{"id":2887,"date":"2026-10-16T15:00:00","date_gmt":"2026-10-16T12:00:00","guid":{"rendered":"https:\/\/narhost.com\/destek\/?p=2887"},"modified":"2026-10-16T15:00:00","modified_gmt":"2026-10-16T12:00:00","slug":"err-quic-protocol-error-hatasi","status":"publish","type":"post","link":"https:\/\/narhost.com\/destek\/err-quic-protocol-error-hatasi\/","title":{"rendered":"ERR_QUIC_PROTOCOL_ERROR Hatas\u0131 Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr"},"content":{"rendered":"<p class=\"kb-dogrulama\">Son g\u00f6zden ge\u00e7irme: Ekim 2026 \u00b7 QUIC ve HTTP\/3 standartlar\u0131 (RFC 9000, RFC 9114) ile Google Chrome yard\u0131m belgelerine g\u00f6re<\/p>\n<div id=\"hizli-cozum\" class=\"ai-box ai-box--cozum\">\n<p class=\"ai-box-title\">H\u0131zl\u0131 \u00e7\u00f6z\u00fcm<\/p>\n<p><code>ERR_QUIC_PROTOCOL_ERROR<\/code> (aramalarda ERR QUIC PROTOCOL ERROR olarak da yaz\u0131l\u0131r), Chrome&#8217;un siteye QUIC \u00fczerinden kurdu\u011fu HTTP\/3 ba\u011flant\u0131s\u0131n\u0131n yar\u0131da kesildi\u011fini g\u00f6sterir. Neden \u00e7o\u011fu zaman UDP trafi\u011fini kesen bir g\u00fcvenlik yaz\u0131l\u0131m\u0131, VPN ya da a\u011f cihaz\u0131d\u0131r.<\/p>\n<ol>\n<li>Sayfay\u0131 gizli pencerede ve ba\u015fka bir a\u011fda (mobil veri) a\u00e7may\u0131 deneyin.<\/li>\n<li>Antivir\u00fcs\u00fcn web korumas\u0131n\u0131, g\u00fcvenlik duvar\u0131n\u0131 ve VPN&#8217;i ge\u00e7ici olarak kapat\u0131n.<\/li>\n<li>Adres \u00e7ubu\u011funa <code>chrome:\/\/flags\/#enable-quic<\/code> yaz\u0131p ayar\u0131 <strong>Disabled<\/strong> yap\u0131n ve taray\u0131c\u0131y\u0131 yeniden ba\u015flat\u0131n.<\/li>\n<li>Hata her ziyaret\u00e7ide \u00e7\u0131k\u0131yorsa CDN ve sunucu g\u00fcvenlik duvar\u0131ndaki HTTP\/3 ayar\u0131n\u0131 kontrol edin.<\/li>\n<\/ol>\n<\/div>\n<table class=\"kb-uyg\">\n<tr>\n<th>Panel<\/th>\n<td>Taray\u0131c\u0131 (Chrome, Edge, Opera); site sahibi i\u00e7in CDN paneli ya da sunucu<\/td>\n<\/tr>\n<tr>\n<th>Sistem<\/th>\n<td>Windows, macOS, Android; payla\u015f\u0131ml\u0131 hosting ve VPS<\/td>\n<\/tr>\n<tr>\n<th>Yetki<\/th>\n<td>Ziyaret\u00e7i; site sahibi i\u00e7in CDN hesab\u0131 ya da sunucu y\u00f6neticisi<\/td>\n<\/tr>\n<tr>\n<th>Narhost \u00fcr\u00fcn\u00fc<\/th>\n<td><a href=\"https:\/\/narhost.com\/web-hosting\" title=\"Narhost Web Hosting paketleri\">Web Hosting<\/a><\/td>\n<\/tr>\n<\/table>\n<div class=\"kb-once\">\n<p class=\"label\">Ba\u015flamadan \u00f6nce<\/p>\n<ul>\n<li>Hatan\u0131n yaln\u0131z bir sitede mi yoksa bir\u00e7ok sitede mi \u00e7\u0131kt\u0131\u011f\u0131n\u0131 not edin. Bir\u00e7ok sitede \u00e7\u0131k\u0131yorsa neden sizin cihaz\u0131n\u0131z ya da a\u011f\u0131n\u0131zd\u0131r.<\/li>\n<li>\u0130\u015f yeri a\u011f\u0131ndaysan\u0131z g\u00fcvenlik duvar\u0131n\u0131n UDP 443 trafi\u011fini engelleyip engellemedi\u011fini BT ekibine sorun.<\/li>\n<li>Site sahibiyseniz sitenin bir CDN arkas\u0131nda olup olmad\u0131\u011f\u0131n\u0131 ve HTTP\/3&#8217;\u00fcn a\u00e7\u0131k olup olmad\u0131\u011f\u0131n\u0131 \u00f6\u011frenin.<\/li>\n<\/ul>\n<\/div>\n<h2>ERR QUIC PROTOCOL ERROR neden olur<\/h2>\n<p>QUIC, UDP \u00fczerinde \u00e7al\u0131\u015fan bir ta\u015f\u0131ma protokol\u00fcd\u00fcr ve <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc9000\" title=\"RFC 9000 \u2014 QUIC ta\u015f\u0131ma protokol\u00fc standard\u0131\" target=\"_blank\" rel=\"noopener\">RFC 9000<\/a> ile standartla\u015fm\u0131\u015ft\u0131r. HTTP\/3 bu protokol\u00fcn \u00fcst\u00fcnde \u00e7al\u0131\u015f\u0131r (<a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc9114\" title=\"RFC 9114 \u2014 HTTP\/3 protokol standard\u0131\" target=\"_blank\" rel=\"noopener\">RFC 9114<\/a>). Sunucu ya da CDN HTTP\/3 sundu\u011funu bildirdi\u011finde Chrome, siteye klasik TCP ba\u011flant\u0131s\u0131 yerine UDP 443 portu \u00fczerinden QUIC ile ba\u011flanmay\u0131 dener.<\/p>\n<p>Ba\u011flant\u0131 kurulduktan sonra aradaki bir cihaz UDP paketlerini d\u00fc\u015f\u00fcr\u00fcr, de\u011fi\u015ftirir ya da oturumu keserse taray\u0131c\u0131 protokol hatas\u0131 al\u0131r ve sayfay\u0131 g\u00f6steremez. En s\u0131k nedenler: HTTPS trafi\u011fini tarayan antivir\u00fcs yaz\u0131l\u0131mlar\u0131, UDP&#8217;yi engelleyen i\u015f yeri g\u00fcvenlik duvarlar\u0131, baz\u0131 VPN istemcileri, taray\u0131c\u0131 uzant\u0131lar\u0131 ve eski taray\u0131c\u0131 s\u00fcr\u00fcm\u00fc. Site taraf\u0131nda ise HTTP\/3 a\u00e7\u0131k oldu\u011fu h\u00e2lde UDP 443 portu sunucu g\u00fcvenlik duvar\u0131nda kapal\u0131 kalabilir.<\/p>\n<figure class=\"nh-sema\"><img src=\"https:\/\/narhost.com\/destek\/wp-content\/uploads\/2026\/10\/err-quic-protocol-error-hatasi-sema-narhost.webp\" alt=\"err quic protocol error te\u015fhis \u015femas\u0131 \u2014 gizli pencere, ba\u015fka a\u011f, QUIC ayar\u0131 ve CDN kontrol\u00fc\" width=\"1200\" height=\"500\" loading=\"lazy\" decoding=\"async\"><figcaption>Ba\u015fka a\u011fda a\u00e7\u0131lan sayfa, UDP trafi\u011finin sizin a\u011f\u0131n\u0131zda kesildi\u011fini g\u00f6sterir.<\/figcaption><\/figure>\n<h2>Ziyaret\u00e7iyseniz ad\u0131m ad\u0131m \u00e7\u00f6z\u00fcm<\/h2>\n<ol class=\"kb-adimlar\">\n<li><strong>Gizli pencerede ve ba\u015fka a\u011fda deneyin.<\/strong> Chrome&#8217;da <code>Ctrl + Shift + N<\/code> ile gizli pencere a\u00e7\u0131n. Ard\u0131ndan ayn\u0131 adresi telefonunuzun mobil verisiyle a\u00e7\u0131n.\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: gizli pencerede a\u00e7\u0131l\u0131yorsa neden uzant\u0131d\u0131r; yaln\u0131z mobil veride a\u00e7\u0131l\u0131yorsa neden a\u011f\u0131n\u0131zdaki modem ya da g\u00fcvenlik duvar\u0131d\u0131r.<\/p>\n<\/li>\n<li><strong>G\u00fcvenlik yaz\u0131l\u0131m\u0131n\u0131 ve VPN&#8217;i ge\u00e7ici kapat\u0131n.<\/strong> Antivir\u00fcs program\u0131ndaki &#8220;web korumas\u0131&#8221;, &#8220;HTTPS tarama&#8221; ya da &#8220;a\u011f kalkan\u0131&#8221; \u00f6zelli\u011fini kapat\u0131p sayfay\u0131 yenileyin. Sorun buysa \u00f6zelli\u011fi a\u00e7\u0131n ve siteyi istisna listesine ekleyin.<\/li>\n<li><strong>Chrome&#8217;da QUIC&#8217;i kapat\u0131n.<\/strong> Adres \u00e7ubu\u011funa <code>chrome:\/\/flags\/#enable-quic<\/code> yaz\u0131n. &#8220;Experimental QUIC protocol&#8221; sat\u0131r\u0131n\u0131 <strong>Disabled<\/strong> yap\u0131n ve altta \u00e7\u0131kan <strong>Relaunch<\/strong> d\u00fc\u011fmesine bas\u0131n.\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: taray\u0131c\u0131 siteye HTTP\/2 ile ba\u011flan\u0131r ve sayfa a\u00e7\u0131l\u0131r. Bu ayar b\u00fct\u00fcn siteler i\u00e7in ge\u00e7erlidir; a\u011f sorunu \u00e7\u00f6z\u00fcld\u00fc\u011f\u00fcnde yeniden <strong>Default<\/strong> yap\u0131n.<\/p>\n<\/li>\n<li><strong>\u00d6nbelle\u011fi temizleyin ve taray\u0131c\u0131y\u0131 g\u00fcncelleyin.<\/strong><code>Ctrl + Shift + Delete<\/code> ile \u00f6nbelle\u011fe al\u0131nan dosyalar\u0131 silin, ard\u0131ndan <code>chrome:\/\/settings\/help<\/code> sayfas\u0131ndan g\u00fcncellemeyi ba\u015flat\u0131n. \u00d6nbellek temizlemenin resm\u00ee anlat\u0131m\u0131 <a href=\"https:\/\/support.google.com\/chrome\/answer\/2392709\" title=\"Google Chrome Yard\u0131m \u2014 \u00f6nbelle\u011fi ve \u00e7erezleri temizleme\" target=\"_blank\" rel=\"noopener\">Chrome yard\u0131m sayfas\u0131nda<\/a>.<\/li>\n<li><strong>Modemi yeniden ba\u015flat\u0131n.<\/strong> Modemi 30 saniye kapal\u0131 tutup a\u00e7\u0131n. Baz\u0131 modemlerin g\u00fcvenlik \u00f6zellikleri UDP oturumlar\u0131n\u0131 erken kapat\u0131r.<\/li>\n<\/ol>\n<h2>Site sahibiyseniz bak\u0131lacak yerler<\/h2>\n<ol class=\"kb-adimlar\">\n<li><strong>Hatan\u0131n kayna\u011f\u0131n\u0131 ay\u0131r\u0131n.<\/strong> Sayfay\u0131 a\u00e7\u0131p <code>F12<\/code> ile geli\u015ftirici ara\u00e7lar\u0131n\u0131 a\u00e7\u0131n, A\u011f sekmesinde s\u00fctun ba\u015fl\u0131\u011f\u0131na sa\u011f t\u0131klay\u0131p <strong>Protocol<\/strong> s\u00fctununu ekleyin. <code>h3<\/code> g\u00f6r\u00fcnen isteklerde hata \u00e7\u0131k\u0131yorsa sorun HTTP\/3 yolundad\u0131r.<\/li>\n<li><strong>CDN kullan\u0131yorsan\u0131z HTTP\/3&#8217;\u00fc ge\u00e7ici kapat\u0131n.<\/strong> Cloudflare&#8217;de ayar <strong>Speed \u2192 Protocol Optimization<\/strong> alt\u0131nda &#8220;HTTP\/3 (with QUIC)&#8221; ad\u0131yla durur; ayr\u0131nt\u0131 <a href=\"https:\/\/developers.cloudflare.com\/speed\/optimization\/protocol\/http3\/\" title=\"Cloudflare belgesi \u2014 HTTP\/3 (with QUIC) ayar\u0131\" target=\"_blank\" rel=\"noopener\">Cloudflare belgesinde<\/a>. Kapatt\u0131ktan sonra hata kayboluyorsa sorun CDN ile ziyaret\u00e7i aras\u0131ndaki UDP yolundad\u0131r.<\/li>\n<li><strong>VPS&#8217;te UDP 443 portunu kontrol edin.<\/strong> Sunucunuz HTTP\/3 sunuyorsa g\u00fcvenlik duvar\u0131nda yaln\u0131z TCP 443 de\u011fil UDP 443 de a\u00e7\u0131k olmal\u0131d\u0131r. Ubuntu&#8217;da UFW kullan\u0131yorsan\u0131z kural \u015f\u00f6yledir:\n<pre><code class=\"language-bash\">sudo ufw allow 443\/udp\nsudo ufw status<\/code><\/pre>\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: listede <code>443\/udp ALLOW<\/code> sat\u0131r\u0131 g\u00f6r\u00fcn\u00fcr.<\/p>\n<\/li>\n<li><strong>Son de\u011fi\u015fikli\u011fi geri al\u0131n.<\/strong> Hata bir g\u00fcvenlik eklentisi, yeni bir CDN kural\u0131 ya da sunucu g\u00fcncellemesinden sonra ba\u015flad\u0131ysa o de\u011fi\u015fikli\u011fi geri al\u0131p yeniden deneyin.<\/li>\n<\/ol>\n<h2>Do\u011frulama<\/h2>\n<div class=\"success-box\">\n<p class=\"label\">Sonu\u00e7<\/p>\n<p>Sayfay\u0131 normal pencerede a\u00e7\u0131n ve A\u011f sekmesinde yenileyin. B\u00fct\u00fcn istekler <code>200<\/code> ya da <code>304<\/code> durumuyla d\u00f6n\u00fcyor, Protocol s\u00fctununda <code>h3<\/code> ya da <code>h2<\/code> g\u00f6r\u00fcn\u00fcyor ve k\u0131rm\u0131z\u0131 sat\u0131r kalm\u0131yorsa sorun giderilmi\u015ftir.<\/p>\n<\/div>\n<h2>H\u00e2l\u00e2 \u00e7\u00f6z\u00fclmediyse<\/h2>\n<ul>\n<li><strong>Ba\u011flant\u0131 hi\u00e7 kurulam\u0131yor.<\/strong> Taray\u0131c\u0131 farkl\u0131 bir hata g\u00f6steriyorsa <a href=\"https:\/\/narhost.com\/destek\/err-connection-reset-hatasi\/\" title=\"ERR_CONNECTION_RESET Hatas\u0131 Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr \u2014 Narhost Destek Merkezi\">ERR_CONNECTION_RESET hatas\u0131<\/a> kart\u0131ndaki ad\u0131mlar ge\u00e7erlidir.<\/li>\n<li><strong>Hata HTTP\/2&#8217;de de s\u00fcr\u00fcyor.<\/strong> QUIC kapal\u0131yken ayn\u0131 sayfa kesiliyorsa neden protokol de\u011fil yan\u0131t\u0131n kendisidir; <a href=\"https:\/\/narhost.com\/destek\/err-http2-protocol-error-hatasi\/\" title=\"ERR_HTTP2_PROTOCOL_ERROR Hatas\u0131 Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr \u2014 Narhost Destek Merkezi\">ERR_HTTP2_PROTOCOL_ERROR hatas\u0131<\/a> kart\u0131na bak\u0131n.<\/li>\n<li><strong>Sayfa uzun s\u00fcre bekleyip d\u00fc\u015f\u00fcyor.<\/strong> Sunucuya hi\u00e7 ula\u015f\u0131lam\u0131yordur; <a href=\"https:\/\/narhost.com\/destek\/err-connection-timed-out-hatasi-nasil-cozulur\/\" title=\"ERR_CONNECTION_TIMED_OUT Hatas\u0131 Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr \u2014 Narhost Destek Merkezi\">ERR_CONNECTION_TIMED_OUT hatas\u0131<\/a> kart\u0131ndaki a\u011f testlerini yap\u0131n.<\/li>\n<\/ul>\n<div class=\"cta-box\">\n<p class=\"label\">Narhost deste\u011fi<\/p>\n<p>Talebe \u015funlar\u0131 ekleyin: alan ad\u0131, hatan\u0131n \u00e7\u0131kt\u0131\u011f\u0131 sayfan\u0131n tam adresi, tarih ve saat, hatan\u0131n ba\u015fka a\u011fda ve gizli pencerede \u00e7\u0131k\u0131p \u00e7\u0131kmad\u0131\u011f\u0131, sitenin CDN arkas\u0131nda olup olmad\u0131\u011f\u0131.<\/p>\n<p><a class=\"cta-btn\" href=\"https:\/\/narhost.com\/submitticket.php\" title=\"Narhost destek talebi a\u00e7\">Destek talebi a\u00e7<\/a><\/div>\n<div class=\"kb-ilgili\">\n<p class=\"label\">Sonraki ad\u0131mlar<\/p>\n<ul>\n<li><a href=\"https:\/\/narhost.com\/destek\/site-bazen-acilmiyorsa-ne-yapilmali\/\" title=\"Site A\u00e7\u0131lm\u0131yor, Ad\u0131m Ad\u0131m Te\u015fhis Rehberi \u2014 Narhost Destek Merkezi\">Site a\u00e7\u0131lm\u0131yor, ad\u0131m ad\u0131m te\u015fhis rehberi<\/a><\/li>\n<li><a href=\"https:\/\/narhost.com\/destek\/err-empty-response-hatasi-nasil-cozulur\/\" title=\"ERR_EMPTY_RESPONSE Hatas\u0131 Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr \u2014 Narhost Destek Merkezi\">ERR_EMPTY_RESPONSE hatas\u0131<\/a><\/li>\n<li><a href=\"https:\/\/narhost.com\/destek\/cloudflare-520-hatasi-nasil-cozulur\/\" title=\"Cloudflare 520 Hatas\u0131 Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr \u2014 Narhost Destek Merkezi\">Cloudflare 520 hatas\u0131<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"kb-faq\">\n<h2>S\u0131k\u00e7a sorulan sorular<\/h2>\n<h3>ERR_QUIC_PROTOCOL_ERROR ne demek?<\/h3>\n<p>Chrome&#8217;un siteye QUIC protokol\u00fcyle, yani HTTP\/3 \u00fczerinden kurdu\u011fu ba\u011flant\u0131n\u0131n kurallara ayk\u0131r\u0131 bi\u00e7imde kesildi\u011fini g\u00f6sterir. Site kapal\u0131 demek de\u011fildir; ayn\u0131 sayfa ba\u015fka a\u011fda ya da QUIC kapal\u0131yken \u00e7o\u011fu zaman a\u00e7\u0131l\u0131r.<\/p>\n<h3>QUIC&#8217;i kapatmak ba\u011flant\u0131m\u0131 yava\u015flat\u0131r m\u0131?<\/h3>\n<p>Fark \u00e7o\u011fu kullan\u0131c\u0131da hissedilmez. Taray\u0131c\u0131 HTTP\/2 ile ba\u011flanmaya devam eder; yaln\u0131z kay\u0131pl\u0131 mobil a\u011flarda ilk ba\u011flant\u0131 biraz daha uzun s\u00fcrebilir. A\u011f sorunu giderildi\u011finde ayar\u0131 varsay\u0131lana d\u00f6nd\u00fcrmeniz yeterlidir.<\/p>\n<h3>Hata yaln\u0131z i\u015f yerinde \u00e7\u0131k\u0131yor, neden?<\/h3>\n<p>Kurumsal g\u00fcvenlik duvarlar\u0131n\u0131n bir k\u0131sm\u0131 UDP 443 trafi\u011fini denetleyemedi\u011fi i\u00e7in engeller ya da yar\u0131da keser. Bu durumda bilgisayar\u0131n\u0131zda de\u011fil a\u011f cihaz\u0131nda ayar gerekir; BT ekibinden UDP 443 kural\u0131n\u0131 kontrol etmesini isteyin.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>ERR_QUIC_PROTOCOL_ERROR hatas\u0131n\u0131n nedenleri ve \u00e7\u00f6z\u00fcm\u00fc: gizli pencere ve ba\u015fka a\u011f testi, antivir\u00fcs ve VPN kontrol\u00fc, Chrome&#8217;da QUIC&#8217;i kapatma; site sahibi i\u00e7in CDN HTTP\/3 ayar\u0131 ve UDP 443 portu.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[305,306,307],"class_list":["post-2887","post","type-post","status-publish","format-standard","hentry","category-web-hosting","tag-tarayici-hatasi","tag-chrome","tag-http3"],"meta_box":[],"_links":{"self":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2887","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/comments?post=2887"}],"version-history":[{"count":1,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2887\/revisions"}],"predecessor-version":[{"id":3020,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2887\/revisions\/3020"}],"wp:attachment":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/media?parent=2887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/categories?post=2887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/tags?post=2887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}