{"id":476877,"date":"2023-08-09T09:04:34","date_gmt":"2023-08-09T09:04:34","guid":{"rendered":""},"modified":"2023-09-05T11:13:37","modified_gmt":"2023-09-05T11:13:37","slug":"dns-amplification-attack","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/tr\/wiki\/dns-amplification-attack\/","title":{"rendered":"DNS y\u00fckseltme sald\u0131r\u0131s\u0131"},"content":{"rendered":"<h2>girii\u015f<\/h2>\n<p>DNS (Alan Ad\u0131 Sistemi), alan adlar\u0131n\u0131 IP adreslerine \u00e7eviren ve kullan\u0131c\u0131lar\u0131n web sitelerine tan\u0131d\u0131k adlar\u0131yla eri\u015fmesine olanak tan\u0131yan, internet altyap\u0131s\u0131n\u0131n kritik bir bile\u015fenidir. DNS internetin temel ta\u015f\u0131 olarak hizmet verirken ayn\u0131 zamanda \u00e7e\u015fitli g\u00fcvenlik tehditlerine de a\u00e7\u0131kt\u0131r; bunlardan biri DNS amplifikasyon sald\u0131r\u0131s\u0131d\u0131r. Bu makalede DNS y\u00fckseltme sald\u0131r\u0131s\u0131n\u0131n ge\u00e7mi\u015fi, mekanizmas\u0131, t\u00fcrleri ve kar\u015f\u0131 \u00f6nlemleri ele al\u0131nmaktad\u0131r.<\/p>\n<h2>K\u00f6keni ve \u0130lk S\u00f6z\u00fc<\/h2>\n<p>DNS yans\u0131ma sald\u0131r\u0131s\u0131 olarak da bilinen DNS amplifikasyon sald\u0131r\u0131s\u0131 ilk olarak 2000&#039;li y\u0131llar\u0131n ba\u015f\u0131nda ortaya \u00e7\u0131kt\u0131. DDoS (Da\u011f\u0131t\u0131lm\u0131\u015f Hizmet Reddi) sald\u0131r\u0131lar\u0131n\u0131n etkisini art\u0131rmak i\u00e7in DNS sunucular\u0131ndan yararlanma tekni\u011finin &quot;Dale Drew&quot; adl\u0131 bir sald\u0131rgana atfedildi\u011fi belirtiliyor. 2002 y\u0131l\u0131nda Dale Drew, DNS altyap\u0131s\u0131n\u0131 kullanarak bir hedefi a\u015f\u0131r\u0131 trafikle doldurarak hizmet kesintisine neden olan bu t\u00fcr bir sald\u0131r\u0131y\u0131 g\u00f6sterdi.<\/p>\n<h2>DNS Amplifikasyon Sald\u0131r\u0131s\u0131 Hakk\u0131nda Detayl\u0131 Bilgi<\/h2>\n<p>DNS y\u00fckseltme sald\u0131r\u0131s\u0131, b\u00fcy\u00fck DNS sorgular\u0131na daha da b\u00fcy\u00fck yan\u0131tlarla yan\u0131t vermek i\u00e7in belirli DNS sunucular\u0131n\u0131n do\u011fal davran\u0131\u015f\u0131ndan yararlan\u0131r. Yaln\u0131zca kendi a\u011flar\u0131ndaki sorgulara yan\u0131t vermek yerine, herhangi bir kaynaktan gelen DNS sorgular\u0131n\u0131 kabul eden ve yan\u0131tlayan a\u00e7\u0131k DNS \u00e7\u00f6z\u00fcmleyicilerden yararlan\u0131r.<\/p>\n<h2>DNS Amplifikasyon Sald\u0131r\u0131s\u0131n\u0131n \u0130\u00e7 Yap\u0131s\u0131<\/h2>\n<p>DNS y\u00fckseltme sald\u0131r\u0131s\u0131 genellikle a\u015fa\u011f\u0131daki ad\u0131mlar\u0131 i\u00e7erir:<\/p>\n<ol>\n<li>\n<p><strong>Sahte Kaynak IP&#039;si:<\/strong> Sald\u0131rgan kaynak IP adresini taklit ederek kurban\u0131n IP adresi gibi g\u00f6r\u00fcnmesini sa\u011flar.<\/p>\n<\/li>\n<li>\n<p><strong>DNS Sorgusu:<\/strong> Sald\u0131rgan, a\u00e7\u0131k bir DNS \u00e7\u00f6z\u00fcmleyiciye belirli bir alan ad\u0131 i\u00e7in bir DNS sorgusu g\u00f6ndererek, iste\u011fin kurbandan geliyormu\u015f gibi g\u00f6r\u00fcnmesini sa\u011flar.<\/p>\n<\/li>\n<li>\n<p><strong>G\u00fc\u00e7lendirilmi\u015f Yan\u0131t:<\/strong> A\u00e7\u0131k DNS \u00e7\u00f6z\u00fcmleyici, iste\u011fin me\u015fru oldu\u011funu varsayarak \u00e7ok daha b\u00fcy\u00fck bir DNS yan\u0131t\u0131yla yan\u0131t verir. Bu yan\u0131t kurban\u0131n IP adresine g\u00f6nderilerek a\u011f kapasitesinin a\u015f\u0131lmas\u0131na neden olur.<\/p>\n<\/li>\n<li>\n<p><strong>DDoS Etkisi:<\/strong> \u00c7ok say\u0131da a\u00e7\u0131k DNS \u00e7\u00f6z\u00fcmleyicinin kurban\u0131n IP&#039;sine g\u00fc\u00e7lendirilmi\u015f yan\u0131tlar g\u00f6ndermesiyle, hedefin a\u011f\u0131 trafi\u011fe bo\u011fulur ve bu da hizmetin kesintiye u\u011framas\u0131na ve hatta hizmetin tamamen reddedilmesine yol a\u00e7ar.<\/p>\n<\/li>\n<\/ol>\n<h2>DNS Amplifikasyon Sald\u0131r\u0131s\u0131n\u0131n Temel \u00d6zellikleri<\/h2>\n<ul>\n<li>\n<p><strong>Amplifikasyon Fakt\u00f6r\u00fc:<\/strong> Amplifikasyon fakt\u00f6r\u00fc bu sald\u0131r\u0131n\u0131n \u00e7ok \u00f6nemli bir \u00f6zelli\u011fidir. DNS yan\u0131t\u0131n\u0131n boyutunun DNS sorgusunun boyutuna oran\u0131n\u0131 temsil eder. Amplifikasyon fakt\u00f6r\u00fc ne kadar y\u00fcksek olursa, sald\u0131r\u0131 o kadar fazla hasar verir.<\/p>\n<\/li>\n<li>\n<p><strong>Trafik Kayna\u011f\u0131 Sahtekarl\u0131\u011f\u0131:<\/strong> Sald\u0131rganlar, DNS sorgular\u0131nda kaynak IP adresini taklit ederek sald\u0131r\u0131n\u0131n ger\u00e7ek kayna\u011f\u0131n\u0131n izini s\u00fcrmeyi zorla\u015ft\u0131r\u0131r.<\/p>\n<\/li>\n<li>\n<p><strong>Refleks:<\/strong> Sald\u0131r\u0131, DNS \u00e7\u00f6z\u00fcmleyicilerini amplifikat\u00f6r olarak kullan\u0131yor ve kurbana y\u00f6nelik trafi\u011fi yans\u0131t\u0131yor ve g\u00fc\u00e7lendiriyor.<\/p>\n<\/li>\n<\/ul>\n<h2>DNS Amplifikasyon Sald\u0131r\u0131s\u0131 T\u00fcrleri<\/h2>\n<p>DNS y\u00fckseltme sald\u0131r\u0131lar\u0131, sald\u0131r\u0131 i\u00e7in kullan\u0131lan DNS kayd\u0131n\u0131n t\u00fcr\u00fcne g\u00f6re kategorize edilebilir. Yayg\u0131n t\u00fcrler \u015funlard\u0131r:<\/p>\n<table>\n<thead>\n<tr>\n<th>Sald\u0131r\u0131 T\u00fcr\u00fc<\/th>\n<th>Kullan\u0131lan DNS Kayd\u0131<\/th>\n<th>Amplifikasyon Fakt\u00f6r\u00fc<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Normal DNS<\/td>\n<td>A<\/td>\n<td>1-10x<\/td>\n<\/tr>\n<tr>\n<td>DNSSEC<\/td>\n<td>HERHANG\u0130<\/td>\n<td>20-30x<\/td>\n<\/tr>\n<tr>\n<td>EDNS0 ile DNSSEC<\/td>\n<td>HERHANG\u0130 B\u0130R + EDNS0<\/td>\n<td>100-200x<\/td>\n<\/tr>\n<tr>\n<td>Mevcut Olmayan Etki Alan\u0131<\/td>\n<td>HERHANG\u0130<\/td>\n<td>100-200x<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>DNS Y\u00fckseltme Sald\u0131r\u0131s\u0131n\u0131 Kullanma Yollar\u0131, Sorunlar ve \u00c7\u00f6z\u00fcmler<\/h2>\n<h3>DNS Amplifikasyon Sald\u0131r\u0131s\u0131n\u0131 Kullanma Yollar\u0131<\/h3>\n<ol>\n<li>\n<p><strong>DDoS Sald\u0131r\u0131lar\u0131:<\/strong> DNS amplifikasyon sald\u0131r\u0131lar\u0131n\u0131n birincil kullan\u0131m\u0131, belirli hedeflere kar\u015f\u0131 DDoS sald\u0131r\u0131lar\u0131 ba\u015flatmakt\u0131r. Bu sald\u0131r\u0131lar, hedefin altyap\u0131s\u0131n\u0131 a\u015f\u0131r\u0131 y\u00fckleyerek hizmetleri kesintiye u\u011fratmay\u0131 ve kesintiye neden olmay\u0131 ama\u00e7l\u0131yor.<\/p>\n<\/li>\n<li>\n<p><strong>IP Adresi Sahtekarl\u0131\u011f\u0131:<\/strong> Sald\u0131r\u0131, IP adresi sahtekarl\u0131\u011f\u0131ndan yararlanarak bir sald\u0131r\u0131n\u0131n ger\u00e7ek kayna\u011f\u0131n\u0131 gizlemek i\u00e7in kullan\u0131labilir, bu da savunucular\u0131n kayna\u011f\u0131 do\u011fru bir \u015fekilde izlemesini zorla\u015ft\u0131r\u0131r.<\/p>\n<\/li>\n<\/ol>\n<h3>Sorunlar ve \u00c7\u00f6z\u00fcmler<\/h3>\n<ul>\n<li>\n<p><strong>DNS \u00c7\u00f6z\u00fcmleyicileri a\u00e7\u0131n:<\/strong> As\u0131l sorun internette a\u00e7\u0131k DNS \u00e7\u00f6z\u00fcmleyicilerin varl\u0131\u011f\u0131d\u0131r. A\u011f y\u00f6neticileri, DNS sunucular\u0131n\u0131n g\u00fcvenli\u011fini sa\u011flamal\u0131 ve onlar\u0131 yaln\u0131zca kendi a\u011flar\u0131ndan gelen me\u015fru sorgulara yan\u0131t verecek \u015fekilde yap\u0131land\u0131rmal\u0131d\u0131r.<\/p>\n<\/li>\n<li>\n<p><strong>Paket Filtreleme:<\/strong> \u0130SS&#039;ler ve a\u011f y\u00f6neticileri, sahte kaynak IP&#039;lere sahip DNS sorgular\u0131n\u0131n a\u011flar\u0131ndan \u00e7\u0131kmas\u0131n\u0131 engellemek i\u00e7in paket filtreleme uygulayabilir.<\/p>\n<\/li>\n<li>\n<p><strong>DNS Yan\u0131t H\u0131z\u0131 S\u0131n\u0131rlamas\u0131 (DNS RRL):<\/strong> DNS RRL&#039;nin DNS sunucular\u0131na uygulanmas\u0131, belirli IP adreslerinden gelen sorgulara yan\u0131t verme h\u0131z\u0131n\u0131 s\u0131n\u0131rlayarak DNS y\u00fckseltme sald\u0131r\u0131lar\u0131n\u0131n etkisinin azalt\u0131lmas\u0131na yard\u0131mc\u0131 olabilir.<\/p>\n<\/li>\n<\/ul>\n<h2>Ana \u00d6zellikler ve Kar\u015f\u0131la\u015ft\u0131rmalar<\/h2>\n<table>\n<thead>\n<tr>\n<th>karakteristik<\/th>\n<th>DNS Geni\u015fletme Sald\u0131r\u0131s\u0131<\/th>\n<th>DNS Sahtekarl\u0131\u011f\u0131 Sald\u0131r\u0131s\u0131<\/th>\n<th>DNS \u00d6nbellek Zehirlenmesi<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ama\u00e7<\/td>\n<td>DDoS<\/td>\n<td>Veri Manip\u00fclasyonu<\/td>\n<td>Veri Manip\u00fclasyonu<\/td>\n<\/tr>\n<tr>\n<td>Sald\u0131r\u0131 T\u00fcr\u00fc<\/td>\n<td>Yans\u0131ma Tabanl\u0131<\/td>\n<td>Ortadaki adam<\/td>\n<td>Enjeksiyon Tabanl\u0131<\/td>\n<\/tr>\n<tr>\n<td>Amplifikasyon Fakt\u00f6r\u00fc<\/td>\n<td>Y\u00fcksek<\/td>\n<td>D\u00fc\u015f\u00fck<\/td>\n<td>Hi\u00e7biri<\/td>\n<\/tr>\n<tr>\n<td>Risk seviyesi<\/td>\n<td>Y\u00fcksek<\/td>\n<td>Orta<\/td>\n<td>Orta<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Perspektifler ve Gelece\u011fin Teknolojileri<\/h2>\n<p>DNS y\u00fckseltme sald\u0131r\u0131lar\u0131na kar\u015f\u0131 m\u00fccadele, ara\u015ft\u0131rmac\u0131lar\u0131n ve siber g\u00fcvenlik uzmanlar\u0131n\u0131n s\u00fcrekli olarak yeni sald\u0131r\u0131 azaltma teknikleri geli\u015ftirmesiyle geli\u015fmeye devam ediyor. Gelecekteki teknolojiler \u015funlar\u0131 i\u00e7erebilir:<\/p>\n<ul>\n<li>\n<p><strong>Makine \u00d6\u011frenimi Tabanl\u0131 Savunmalar:<\/strong> DNS y\u00fckseltme sald\u0131r\u0131lar\u0131n\u0131 ger\u00e7ek zamanl\u0131 olarak tespit etmek ve azaltmak i\u00e7in makine \u00f6\u011frenimi algoritmalar\u0131n\u0131 kullanma.<\/p>\n<\/li>\n<li>\n<p><strong>DNSSEC Uygulamas\u0131:<\/strong> DNSSEC&#039;nin (Etki Alan\u0131 Ad\u0131 Sistemi G\u00fcvenlik Uzant\u0131lar\u0131) yayg\u0131n \u015fekilde benimsenmesi, HERHANG\u0130 bir kay\u0131ttan yararlanan DNS y\u00fckseltme sald\u0131r\u0131lar\u0131n\u0131n \u00f6nlenmesine yard\u0131mc\u0131 olabilir.<\/p>\n<\/li>\n<\/ul>\n<h2>Proxy Sunucular\u0131 ve DNS Amplifikasyon Sald\u0131r\u0131s\u0131<\/h2>\n<p>OneProxy taraf\u0131ndan sa\u011flananlar da dahil olmak \u00fczere proxy sunucular\u0131, yanl\u0131\u015f yap\u0131land\u0131r\u0131l\u0131rsa veya herhangi bir kaynaktan gelen DNS trafi\u011fine izin verirse, yanl\u0131\u015fl\u0131kla DNS y\u00fckseltme sald\u0131r\u0131lar\u0131n\u0131n par\u00e7as\u0131 haline gelebilir. Proxy sunucu sa\u011flay\u0131c\u0131lar\u0131, sunucular\u0131n\u0131n g\u00fcvenli\u011fini sa\u011flayacak ve bu t\u00fcr sald\u0131r\u0131lara kat\u0131lmalar\u0131n\u0131 engelleyecek ad\u0131mlar atmal\u0131d\u0131r.<\/p>\n<h2>\u0130lgili Ba\u011flant\u0131lar<\/h2>\n<p>DNS y\u00fckseltme sald\u0131r\u0131lar\u0131 hakk\u0131nda daha fazla bilgi i\u00e7in a\u015fa\u011f\u0131daki kaynaklar\u0131 incelemeyi d\u00fc\u015f\u00fcn\u00fcn:<\/p>\n<ol>\n<li><a href=\"https:\/\/us-cert.cisa.gov\/ncas\/alerts\/TA13-088A\" target=\"_new\" rel=\"noopener nofollow\">US-CERT Uyar\u0131s\u0131 (TA13-088A): DNS Y\u00fckseltme Sald\u0131r\u0131lar\u0131<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc5358\" target=\"_new\" rel=\"noopener nofollow\">RFC 5358 \u2013 Reflekt\u00f6r Sald\u0131r\u0131lar\u0131nda \u00d6zyinelemeli DNS Sunucular\u0131n\u0131n Kullan\u0131m\u0131n\u0131n \u00d6nlenmesi<\/a><\/li>\n<li><a href=\"https:\/\/www.akamai.com\/us\/en\/multimedia\/documents\/white-paper\/dns-amplification-attacks-and-response-policy-zones-wp.pdf\" target=\"_new\" rel=\"noopener nofollow\">DNS Geni\u015fletme Sald\u0131r\u0131lar\u0131 ve Yan\u0131t Politikas\u0131 B\u00f6lgeleri (RPZ)<\/a><\/li>\n<\/ol>\n<p>DNS y\u00fckseltme sald\u0131r\u0131lar\u0131 gibi siber tehditlerle m\u00fccadelede bilgi ve fark\u0131ndal\u0131\u011f\u0131n \u00e7ok \u00f6nemli oldu\u011funu unutmay\u0131n. Bu potansiyel tehlikelere kar\u015f\u0131 korunmak i\u00e7in bilgili kal\u0131n, dikkatli olun ve internet altyap\u0131n\u0131z\u0131 g\u00fcvence alt\u0131na al\u0131n.<\/p>","protected":false},"featured_media":476878,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476877","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>DNS Amplification Attack: Unveiling the Threat<\/mark>","faq_items":[{"question":"What is a DNS amplification attack?","answer":"<p>A DNS amplification attack is a type of cyber threat that exploits open DNS resolvers to flood a target's network with overwhelming traffic. The attacker sends DNS queries with forged source IP addresses to these open resolvers, which then respond with much larger DNS responses, amplifying the traffic directed towards the victim. This can lead to a Distributed Denial of Service (DDoS) situation, disrupting the target's services.<\/p>"},{"question":"How did DNS amplification attacks originate?","answer":"<p>The first mention of DNS amplification attacks can be traced back to the early 2000s, with an attacker named \"Dale Drew\" demonstrating this technique. By leveraging open DNS resolvers, he showcased how attackers could magnify the impact of DDoS attacks, causing service disruptions.<\/p>"},{"question":"How does a DNS amplification attack work?","answer":"<p>The internal structure of a DNS amplification attack involves several steps. First, the attacker spoofs their source IP address to make it appear as the victim's IP. Then, they send DNS queries to open DNS resolvers, making it seem like the requests are coming from the victim. The open resolvers, assuming the requests are legitimate, respond with larger DNS responses, which flood the victim's network, causing a DDoS effect.<\/p>"},{"question":"What are the key features of DNS amplification attacks?","answer":"<p>The key features of DNS amplification attacks include the amplification factor, which represents the ratio of DNS response size to query size. Additionally, traffic source spoofing is used to hide the true origin of the attack. Reflection is also a crucial aspect, as open DNS resolvers amplify the attack traffic towards the victim.<\/p>"},{"question":"What types of DNS amplification attacks exist?","answer":"<p>DNS amplification attacks can be categorized based on the type of DNS record used for the attack. Common types include Regular DNS, DNSSEC, DNSSEC with EDNS0, and Non-Existent Domain attacks. Each type varies in its amplification factor and potential impact on the target.<\/p>"},{"question":"How can DNS amplification attacks be used, and what are the problems and solutions?","answer":"<p>DNS amplification attacks are primarily used to launch DDoS attacks, causing service disruptions. The main problem lies in the existence of open DNS resolvers, which attackers exploit. Solutions include securing DNS servers, implementing packet filtering, and using DNS Response Rate Limiting (DNS RRL).<\/p>"},{"question":"How does DNS amplification attack compare with other DNS-related threats?","answer":"<p>DNS amplification attacks differ from DNS spoofing attacks and DNS cache poisoning. While DNS amplification aims for DDoS, DNS spoofing manipulates data and DNS cache poisoning injects false data into DNS caches.<\/p>"},{"question":"What are the future perspectives and technologies related to DNS amplification attacks?","answer":"<p>The future holds promising technologies, such as machine learning-based defenses and wider adoption of DNSSEC, to mitigate DNS amplification attacks effectively.<\/p>"},{"question":"How are proxy servers associated with DNS amplification attacks?","answer":"<p>Proxy servers, like those provided by OneProxy, may inadvertently be part of DNS amplification attacks if misconfigured or allowing DNS traffic from any source. OneProxy ensures secure servers, preventing such risks.<\/p>"},{"question":"Where can I find more information about DNS amplification attacks?","answer":"<p>For further information, you can explore the following resources:<\/p><ol><li><a href=\"https:\/\/us-cert.cisa.gov\/ncas\/alerts\/TA13-088A\" target=\"_new\">US-CERT Alert (TA13-088A): DNS Amplification Attacks<\/a><\/li><li><a href=\"https:\/\/tools.ietf.org\/html\/rfc5358\" target=\"_new\">RFC 5358 - Preventing Use of Recursive DNS Servers in Reflector Attacks<\/a><\/li><li><a href=\"https:\/\/www.akamai.com\/us\/en\/multimedia\/documents\/white-paper\/dns-amplification-attacks-and-response-policy-zones-wp.pdf\" target=\"_new\">DNS Amplification Attacks and Response Policy Zones (RPZ)<\/a><\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/wiki\/476877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/wiki\/476877\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/media\/476878"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/tr\/wp-json\/wp\/v2\/media?parent=476877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}