{"id":582,"date":"2024-09-29T16:46:30","date_gmt":"2024-09-29T13:46:30","guid":{"rendered":"https:\/\/buqnet.com.tr\/?page_id=582"},"modified":"2024-10-02T19:06:24","modified_gmt":"2024-10-02T16:06:24","slug":"dns-guvenligi","status":"publish","type":"page","link":"https:\/\/buqnet.com.tr\/?page_id=582","title":{"rendered":"DNS G\u00fcvenli\u011fi"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"313\" src=\"https:\/\/buqnet.com.tr\/wp-content\/uploads\/2024\/09\/dnsguvenligi-1024x313.jpg\" alt=\"\" class=\"wp-image-666\" srcset=\"https:\/\/buqnet.com.tr\/wp-content\/uploads\/2024\/09\/dnsguvenligi-1024x313.jpg 1024w, https:\/\/buqnet.com.tr\/wp-content\/uploads\/2024\/09\/dnsguvenligi-300x92.jpg 300w, https:\/\/buqnet.com.tr\/wp-content\/uploads\/2024\/09\/dnsguvenligi-768x235.jpg 768w, https:\/\/buqnet.com.tr\/wp-content\/uploads\/2024\/09\/dnsguvenligi-1536x469.jpg 1536w, https:\/\/buqnet.com.tr\/wp-content\/uploads\/2024\/09\/dnsguvenligi.jpg 1800w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>A\u011f i\u00e7inde ve\/veya d\u0131\u015f\u0131ndaki cihazlar, g\u00fcvenli\u011fi her zaman kontrol\u00fcn\u00fcz alt\u0131nda olmayabilen kar\u0131\u015f\u0131k, fiziksel ve bulut altyap\u0131s\u0131n\u0131 s\u00fcrekli olarak kullanmakta ve a\u011f\u0131n\u0131z s\u00fcrekli k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m tehditlerine maruz kalabilmektedir. K\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131mlar\u0131n y\u00fczde&nbsp;90&#8217;dan&nbsp;fazlas\u0131, Komuta ve Kontrol sunucular\u0131 ile ileti\u015fim kurmak, veri \u00e7almak veya&nbsp;tarfi\u011fi k\u00f6t\u00fc ama\u00e7l\u0131 sitelere y\u00f6nlendirmek i\u00e7in DNS&#8217;i kullanmaktad\u0131r.<\/p>\n\n\n\n<p>DNS g\u00fcvenli\u011fi \u00e7\u00f6z\u00fcmleri ile DNS&#8217;i Komuta ve Kontrol sunucular ve botnet&#8217;lerle ileti\u015fim kurmak i\u00e7in kullan\u0131lan, h\u0131zl\u0131ca geli\u015fen, ka\u00e7\u0131n\u0131lmaz k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m tehditlerine kar\u015f\u0131 proaktif a\u011f korumas\u0131 elde edilmektedir. DHCP parmak izi, IPM ve Kimlik E\u015fleme ile birlikte \u00e7al\u0131\u015farak tehlikeye at\u0131lm\u0131\u015f cihazlar\u0131n h\u0131zla tespit edilmesini, enfekte olmu\u015f sistemlerin izole edilmesini, k\u00f6t\u00fc ama\u00e7l\u0131 Komuta ve Konrol sunucular\u0131 ve bontnet&#8217;lerle DNS ileti\u015fimin \u00f6nlenmesi sa\u011flanmaktad\u0131r.&nbsp;&nbsp;<\/p>\n\n\n\n<p>DNS (Domain Name System &#8211; Alan Ad\u0131 Sistemi) g\u00fcvenli\u011fi, internet \u00fczerindeki alan ad\u0131 sorgular\u0131n\u0131n g\u00fcvenli\u011fini sa\u011flamay\u0131 hedefleyen bir dizi teknolojiyi ve en iyi uygulamalar\u0131 kapsar. DNS, IP adresleri ile alan adlar\u0131n\u0131 e\u015fle\u015ftirerek kullan\u0131c\u0131lar\u0131n internet \u00fczerindeki kaynaklara eri\u015fimini sa\u011flar. Ancak, DNS\u2019in do\u011fas\u0131 gere\u011fi baz\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131 bulunur ve bu a\u00e7\u0131klar siber sald\u0131r\u0131lar i\u00e7in hedef haline gelebilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DNS G\u00fcvenli\u011fi Neden \u00d6nemlidir?<\/h3>\n\n\n\n<p>DNS, internetin i\u015fleyi\u015finin temel ta\u015flar\u0131ndan biridir. Kullan\u0131c\u0131lar\u0131n web sitelerine, e-posta hizmetlerine veya di\u011fer internet hizmetlerine eri\u015fmesi DNS sorgular\u0131yla m\u00fcmk\u00fcnd\u00fcr. DNS g\u00fcvenli\u011finin ihlali, bir\u00e7ok kritik sald\u0131r\u0131ya neden olabilir, \u00f6rne\u011fin:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Kimlik av\u0131 (phishing)<\/strong> sitelerine y\u00f6nlendirme.<\/li>\n\n\n\n<li><strong>DNS sahtecili\u011fi (DNS spoofing)<\/strong> ile kullan\u0131c\u0131lar\u0131n zararl\u0131 sitelere g\u00f6nderilmesi.<\/li>\n\n\n\n<li><strong>DDoS (Da\u011f\u0131t\u0131k Hizmet Engelleme)<\/strong> sald\u0131r\u0131lar\u0131yla DNS sunucular\u0131n\u0131n devre d\u0131\u015f\u0131 b\u0131rak\u0131lmas\u0131.<\/li>\n\n\n\n<li><strong>Veri gizlili\u011fi ve b\u00fct\u00fcnl\u00fc\u011f\u00fc<\/strong> riskleri.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">DNS G\u00fcvenli\u011fi Tehditleri<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>DNS Spoofing (Sahtekarl\u0131\u011f\u0131) ve Cache Poisoning<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNS sahtekarl\u0131\u011f\u0131, bir DNS sorgusunun yanl\u0131\u015f bir IP adresi ile yan\u0131tlanmas\u0131d\u0131r. Bu sayede sald\u0131rganlar kullan\u0131c\u0131lar\u0131 sahte veya zararl\u0131 sitelere y\u00f6nlendirebilir.<\/li>\n\n\n\n<li><strong>Cache poisoning<\/strong> (\u00f6nbellek zehirlenmesi) ise DNS sunucular\u0131nda \u00f6nbelle\u011fe al\u0131nan kay\u0131tlar\u0131n yanl\u0131\u015f bilgilerle de\u011fi\u015ftirilmesidir.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DNS T\u00fcnelleme (DNS Tunneling)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNS, veri transferi i\u00e7in de kullan\u0131labilir. Bu t\u00fcr sald\u0131r\u0131larda, sald\u0131rganlar DNS protokol\u00fc \u00fczerinden veri ka\u00e7\u0131rabilir veya k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m komutlar\u0131n\u0131 iletebilir.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DDoS Sald\u0131r\u0131lar\u0131<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNS sunucular\u0131na y\u00f6nelik DDoS sald\u0131r\u0131lar\u0131, sunucular\u0131n a\u015f\u0131r\u0131 y\u00fcklenerek devre d\u0131\u015f\u0131 kalmas\u0131na neden olur. DNS altyap\u0131s\u0131na yap\u0131lan bu t\u00fcr sald\u0131r\u0131lar, kullan\u0131c\u0131lar\u0131n web sitelerine eri\u015fimini tamamen kesebilir.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DNS Amplifikasyon Sald\u0131r\u0131lar\u0131<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Bu sald\u0131r\u0131larda, sald\u0131rganlar k\u00fc\u00e7\u00fck bir DNS sorgusu g\u00f6ndererek b\u00fcy\u00fck DNS yan\u0131tlar\u0131 al\u0131r ve bu yan\u0131tlar\u0131 hedef sisteme y\u00f6nlendirerek a\u015f\u0131r\u0131 y\u00fck yarat\u0131r.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Man-in-the-Middle (Ortadaki Adam) Sald\u0131r\u0131lar\u0131<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Sald\u0131rgan, DNS sorgular\u0131n\u0131n ve yan\u0131tlar\u0131n\u0131n aras\u0131nda durarak trafi\u011fi dinleyebilir veya manip\u00fcle edebilir.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Domain Hijacking (Alan Ad\u0131 Ka\u00e7\u0131rma)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Sald\u0131rganlar, alan ad\u0131 kay\u0131t bilgilerini de\u011fi\u015ftirerek domainleri ele ge\u00e7irir ve bu alan adlar\u0131n\u0131 farkl\u0131 y\u00f6nlendirmelere maruz b\u0131rakabilir.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">DNS G\u00fcvenli\u011fi \u00c7\u00f6z\u00fcmleri<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>DNSSEC (Domain Name System Security Extensions)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNSSEC, DNS sorgular\u0131n\u0131n do\u011frulu\u011funu ve b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc garanti alt\u0131na alan bir g\u00fcvenlik protokol\u00fcd\u00fcr. DNSSEC, DNS kay\u0131tlar\u0131na dijital imzalar ekleyerek sahtekarl\u0131k ve manip\u00fclasyonu \u00f6nler.<\/li>\n\n\n\n<li><strong>Avantajlar\u0131<\/strong>: DNS yan\u0131tlar\u0131n\u0131n do\u011frulu\u011funu garanti eder, sahte DNS yan\u0131tlar\u0131na kar\u015f\u0131 koruma sa\u011flar.<\/li>\n\n\n\n<li><strong>Zorluklar\u0131<\/strong>: DNSSEC kullan\u0131m\u0131 ek yap\u0131land\u0131rma gerektirir ve her DNS sunucusu taraf\u0131ndan desteklenmeyebilir.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DNS Filtreleme<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNS filtreleme, zararl\u0131 ve k\u00f6t\u00fc ama\u00e7l\u0131 bilinen alan adlar\u0131n\u0131n DNS sorgular\u0131nda engellenmesini sa\u011flar. Bu y\u00f6ntem, kullan\u0131c\u0131lar\u0131n zararl\u0131 web sitelerine eri\u015fimini \u00f6nlemekte etkilidir.<\/li>\n\n\n\n<li><strong>Ara\u00e7lar<\/strong>: OpenDNS, Quad9, Cloudflare DNS (1.1.1.1), Google Public DNS.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DNS T\u00fcnelleme Tespiti<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNS t\u00fcnelleme sald\u0131r\u0131lar\u0131n\u0131 tespit etmek i\u00e7in a\u011f trafi\u011fi s\u00fcrekli olarak izlenir ve anormal DNS sorgu kal\u0131plar\u0131 incelenir. Bu sald\u0131r\u0131lar genellikle \u00e7ok fazla say\u0131da veya al\u0131\u015f\u0131lmad\u0131k uzunlukta DNS istekleri ile karakterize edilir.<\/li>\n\n\n\n<li><strong>Ara\u00e7lar<\/strong>: Cisco Umbrella, Palo Alto Networks, Zscaler.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DNS G\u00fcvenlik Duvar\u0131 (DNS Firewall)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNS g\u00fcvenlik duvarlar\u0131, DNS sorgular\u0131n\u0131 analiz ederek zararl\u0131 alan adlar\u0131na yap\u0131lan talepleri engeller. Ayr\u0131ca, k\u00f6t\u00fc niyetli IP adreslerine kar\u015f\u0131 kullan\u0131c\u0131lar\u0131 korur.<\/li>\n\n\n\n<li><strong>\u00d6rnek<\/strong>: Infoblox DNS Firewall, BlueCat DNS Edge.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DNS Trafik \u0130zleme ve Anomali Tespiti<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNS trafi\u011fini izleyen ve anormal davran\u0131\u015flar\u0131 tespit eden ara\u00e7lar, sald\u0131r\u0131lar\u0131n erken a\u015famalarda fark edilmesine yard\u0131mc\u0131 olabilir.<\/li>\n\n\n\n<li><strong>Ara\u00e7lar<\/strong>: SolarWinds DNS Monitoring, Splunk, ExtraHop Reveal(x).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Anycast DNS<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Anycast, DNS sunucular\u0131n\u0131n birden fazla fiziksel konumda ayn\u0131 IP adresine sahip olmas\u0131n\u0131 sa\u011flayarak trafi\u011fin en yak\u0131n sunucuya y\u00f6nlendirilmesini sa\u011flar. Bu, DNS DDoS sald\u0131r\u0131lar\u0131na kar\u015f\u0131 diren\u00e7 sa\u011flar ve kesintisiz hizmet sunar.<\/li>\n\n\n\n<li><strong>\u00d6rnek<\/strong>: Cloudflare DNS, Google DNS, Verisign DNS.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>G\u00fc\u00e7l\u00fc Kimlik Do\u011frulama ve Yetkilendirme<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Alan ad\u0131 kay\u0131tlar\u0131n\u0131 ve DNS ayarlar\u0131n\u0131 de\u011fi\u015ftiren ki\u015filerin g\u00fc\u00e7l\u00fc kimlik do\u011frulama y\u00f6ntemleri ile do\u011frulanmas\u0131 gerekir. \u0130ki fakt\u00f6rl\u00fc kimlik do\u011frulama (2FA) bu konuda \u00f6nemlidir.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DNS Yedeklili\u011fi<\/strong>:\n<ul class=\"wp-block-list\">\n<li>DNS sunucular\u0131nda yedekleme ve yedeklilik sa\u011flamak, sald\u0131r\u0131lara kar\u015f\u0131 dayan\u0131kl\u0131l\u0131\u011f\u0131 art\u0131r\u0131r. Bir DNS sunucusu devre d\u0131\u015f\u0131 kald\u0131\u011f\u0131nda di\u011fer sunucular hizmet vermeye devam eder.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>G\u00fcvenli DNS \u00c7\u00f6z\u00fcmleyiciler Kullanma<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Kullan\u0131c\u0131lar, g\u00fcvenli ve gizlilik dostu DNS \u00e7\u00f6z\u00fcmleyicileri (resolver) kullanarak g\u00fcvenliklerini art\u0131rabilir. Bu \u00e7\u00f6z\u00fcmleyiciler, DNS verilerini \u015fifreli hale getirerek DNS trafi\u011finin dinlenmesini \u00f6nler.<\/li>\n\n\n\n<li><strong>\u00d6rnek<\/strong>: Cloudflare 1.1.1.1, Quad9, Google DNS (8.8.8.8).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DNS over HTTPS (DoH) ve DNS over TLS (DoT)<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>DNS over HTTPS (DoH)<\/strong> ve <strong>DNS over TLS (DoT)<\/strong>, DNS sorgular\u0131n\u0131n \u015fifrelenerek internet \u00fczerinden iletilmesini sa\u011flar. Bu y\u00f6ntemler, DNS sorgular\u0131n\u0131n dinlenmesini ve de\u011fi\u015ftirilmesini \u00f6nler.<\/li>\n\n\n\n<li><strong>DoH Ara\u00e7lar\u0131<\/strong>: Firefox DoH, Cloudflare DoH.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">DNS G\u00fcvenli\u011fi \u0130\u00e7in En \u0130yi Uygulamalar<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DNSSEC kullan\u0131n<\/strong>: Alan ad\u0131n\u0131z i\u00e7in DNSSEC\u2019i etkinle\u015ftirerek DNS sorgular\u0131n\u0131n do\u011frulu\u011funu g\u00fcvence alt\u0131na al\u0131n.<\/li>\n\n\n\n<li><strong>G\u00fcncel DNS yaz\u0131l\u0131mlar\u0131 kullan\u0131n<\/strong>: DNS sunucular\u0131n\u0131zdaki yaz\u0131l\u0131mlar\u0131n her zaman g\u00fcncel oldu\u011fundan emin olun.<\/li>\n\n\n\n<li><strong>Yedekleme yap\u0131n<\/strong>: DNS hizmetinizde yedek sunucular ve co\u011frafi yedeklilik sa\u011flay\u0131n.<\/li>\n\n\n\n<li><strong>G\u00fcvenli DNS \u00e7\u00f6z\u00fcmleyicileri tercih edin<\/strong>: DoH ve DoT gibi \u015fifreleme tekniklerini destekleyen g\u00fcvenli DNS \u00e7\u00f6z\u00fcmleyiciler kullanarak gizlili\u011finizi ve g\u00fcvenli\u011finizi art\u0131r\u0131n.<\/li>\n\n\n\n<li><strong>DNS t\u00fcnelleme tespit ara\u00e7lar\u0131n\u0131 kullan\u0131n<\/strong>: DNS trafi\u011finizi d\u00fczenli olarak izleyin ve \u015f\u00fcpheli aktiviteleri an\u0131nda tespit edin.<\/li>\n\n\n\n<li><strong>Alan ad\u0131 g\u00fcvenli\u011fini art\u0131r\u0131n<\/strong>: Alan ad\u0131 kay\u0131tlar\u0131n\u0131za ve DNS y\u00f6netim aray\u00fczlerinize iki fakt\u00f6rl\u00fc kimlik do\u011frulama (2FA) gibi ekstra g\u00fcvenlik katmanlar\u0131 ekleyin.<\/li>\n<\/ul>\n\n\n\n<p>DNS g\u00fcvenli\u011fi, internetin genel g\u00fcvenli\u011fini sa\u011flamak a\u00e7\u0131s\u0131ndan hayati bir \u00f6neme sahiptir. Siber sald\u0131rganlar, DNS \u00fczerinden \u00e7e\u015fitli sald\u0131r\u0131lar d\u00fczenleyerek kritik verilere eri\u015febilir veya kullan\u0131c\u0131lar\u0131 yan\u0131ltabilir. Bu nedenle, DNS g\u00fcvenli\u011fini sa\u011flamaya y\u00f6nelik proaktif \u00e7\u00f6z\u00fcmler kullanmak ve d\u00fczenli g\u00fcvenlik g\u00fcncellemeleri yapmak, organizasyonlar i\u00e7in \u00f6nemli bir siber g\u00fcvenlik stratejisidir.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A\u011f i\u00e7inde ve\/veya d\u0131\u015f\u0131ndaki cihazlar, g\u00fcvenli\u011fi her zaman kontrol\u00fcn\u00fcz alt\u0131nda olmayabilen kar\u0131\u015f\u0131k, fiziksel ve bulut altyap\u0131s\u0131n\u0131 s\u00fcrekli olarak kullanmakta ve a\u011f\u0131n\u0131z s\u00fcrekli k\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131m tehditlerine maruz kalabilmektedir. K\u00f6t\u00fc ama\u00e7l\u0131 yaz\u0131l\u0131mlar\u0131n y\u00fczde&nbsp;90&#8217;dan&nbsp;fazlas\u0131, Komuta ve Kontrol sunucular\u0131 ile ileti\u015fim kurmak, veri \u00e7almak veya&nbsp;tarfi\u011fi k\u00f6t\u00fc ama\u00e7l\u0131 sitelere y\u00f6nlendirmek i\u00e7in DNS&#8217;i kullanmaktad\u0131r. DNS g\u00fcvenli\u011fi \u00e7\u00f6z\u00fcmleri ile DNS&#8217;i Komuta [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-582","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DNS G\u00fcvenli\u011fi - 7\/24 Buqnet Bilgisayar Yaz\u0131l\u0131m ve Donan\u0131m Hizmetleri<\/title>\n<meta name=\"description\" content=\"IT Dan\u0131\u015fmanl\u0131k Hizmetleri, Bilgisayar Dan\u0131\u015fmanl\u0131k, Bak\u0131m Anla\u015fmas\u0131, Bili\u015fim Dan\u0131\u015fmanl\u0131k Hizmetleri, Bilgisayar Servisi, Server Hizmet\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/buqnet.com.tr\/?page_id=582\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DNS G\u00fcvenli\u011fi - 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