsuz bir \u015fekilde y\u00f6neterek DNSSEC korumas\u0131n\u0131n kesintisiz devam etmesini sa\u011flar.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DNSSEC-ve-Sikca-Sorulan-Sorular\"><\/span>DNSSEC ve S\u0131k\u00e7a Sorulan Sorular<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>DNSSEC, domain g\u00fcvenli\u011fi i\u00e7in g\u00fc\u00e7l\u00fc bir teknoloji olmas\u0131na ra\u011fmen, uygulanmas\u0131 ve i\u015fleyi\u015fi hakk\u0131nda ak\u0131llarda baz\u0131 sorular olu\u015fabilir. Performans etkilerinden, SSL\/TLS ile olan ili\u015fkisine kadar merak edilen konular\u0131 bu b\u00f6l\u00fcmde netle\u015ftirece\u011fiz. \u0130\u015fte DNSSEC hakk\u0131nda en s\u0131k sorulan sorular ve yan\u0131tlar\u0131.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNSSEC-Sitemi-Yavaslatir-mi\"><\/span>DNSSEC Sitemi Yava\u015flat\u0131r m\u0131?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Bu, en yayg\u0131n endi\u015felerden biridir. Teorik olarak, DNSSEC ek do\u011frulama ad\u0131mlar\u0131 ve daha b\u00fcy\u00fck DNS yan\u0131t paketleri (imza kay\u0131tlar\u0131 nedeniyle) getirdi\u011fi i\u00e7in bir miktar ek y\u00fck olu\u015fturur. Ancak pratikte son kullan\u0131c\u0131 i\u00e7in bu yava\u015flama neredeyse fark edilemez d\u00fczeydedir. Bunun nedeni, DNS \u00e7\u00f6z\u00fcmleyicilerinin (resolver) do\u011frulanan kay\u0131tlar\u0131 \u00f6nbelle\u011fe almas\u0131d\u0131r. Bir kay\u0131t bir kez do\u011fruland\u0131ktan sonra, ayn\u0131 \u00e7\u00f6z\u00fcmleyiciyi kullanan di\u011fer kullan\u0131c\u0131lar i\u00e7in tekrar do\u011frulanmas\u0131na gerek kalmaz ve yan\u0131tlar \u00f6nbellekten h\u0131zla sunulur. Modern donan\u0131mlar ve optimize edilmi\u015f yaz\u0131l\u0131mlar sayesinde, DNSSEC&#8217;in performans \u00fczerindeki etkisi ihmal edilebilir d\u00fczeydedir.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Her-Domain-Uzantisi-DNSSEC-Destekliyor-mu\"><\/span>Her Domain Uzant\u0131s\u0131 DNSSEC Destekliyor mu?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Hay\u0131r, her domain uzant\u0131s\u0131 (TLD &#8211; Top-Level Domain) DNSSEC&#8217;i desteklemeyebilir, ancak g\u00fcn\u00fcm\u00fczde b\u00fcy\u00fck \u00e7o\u011funlu\u011fu desteklemektedir. .com, .net, .org gibi genel TLD&#8217;ler ve \u00e7o\u011fu \u00fclke kodu TLD&#8217;si (.tr, .de, .uk gibi) DNSSEC uyumludur. Ancak, baz\u0131 daha yeni veya daha az yayg\u0131n olan TLD&#8217;lerde bu destek bulunmayabilir. Bir <a href=\"https:\/\/www.ihs.com.tr\/domain\/alan-adi-domain-transferi.html\" target=\"_blank\">alan ad\u0131<\/a> i\u00e7in DNSSEC&#8217;i etkinle\u015ftirmeyi planl\u0131yorsan\u0131z, \u00f6ncelikle alan ad\u0131 kay\u0131t firman\u0131za dan\u0131\u015farak uzant\u0131n\u0131z\u0131n bu teknolojiyi destekleyip desteklemedi\u011fini teyit etmeniz \u00f6nemlidir.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNSSEC-SSLTLS-Sertifikasinin-Yerini-Alir-mi\"><\/span>DNSSEC, SSL\/TLS Sertifikas\u0131n\u0131n Yerini Al\u0131r m\u0131?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Kesinlikle hay\u0131r. DNSSEC ve SSL\/TLS (genellikle <a href=\"https:\/\/www.ihs.com.tr\/ssl\/\" target=\"_blank\">SSL sertifikas\u0131<\/a> olarak bilinir) birbirini tamamlayan, ancak farkl\u0131 ama\u00e7lara hizmet eden iki ayr\u0131 g\u00fcvenlik teknolojisidir. Onlar\u0131n g\u00f6revlerini ve nas\u0131l birlikte \u00e7al\u0131\u015ft\u0131klar\u0131n\u0131 anlamak, b\u00fct\u00fcnsel bir web g\u00fcvenli\u011fi stratejisi i\u00e7in kritiktir.<\/p>\n<div class=\"karsilastirma\">\n<table>\n<thead>\n<tr>\n<th>\u00d6zellik<\/th>\n<th>DNSSEC<\/th>\n<th>SSL\/TLS Sertifikas\u0131<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><b>Amac\u0131<\/b><\/td>\n<td>Do\u011fru sunucuya y\u00f6nlendirildi\u011finizi do\u011frular (Yolun G\u00fcvenli\u011fi).<\/td>\n<td>Sunucu ile aran\u0131zdaki veri ileti\u015fimini \u015fifreler (Yoldaki Verinin G\u00fcvenli\u011fi).<\/td>\n<\/tr>\n<tr>\n<td><b>Korudu\u011fu \u015eey<\/b><\/td>\n<td>DNS sorgu ve yan\u0131tlar\u0131n\u0131 korur.<\/td>\n<td>HTTP trafi\u011fini (web sitesi verileri, form bilgileri, parolalar vb.) korur.<\/td>\n<\/tr>\n<tr>\n<td><b>Sald\u0131r\u0131 \u00d6nlemi<\/b><\/td>\n<td>DNS Spoofing ve Cache Poisoning sald\u0131r\u0131lar\u0131n\u0131 engeller.<\/td>\n<td>Man-in-the-Middle (ortadaki adam) sald\u0131r\u0131lar\u0131nda verilerin okunmas\u0131n\u0131 engeller.<\/td>\n<\/tr>\n<tr>\n<td><b>\u00c7al\u0131\u015fma Alan\u0131<\/b><\/td>\n<td>DNS protokol\u00fc seviyesinde \u00e7al\u0131\u015f\u0131r.<\/td>\n<td>Uygulama katman\u0131nda (HTTPS) \u00e7al\u0131\u015f\u0131r.<\/td>\n<\/tr>\n<tr>\n<td><b>G\u00f6r\u00fcn\u00fcrl\u00fck<\/b><\/td>\n<td>Son kullan\u0131c\u0131 i\u00e7in do\u011frudan g\u00f6r\u00fcn\u00fcr bir i\u015fareti yoktur.<\/td>\n<td>Taray\u0131c\u0131da kilit simgesi ve &#8220;https:\/\/&#8221; ile g\u00f6sterilir.<\/td>\n<\/tr>\n<tr>\n<td><b>Sonu\u00e7<\/b><\/td>\n<td>Do\u011fru adrese ula\u015ft\u0131\u011f\u0131n\u0131zdan emin olursunuz.<\/td>\n<td>Adrese ula\u015ft\u0131ktan sonraki t\u00fcm ileti\u015fiminizin gizli ve g\u00fcvende oldu\u011fundan emin olursunuz.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u00d6zetle, DNSSEC sizi do\u011fru kap\u0131ya getirir, SSL\/TLS ise kap\u0131dan girdikten sonra i\u00e7erideki konu\u015fmalar\u0131n\u0131z\u0131n gizli kalmas\u0131n\u0131 sa\u011flar. \u0130kisi bir arada kullan\u0131ld\u0131\u011f\u0131nda tam bir g\u00fcvenlik sa\u011flan\u0131r.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DNSSECin-Dezavantajlari-Var-mi\"><\/span>DNSSEC&#8217;in Dezavantajlar\u0131 Var m\u0131?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC&#8217;in avantajlar\u0131 \u00e7ok daha a\u011f\u0131r bassa da, dikkate al\u0131nmas\u0131 gereken baz\u0131 potansiyel zorluklar\u0131 vard\u0131r:<\/p>\n<ul>\n<li><b>Artan Karma\u015f\u0131kl\u0131k:<\/b> DNSSEC&#8217;in kurulumu ve y\u00f6netimi, geleneksel DNS&#8217;e g\u00f6re daha karma\u015f\u0131kt\u0131r. \u00d6zellikle anahtar y\u00f6netimi (key rollover) s\u00fcreci dikkat gerektirir. Ancak \u0130HS Telekom gibi y\u00f6netimi basitle\u015ftiren servis sa\u011flay\u0131c\u0131lar bu karma\u015f\u0131kl\u0131\u011f\u0131 en aza indirir.<\/li>\n<li><b>Yanl\u0131\u015f Yap\u0131land\u0131rma Riski:<\/b> Hatal\u0131 bir DNSSEC yap\u0131land\u0131rmas\u0131 (\u00f6rne\u011fin, registrar&#8217;a yanl\u0131\u015f DS kayd\u0131 girmek veya anahtar de\u011fi\u015fimini hatal\u0131 yapmak) alan ad\u0131n\u0131z\u0131n tamamen eri\u015filemez hale gelmesine neden olabilir. Bu nedenle kurulumun dikkatli yap\u0131lmas\u0131 ve sonras\u0131nda test edilmesi \u00e7ok \u00f6nemlidir.<\/li>\n<li><b>Daha B\u00fcy\u00fck Yan\u0131t Boyutlar\u0131:<\/b> DNSSEC yan\u0131tlar\u0131, imza bilgilerini de i\u00e7erdi\u011fi i\u00e7in standart DNS yan\u0131tlar\u0131ndan daha b\u00fcy\u00fckt\u00fcr. Bu durum, \u00f6zellikle DDoS (Distributed Denial of Service) sald\u0131r\u0131lar\u0131nda DNS trafi\u011finin art\u0131r\u0131lmas\u0131 (amplification) i\u00e7in kullan\u0131lma potansiyeli ta\u015f\u0131yabilir, ancak modern altyap\u0131lar bu riski azaltacak \u015fekilde tasarlanm\u0131\u015ft\u0131r.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"DNSSEC-ve-Domain-Guvenligi-Icin-Neden-IHS-Telekomu-Tercih-Etmelisiniz\"><\/span>DNSSEC ve Domain G\u00fcvenli\u011fi \u0130\u00e7in Neden \u0130HS Telekom&#8217;u Tercih Etmelisiniz?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Domain g\u00fcvenli\u011fi, dijital varl\u0131klar\u0131n\u0131z\u0131n temel ta\u015f\u0131d\u0131r ve bu g\u00fcvenli\u011fi sa\u011flamak uzmanl\u0131k gerektirir. DNSSEC gibi kritik bir teknolojiyi uygularken, do\u011fru i\u015f orta\u011f\u0131n\u0131 se\u00e7mek s\u00fcrecin sorunsuz ve etkili olmas\u0131n\u0131 sa\u011flar. \u0130HS Telekom, geli\u015fmi\u015f altyap\u0131s\u0131, kullan\u0131c\u0131 dostu ara\u00e7lar\u0131 ve uzman deste\u011fi ile domain g\u00fcvenli\u011finizi bir \u00fcst seviyeye ta\u015f\u0131man\u0131z i\u00e7in size kapsaml\u0131 \u00e7\u00f6z\u00fcmler sunar. \u0130\u015fte DNSSEC ve di\u011fer <a href=\"https:\/\/www.ihs.com.tr\/blog\/domain-guvenligi-nasil-saglanir\/\" target=\"_blank\">domain g\u00fcvenli\u011fi<\/a> ihtiya\u00e7lar\u0131n\u0131z i\u00e7in \u0130HS Telekom&#8217;u tercih etmeniz i\u00e7in \u00f6ne \u00e7\u0131kan nedenler.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tek-Tikla-Kolay-DNSSEC-Aktivasyonu\"><\/span>Tek T\u0131kla Kolay DNSSEC Aktivasyonu<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC&#8217;in teknik karma\u015f\u0131kl\u0131\u011f\u0131 bir\u00e7ok kullan\u0131c\u0131 i\u00e7in cayd\u0131r\u0131c\u0131 olabilir. \u0130HS Telekom, bu engeli ortadan kald\u0131rarak DNSSEC aktivasyonunu son derece basitle\u015ftirir. Geli\u015fmi\u015f kontrol panelimiz \u00fczerinden sadece tek bir t\u0131klama ile alan ad\u0131n\u0131z i\u00e7in DNSSEC&#8217;i etkinle\u015ftirebilirsiniz. Arka planda gerekli olan t\u00fcm anahtar olu\u015fturma, b\u00f6lge imzalama ve DS kayd\u0131 haz\u0131rlama i\u015flemleri sistemimiz taraf\u0131ndan otomatik olarak ve hatas\u0131z bir \u015fekilde y\u00f6netilir. Bu sayede, teknik detaylarla u\u011fra\u015fmadan, en \u00fcst d\u00fczey DNS g\u00fcvenli\u011finden an\u0131nda faydalanmaya ba\u015flayabilirsiniz.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Uzman-Teknik-Destek-ve-Danismanlik-Hizmetleri\"><\/span>Uzman Teknik Destek ve Dan\u0131\u015fmanl\u0131k Hizmetleri<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DNSSEC kurulumu ve y\u00f6netimi hassasiyet gerektiren bir s\u00fcre\u00e7tir. Olas\u0131 bir yap\u0131land\u0131rma hatas\u0131, web sitenizin eri\u015filemez hale gelmesine neden olabilir. \u0130HS Telekom&#8217;un deneyimli teknik destek ekibi, bu s\u00fcrecin her a\u015famas\u0131nda yan\u0131n\u0131zdad\u0131r. DNSSEC aktivasyonu, DS kay\u0131tlar\u0131n\u0131n do\u011fru bir \u015fekilde yap\u0131land\u0131r\u0131lmas\u0131 veya olas\u0131 sorunlar\u0131n giderilmesi konular\u0131nda size profesyonel destek sunar\u0131z. Domain g\u00fcvenli\u011fi konusundaki t\u00fcm sorular\u0131n\u0131z i\u00e7in uzman ekibimizden dan\u0131\u015fmanl\u0131k alarak, en do\u011fru ve g\u00fcvenli ad\u0131mlar\u0131 att\u0131\u011f\u0131n\u0131zdan emin olabilirsiniz.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Yuksek-Performansli-ve-Guvenilir-DNS-Altyapisi\"><\/span>Y\u00fcksek Performansl\u0131 ve G\u00fcvenilir DNS Altyap\u0131s\u0131<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Bir g\u00fcvenlik katman\u0131, performanstan \u00f6d\u00fcn vermemelidir. \u0130HS Telekom&#8217;un DNS altyap\u0131s\u0131, hem y\u00fcksek g\u00fcvenlik hem de maksimum h\u0131z ve eri\u015filebilirlik (uptime) sunacak \u015fekilde tasarlanm\u0131\u015ft\u0131r. DNSSEC sorgular\u0131n\u0131n ek y\u00fck\u00fcn\u00fc sorunsuz bir \u015fekilde kar\u015f\u0131layabilen, co\u011frafi olarak yedekli ve g\u00fc\u00e7l\u00fc <a href=\"https:\/\/www.ihs.com.tr\/sunucu-kiralama\/\" target=\"_blank\">sunucu<\/a> altyap\u0131m\u0131z sayesinde, web sitenizin her zaman h\u0131zl\u0131 ve kesintisiz \u00e7al\u0131\u015fmas\u0131n\u0131 garanti ederiz. G\u00fcvenilir DNS hizmetimiz, sitenizin performans\u0131n\u0131 korurken DNSSEC&#8217;in sundu\u011fu t\u00fcm g\u00fcvenlik avantajlar\u0131ndan tam olarak yararlanman\u0131z\u0131 sa\u011flar.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Domain-Guvenliginiz-Icin-Sunulan-Diger-Ek-Hizmetler\"><\/span>Domain G\u00fcvenli\u011finiz \u0130\u00e7in Sunulan Di\u011fer Ek Hizmetler<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0130HS Telekom, domain g\u00fcvenli\u011fini b\u00fct\u00fcnsel bir yakla\u015f\u0131mla ele al\u0131r. DNSSEC&#8217;e ek olarak, alan adlar\u0131n\u0131z\u0131 siber tehditlere kar\u015f\u0131 korumak i\u00e7in bir dizi ek hizmet sunuyoruz:<\/p>\n<ul>\n<li><b>Whois Gizlili\u011fi:<\/b> Alan ad\u0131 sahibi bilgilerinizi gizleyerek istenmeyen e-postalara (spam) ve kimlik h\u0131rs\u0131zl\u0131\u011f\u0131 giri\u015fimlerine kar\u015f\u0131 koruma sa\u011flar.<\/li>\n<li><b>Domain Transfer Kilidi:<\/b> Alan ad\u0131n\u0131z\u0131n bilginiz ve onay\u0131n\u0131z d\u0131\u015f\u0131nda ba\u015fka bir kay\u0131t firmas\u0131na transfer edilmesini engelleyerek yetkisiz domain transferlerinin \u00f6n\u00fcne ge\u00e7er.<\/li>\n<li><b>SSL Sertifikalar\u0131:<\/b> DNSSEC ile do\u011frulanan ba\u011flant\u0131 yolunu, SSL sertifikalar\u0131 ile \u015fifreleyerek veri ileti\u015fiminin tamamen g\u00fcvenli hale gelmesini sa\u011fl\u0131yoruz.<\/li>\n<li><b>G\u00fcvenilir <a href=\"https:\/\/www.ihs.com.tr\/web-hosting\/wordpress-hosting.html\" target=\"_blank\">WordPress hosting<\/a> ve <a href=\"https:\/\/www.ihs.com.tr\/sunucu-kiralama\/vds-sunucu.html\" target=\"_blank\">VDS<\/a> \u00e7\u00f6z\u00fcmleri:<\/b> G\u00fcvenli altyap\u0131 \u00fczerinde \u00e7al\u0131\u015fan hosting ve sunucu hizmetlerimizle web sitenizin t\u00fcm katmanlarda korunmas\u0131na yard\u0131mc\u0131 oluruz.<\/li>\n<\/ul>\n<p>\u0130HS Telekom ile \u00e7al\u0131\u015farak, domain g\u00fcvenli\u011finiz i\u00e7in ihtiya\u00e7 duydu\u011funuz t\u00fcm ara\u00e7 ve uzmanl\u0131\u011fa tek bir noktadan ula\u015fabilirsiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0130nternet d\u00fcnyas\u0131nda her g\u00fcn milyarlarca kullan\u0131c\u0131, web sitelerine eri\u015fmek i\u00e7in alan adlar\u0131n\u0131 kullan\u0131r. Ancak bu basit i\u015flemin arkas\u0131nda, kullan\u0131c\u0131y\u0131 do\u011fru sunucuya y\u00f6nlendiren&hellip;<\/p>\n","protected":false},"author":3,"featured_media":15766,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[398],"tags":[],"class_list":["post-15765","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-alan-adi"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/posts\/15765","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/comments?post=15765"}],"version-history":[{"count":1,"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/posts\/15765\/revisions"}],"predecessor-version":[{"id":15767,"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/posts\/15765\/revisions\/15767"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/media\/15766"}],"wp:attachment":[{"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/media?parent=15765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/categories?post=15765"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ihs.com.tr\/blog\/wp-json\/wp\/v2\/tags?post=15765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}