{"id":23688,"date":"2026-07-19T03:00:42","date_gmt":"2026-07-19T00:00:42","guid":{"rendered":"https:\/\/www.cenuta.com\/blog\/?p=23688"},"modified":"2026-07-19T03:00:44","modified_gmt":"2026-07-19T00:00:44","slug":"domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026","status":"publish","type":"post","link":"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/","title":{"rendered":"Domain Spoofing (Alan Ad\u0131 Sahtecili\u011fi) Nedir, Nas\u0131l \u00c7al\u0131\u015f\u0131r ve Nas\u0131l \u00d6nlenir? Kapsaml\u0131 G\u00fcvenlik Rehberi 2026"},"content":{"rendered":"\n<p>Dijitalle\u015fen d\u00fcnyada internet, hayat\u0131m\u0131z\u0131n vazge\u00e7ilmez bir par\u00e7as\u0131 haline gelirken siber korsanlar\u0131n da oyun alan\u0131 olmaya devam ediyor. Bankac\u0131l\u0131k i\u015flemlerimizden kurumsal e-postalar\u0131m\u0131za, sosyal medya hesaplar\u0131m\u0131zdan \u00e7evrimi\u00e7i al\u0131\u015fveri\u015flerimize kadar her ad\u0131mda g\u00fcvenli\u011fe ihtiya\u00e7 duyuyoruz. Siber sald\u0131rganlar ise g\u00fcvenlik duvarlar\u0131n\u0131 veya antivir\u00fcs yaz\u0131l\u0131mlar\u0131n\u0131 a\u015fman\u0131n zorla\u015ft\u0131\u011f\u0131 noktalarda, sistemin en zay\u0131f halkas\u0131 olan &#8220;insan psikolojisini&#8221; hedef al\u0131yorlar. Bu noktada kar\u015f\u0131m\u0131za \u00e7\u0131kan en tehlikeli ve sinsi sald\u0131r\u0131 t\u00fcrlerinden biri <strong>Domain Spoofing<\/strong>, yani <strong>Alan Ad\u0131 Sahtecili\u011fi<\/strong>dir.<\/p>\n\n\n\n<p>E\u011fer daha \u00f6nce g\u00fcvendi\u011finiz bir bankadan geldi\u011fini sand\u0131\u011f\u0131n\u0131z ancak t\u0131klad\u0131\u011f\u0131n\u0131zda sizi bamba\u015fka bir tuza\u011fa \u00e7eken bir e-posta ald\u0131ysan\u0131z, muhtemelen bir domain spoofing giri\u015fimiyle kar\u015f\u0131 kar\u015f\u0131ya kalm\u0131\u015fs\u0131n\u0131zd\u0131r. Bu kapsaml\u0131 rehberde, alan ad\u0131 sahtecili\u011finin ne oldu\u011funu, siber su\u00e7lular\u0131n bu sistemi nas\u0131l i\u015fletti\u011fini, sahte adresleri nas\u0131l ay\u0131rt edebilece\u011finizi ve hem bireysel hem de kurumsal \u00e7apta bu tehditten nas\u0131l korunabilece\u011finizi t\u00fcm detaylar\u0131yla inceliyoruz.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0130\u00e7indekiler<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a6eb96a83871\" 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-6a6eb96a83871\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Domain_Spoofing_Alan_Adi_Sahteciligi_Nedir\" title=\"Domain Spoofing (Alan Ad\u0131 Sahtecili\u011fi) Nedir?\">Domain Spoofing (Alan Ad\u0131 Sahtecili\u011fi) Nedir?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Domain_Spoofing_Nasil_Calisir_Saldiri_Turleri\" title=\"Domain Spoofing Nas\u0131l \u00c7al\u0131\u015f\u0131r? (Sald\u0131r\u0131 T\u00fcrleri)\">Domain Spoofing Nas\u0131l \u00c7al\u0131\u015f\u0131r? (Sald\u0131r\u0131 T\u00fcrleri)<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#1_E-Posta_Sahteciligi_Email_Spoofing\" title=\"1. E-Posta Sahtecili\u011fi (Email Spoofing)\">1. E-Posta Sahtecili\u011fi (Email Spoofing)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#2_Web_Sitesi_Sahteciligi_Website_Spoofing\" title=\"2. Web Sitesi Sahtecili\u011fi (Website Spoofing)\">2. Web Sitesi Sahtecili\u011fi (Website Spoofing)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#3_DNS_Zehirlenmesi_DNS_Spoofing_Poisoning\" title=\"3. DNS Zehirlenmesi (DNS Spoofing \/ Poisoning)\">3. DNS Zehirlenmesi (DNS Spoofing \/ Poisoning)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Alan_Adi_Sahteciligi_Nasil_Anlasilir_Kurban_Olmamak_Icin_Ipuclari\" title=\"Alan Ad\u0131 Sahtecili\u011fi Nas\u0131l Anla\u015f\u0131l\u0131r? (Kurban Olmamak \u0130\u00e7in \u0130pu\u00e7lar\u0131)\">Alan Ad\u0131 Sahtecili\u011fi Nas\u0131l Anla\u015f\u0131l\u0131r? (Kurban Olmamak \u0130\u00e7in \u0130pu\u00e7lar\u0131)<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Tipografi_Oyunlari_Typosquatting\" title=\"Tipografi Oyunlar\u0131 (Typosquatting)\">Tipografi Oyunlar\u0131 (Typosquatting)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Homograf_Homograph_Saldirilari\" title=\"Homograf (Homograph) Sald\u0131r\u0131lar\u0131\">Homograf (Homograph) Sald\u0131r\u0131lar\u0131<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#E-Posta_Baglantilarini_Linkleri_Kontrol_Etme\" title=\"E-Posta Ba\u011flant\u0131lar\u0131n\u0131 (Linkleri) Kontrol Etme\">E-Posta Ba\u011flant\u0131lar\u0131n\u0131 (Linkleri) Kontrol Etme<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#SSLTLS_Sertifikasi_Eksiklikleri\" title=\"SSL\/TLS Sertifikas\u0131 Eksiklikleri\">SSL\/TLS Sertifikas\u0131 Eksiklikleri<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Alan_Adi_Sahteciligi_Domain_Spoofing_Nasil_Onlenir\" title=\"Alan Ad\u0131 Sahtecili\u011fi (Domain Spoofing) Nas\u0131l \u00d6nlenir?\">Alan Ad\u0131 Sahtecili\u011fi (Domain Spoofing) Nas\u0131l \u00d6nlenir?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Kurumlar_ve_Alan_Adi_Sahipleri_Icin_Onlemler\" title=\"Kurumlar ve Alan Ad\u0131 Sahipleri \u0130\u00e7in \u00d6nlemler\">Kurumlar ve Alan Ad\u0131 Sahipleri \u0130\u00e7in \u00d6nlemler<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Bireysel_Kullanicilar_Icin_Onlemler\" title=\"Bireysel Kullan\u0131c\u0131lar \u0130\u00e7in \u00d6nlemler\">Bireysel Kullan\u0131c\u0131lar \u0130\u00e7in \u00d6nlemler<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/#Sonuc\" title=\"Sonu\u00e7\">Sonu\u00e7<\/a><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Domain_Spoofing_Alan_Adi_Sahteciligi_Nedir\"><\/span>Domain Spoofing (Alan Ad\u0131 Sahtecili\u011fi) Nedir?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Domain Spoofing<\/strong>, siber sald\u0131rganlar\u0131n sahte bir web sitesini veya e-posta adresini, me\u015fru ve g\u00fcvenilir bir kurumun (banka, e-ticaret sitesi, devlet kurumu vb.) orijinal web sitesi veya e-posta adresiymi\u015f gibi k\u0131l\u0131k de\u011fi\u015ftirerek kullan\u0131c\u0131lara sunmas\u0131 i\u015flemidir. \u0130ngilizcedeki &#8220;Spoof&#8221; (kand\u0131rmak, taklit etmek) kelimesinden t\u00fcreyen bu kavram, siber g\u00fcvenlik d\u00fcnyas\u0131nda bir t\u00fcr dijital kimlik h\u0131rs\u0131zl\u0131\u011f\u0131 veya maskeleme operasyonu olarak tan\u0131mlan\u0131r.<\/p>\n\n\n\n<p>Bu sald\u0131r\u0131n\u0131n temel amac\u0131; kurbanlar\u0131n yasal ve g\u00fcvenli bir platformda olduklar\u0131na inanmalar\u0131n\u0131 sa\u011flayarak kredi kart\u0131 numaralar\u0131, \u015fifreler, T.C. Kimlik numaralar\u0131 veya \u015firket i\u00e7i gizli belgeler gibi hassas verilerini ele ge\u00e7irmektir. Sald\u0131rganlar, g\u00fcvenilir bir markan\u0131n ad\u0131n\u0131n arkas\u0131na saklanarak kurban\u0131n \u015f\u00fcphe mekanizmas\u0131n\u0131 devre d\u0131\u015f\u0131 b\u0131rak\u0131rlar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Domain_Spoofing_Nasil_Calisir_Saldiri_Turleri\"><\/span>Domain Spoofing Nas\u0131l \u00c7al\u0131\u015f\u0131r? (Sald\u0131r\u0131 T\u00fcrleri)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Alan ad\u0131 sahtecili\u011fi tek bir y\u00f6ntemle yap\u0131lmaz. Siber korsanlar hedeflerine ula\u015fmak i\u00e7in genellikle \u015fu \u00fc\u00e7 ana y\u00f6ntemi kullan\u0131rlar:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_E-Posta_Sahteciligi_Email_Spoofing\"><\/span>1. E-Posta Sahtecili\u011fi (Email Spoofing)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Sald\u0131rganlar, e-posta protokollerinin (SMTP) do\u011fas\u0131 gere\u011fi sahip oldu\u011fu baz\u0131 teknik bo\u015fluklar\u0131 kullanarak, g\u00f6nderici adresini istedikleri gibi de\u011fi\u015ftirirler.<\/p>\n\n\n\n<p><strong>\u00d6rnek Senaryo:<\/strong> \u015eirketin muhasebe departman\u0131nda \u00e7al\u0131\u015fan Merve, bir sabah genel m\u00fcd\u00fcr\u00fc Levent Bey&#8217;den geldi\u011fi g\u00f6r\u00fcnen bir e-posta al\u0131r. G\u00f6nderen k\u0131sm\u0131nda a\u00e7\u0131k\u00e7a <code>levent.bey@sirketadi.com<\/code> yazmaktad\u0131r. E-postada, acilen belirtilen yeni bir IBAN numaras\u0131na y\u00fcksek miktarda \u00f6deme yap\u0131lmas\u0131 gerekti\u011fi yazar. Merve, g\u00f6nderen adresine g\u00fcvendi\u011fi i\u00e7in \u00f6demeyi yapar. Ancak ger\u00e7ekte o e-posta Levent Bey&#8217;den gelmemi\u015ftir; sald\u0131rgan sadece g\u00f6nderici (From) ba\u015fl\u0131\u011f\u0131n\u0131 manip\u00fcle ederek bir &#8220;Email Spoofing&#8221; ger\u00e7ekle\u015ftirmi\u015ftir.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Web_Sitesi_Sahteciligi_Website_Spoofing\"><\/span>2. Web Sitesi Sahtecili\u011fi (Website Spoofing)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Bu y\u00f6ntemde sald\u0131rganlar, hedefledikleri kurumun web sitesinin pikseli pikseline ayn\u0131s\u0131n\u0131 (logosu, renkleri, men\u00fcleri dahil) tasarlarlar ve orijinaline \u00e7ok benzeyen sahte bir alan ad\u0131 (domain) sat\u0131n al\u0131rlar. Kullan\u0131c\u0131lar bir e-posta linki, sahte bir SMS veya zararl\u0131 bir reklam arac\u0131l\u0131\u011f\u0131yla bu siteye y\u00f6nlendirilirler. Ekranda g\u00f6rd\u00fckleri siteye g\u00fcvenen kullan\u0131c\u0131lar, giri\u015f yapmak i\u00e7in kullan\u0131c\u0131 ad\u0131 ve \u015fifrelerini girdiklerinde bu bilgiler do\u011frudan sald\u0131rgan\u0131n veri taban\u0131na d\u00fc\u015fer.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_DNS_Zehirlenmesi_DNS_Spoofing_Poisoning\"><\/span>3. DNS Zehirlenmesi (DNS Spoofing \/ Poisoning)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Bu, ger\u00e7ekle\u015ftirilmesi en zor ama en tehlikeli domain spoofing t\u00fcrlerinden biridir. DNS (Alan Ad\u0131 Sistemi), taray\u0131c\u0131ya yazd\u0131\u011f\u0131n\u0131z bir adresi (\u00f6rne\u011fin orneksite.com) bilgisayarlar\u0131n anlad\u0131\u011f\u0131 IP adreslerine \u00e7eviren telefon rehberi gibidir. Sald\u0131rganlar, yerel bir a\u011f\u0131n veya bir internet servis sa\u011flay\u0131c\u0131s\u0131n\u0131n DNS sunucular\u0131na s\u0131zarak bu rehberi &#8220;zehirlerler&#8221;. Siz taray\u0131c\u0131n\u0131za do\u011fru adresi eksiksiz ve hatas\u0131z yazsan\u0131z bile, zehirlenmi\u015f DNS sizi orijinal site yerine sald\u0131rgan\u0131n kurdu\u011fu sahte (spoofed) IP adresine y\u00f6nlendirir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Alan_Adi_Sahteciligi_Nasil_Anlasilir_Kurban_Olmamak_Icin_Ipuclari\"><\/span>Alan Ad\u0131 Sahtecili\u011fi Nas\u0131l Anla\u015f\u0131l\u0131r? (Kurban Olmamak \u0130\u00e7in \u0130pu\u00e7lar\u0131)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Sald\u0131rganlar ne kadar profesyonel olurlarsa olsunlar, siber d\u00fcnyada her zaman geride b\u0131rakt\u0131klar\u0131 k\u00fc\u00e7\u00fck izler vard\u0131r. Bir web sitesinin veya e-postan\u0131n sahte oldu\u011funu anlamak i\u00e7in \u015fu detaylara dikkat etmek hayati \u00f6nem ta\u015f\u0131r:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tipografi_Oyunlari_Typosquatting\"><\/span>Tipografi Oyunlar\u0131 (Typosquatting)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Sald\u0131rganlar, orijinal alan ad\u0131na \u00e7ok benzeyen ancak i\u00e7inde k\u00fc\u00e7\u00fck harf hatalar\u0131 bar\u0131nd\u0131ran isimler tescil ederler. \u0130nsan beyni kelimeleri b\u00fct\u00fcn olarak okumaya e\u011filimli oldu\u011fu i\u00e7in bu k\u00fc\u00e7\u00fck hatalar genellikle g\u00f6zden ka\u00e7ar.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Orijinal:<\/strong> <code>instagram.com<\/code><\/li>\n\n\n\n<li><strong>Sahte:<\/strong> <code>instargam.com<\/code> (r ve g yer de\u011fi\u015ftirmi\u015f)<\/li>\n\n\n\n<li><strong>Sahte:<\/strong> <code>1nstagram.com<\/code> (i yerine 1 rakam\u0131 kullan\u0131lm\u0131\u015f)<\/li>\n\n\n\n<li><strong>Sahte:<\/strong> <code>rnicrosoft.com<\/code> (m harfi yerine r ve n harfleri yan yana getirilerek &#8216;m&#8217; ill\u00fczyonu yarat\u0131lm\u0131\u015f)<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Homograf_Homograph_Saldirilari\"><\/span>Homograf (Homograph) Sald\u0131r\u0131lar\u0131<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Bu, siber korsanlar\u0131n en sinsi hilelerinden biridir. URL adresinde kullan\u0131lan harfler, Latin alfabesinden de\u011fil, g\u00f6rsel olarak tamamen ayn\u0131 g\u00f6r\u00fcnen Kiril (Rus\u00e7a) veya Yunan alfabelerinden se\u00e7ilir. \u00d6rne\u011fin; \u0130ngilizce <code>a<\/code> harfi ile Kiril alfabesindeki <code>\u0430<\/code> harfi ekranda birebir ayn\u0131 g\u00f6r\u00fcn\u00fcr ancak bilgisayar (ve alan ad\u0131 kay\u0131t sistemi) i\u00e7in bunlar tamamen farkl\u0131 iki karakterdir. Bu y\u00fczden taray\u0131c\u0131 \u00e7ubu\u011funda <code>apple.com<\/code> yaz\u0131yor gibi g\u00f6r\u00fcnse de asl\u0131nda tamamen sahte bir sitede olabilirsiniz.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"E-Posta_Baglantilarini_Linkleri_Kontrol_Etme\"><\/span>E-Posta Ba\u011flant\u0131lar\u0131n\u0131 (Linkleri) Kontrol Etme<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Size gelen bir e-postan\u0131n i\u00e7indeki &#8220;Hesab\u0131n\u0131z\u0131 Do\u011frulay\u0131n&#8221; veya &#8220;Kargonuzu Takip Edin&#8221; butonuna t\u0131klamadan \u00f6nce, fare imlecini o butonun (veya linkin) \u00fczerinde bekletin. Taray\u0131c\u0131n\u0131z\u0131n veya mail program\u0131n\u0131z\u0131n sol alt k\u00f6\u015fesinde, o linkin sizi <em>ger\u00e7ekte<\/em> hangi adrese y\u00f6nlendirece\u011fi yazacakt\u0131r. Metin ile alttaki adres uyu\u015fmuyorsa, kesinlikle t\u0131klamay\u0131n.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SSLTLS_Sertifikasi_Eksiklikleri\"><\/span>SSL\/TLS Sertifikas\u0131 Eksiklikleri<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Adres \u00e7ubu\u011funun sol taraf\u0131nda kapal\u0131 bir &#8220;asma kilit&#8221; simgesinin (HTTPS) olmas\u0131, o sitenin g\u00fcvenli oldu\u011fu anlam\u0131na gelir. Ancak g\u00fcn\u00fcm\u00fczde sald\u0131rganlar da sahte sitelerine \u00fccretsiz SSL sertifikalar\u0131 alabilmektedir. Kilit simgesi sadece sizinle site aras\u0131ndaki verinin \u015fifrelendi\u011fini g\u00f6sterir, sitenin kime ait oldu\u011funu kan\u0131tlamaz. Bu y\u00fczden kilit simgesine g\u00fcvenip alan ad\u0131n\u0131 okumamazl\u0131k etmeyin; kilide t\u0131klayarak sertifikan\u0131n ger\u00e7ekten o kuruma m\u0131 verildi\u011fini kontrol edin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Alan_Adi_Sahteciligi_Domain_Spoofing_Nasil_Onlenir\"><\/span>Alan Ad\u0131 Sahtecili\u011fi (Domain Spoofing) Nas\u0131l \u00d6nlenir?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Bu b\u00fcy\u00fck siber tehditle m\u00fccadele etmek, hem alan ad\u0131 sahiplerine (kurumlara) hem de son kullan\u0131c\u0131lara d\u00fc\u015fen ortak bir sorumluluktur.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kurumlar_ve_Alan_Adi_Sahipleri_Icin_Onlemler\"><\/span>Kurumlar ve Alan Ad\u0131 Sahipleri \u0130\u00e7in \u00d6nlemler<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>E\u011fer bir web siteniz veya \u015firket e-postan\u0131z varsa, markan\u0131z\u0131n ad\u0131n\u0131n kullan\u0131larak ba\u015fkalar\u0131n\u0131n doland\u0131r\u0131lmas\u0131n\u0131 engellemek zorundas\u0131n\u0131z. Bunun i\u00e7in e-posta sunucular\u0131n\u0131zda a\u015fa\u011f\u0131daki \u00fc\u00e7 alt\u0131n g\u00fcvenlik protokol\u00fcn\u00fc (DNS kay\u0131tlar\u0131n\u0131) mutlaka yap\u0131land\u0131rmal\u0131s\u0131n\u0131z:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>SPF (Sender Policy Framework):<\/strong> Alan ad\u0131n\u0131z ad\u0131na hangi sunucular\u0131n ve IP adreslerinin e-posta g\u00f6ndermeye yetkili oldu\u011funu belirleyen bir listedir. Sald\u0131rgan ba\u015fka bir sunucudan sizin ad\u0131n\u0131za mail att\u0131\u011f\u0131nda, al\u0131c\u0131n\u0131n sunucusu bu SPF kayd\u0131na bakar ve e\u015fle\u015fme g\u00f6remezse maili &#8220;Spam&#8221; kutusuna atar.<\/li>\n\n\n\n<li><strong>DKIM (DomainKeys Identified Mail):<\/strong> G\u00f6nderdi\u011finiz her e-postaya g\u00f6r\u00fcnmez bir dijital (kriptografik) imza ekler. Bu imza, e-postan\u0131n yolda de\u011fi\u015ftirilmedi\u011fini ve ger\u00e7ekten sizin sunucunuzdan \u00e7\u0131kt\u0131\u011f\u0131n\u0131 kan\u0131tlar.<\/li>\n\n\n\n<li><strong>DMARC (Domain-based Message Authentication, Reporting and Conformance):<\/strong> SPF ve DKIM protokollerini birle\u015ftiren y\u00f6neticidir. Al\u0131c\u0131 sunucuya \u015fu emri verir: <em>&#8220;E\u011fer benim ad\u0131ma gelen bir e-posta SPF veya DKIM testlerinden ge\u00e7emezse, o e-postay\u0131 do\u011frudan reddet ve bana bu sahtecilik giri\u015fimiyle ilgili bir rapor g\u00f6nder.&#8221;<\/em><\/li>\n<\/ol>\n\n\n\n<p>Ayr\u0131ca b\u00fcy\u00fck markalar, isimlerine benzeyen hatal\u0131 yaz\u0131ml\u0131 alan adlar\u0131n\u0131 (typosquatting) kendileri sat\u0131n al\u0131p orijinal siteye y\u00f6nlendirerek, sald\u0131rganlar\u0131n bu isimleri almas\u0131n\u0131n \u00f6n\u00fcne ge\u00e7mektedir.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bireysel_Kullanicilar_Icin_Onlemler\"><\/span>Bireysel Kullan\u0131c\u0131lar \u0130\u00e7in \u00d6nlemler<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Dikkatli G\u00f6zlem:<\/strong> Aceleci davranmay\u0131n. \u00d6zellikle sizden acil para transferi, \u015fifre de\u011fi\u015fikli\u011fi veya do\u011frulama isteyen e-postalar\u0131n g\u00f6nderici adreslerini karakter karakter okuyun.<\/li>\n\n\n\n<li><strong>Ba\u011flant\u0131lara T\u0131klamak Yerine Elle Yaz\u0131n:<\/strong> Bankan\u0131zdan &#8220;Hesab\u0131n\u0131z ask\u0131ya al\u0131nd\u0131, buraya t\u0131klay\u0131n&#8221; \u015feklinde bir mesaj al\u0131rsan\u0131z o mesaja t\u0131klamay\u0131n. Taray\u0131c\u0131n\u0131z\u0131 a\u00e7\u0131p bankan\u0131z\u0131n adresini bizzat kendiniz yazarak hesab\u0131n\u0131za giri\u015f yap\u0131n.<\/li>\n\n\n\n<li><strong>\u0130ki A\u015famal\u0131 Do\u011frulama (2FA) Kullan\u0131n:<\/strong> Siber korsanlar sahte bir site arac\u0131l\u0131\u011f\u0131yla \u015fifrenizi ele ge\u00e7irseler bile, telefonunuza veya mobil uygulaman\u0131za gelecek olan ikinci onay kodu (2FA) olmadan hesab\u0131n\u0131za giremezler.<\/li>\n\n\n\n<li><strong>Parola Y\u00f6neticisi (Password Manager) Kullan\u0131n:<\/strong> \u0130yi bir parola y\u00f6neticisi, hangi sitede oldu\u011funuzu URL \u00fczerinden anlar. E\u011fer orijinal <code>facebook.com<\/code> yerine sahte <code>facebo0k.com<\/code> sitesine girerseniz, parola y\u00f6neticiniz adresin farkl\u0131 oldu\u011funu anlar ve \u015fifrenizi otomatik doldurmaz. Bu, spoofing sald\u0131r\u0131lar\u0131na kar\u015f\u0131 en g\u00fc\u00e7l\u00fc donan\u0131mlardan biridir.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Sonuc\"><\/span>Sonu\u00e7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Domain spoofing, dijital d\u00fcnyan\u0131n en eski ama \u015fekil de\u011fi\u015ftirerek hayatta kalmay\u0131 ba\u015faran en tehlikeli sosyal m\u00fchendislik sald\u0131r\u0131lar\u0131ndan biridir. Unutmay\u0131n ki siber d\u00fcnyada g\u00fcvenlik, sadece karma\u015f\u0131k yaz\u0131l\u0131mlarla veya pahal\u0131 antivir\u00fcs programlar\u0131yla sa\u011flanamaz. \u015eirketlerin DMARC, SPF ve DKIM gibi altyap\u0131 \u00f6nlemlerini eksiksiz uygulamas\u0131 gerekti\u011fi kadar; kullan\u0131c\u0131lar\u0131n da her zaman &#8220;s\u0131f\u0131r g\u00fcven&#8221; (zero trust) prensibiyle hareket ederek t\u0131klad\u0131klar\u0131 ba\u011flant\u0131lar\u0131, okuduklar\u0131 e-postalar\u0131 ve girdikleri adresleri sorgulamas\u0131 \u015fartt\u0131r. Bilin\u00e7li bir dijital okuryazarl\u0131k, siber tuzaklara kar\u015f\u0131 en g\u00fc\u00e7l\u00fc kalkan\u0131n\u0131zd\u0131r.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dijitalle\u015fen d\u00fcnyada internet, hayat\u0131m\u0131z\u0131n vazge\u00e7ilmez bir par\u00e7as\u0131 haline gelirken siber<a href=\"https:\/\/www.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/\">&#8230;<\/a><\/p>\n","protected":false},"author":6,"featured_media":23689,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-23688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-genel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\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.cenuta.com\/blog\/domain-spoofing-alan-adi-sahteciligi-nedir-nasil-calisir-ve-nasil-onlenir-kapsamli-guvenlik-rehberi-2026\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Domain Spoofing (Alan Ad\u0131 Sahtecili\u011fi) Nedir, Nas\u0131l \u00c7al\u0131\u015f\u0131r ve Nas\u0131l \u00d6nlenir? 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