{"id":35100,"date":"2020-03-20T05:11:28","date_gmt":"2020-03-20T12:11:28","guid":{"rendered":"https:\/\/kinqsta.com\/?post_type=knowledgebase&#038;p=44928"},"modified":"2025-10-01T20:04:42","modified_gmt":"2025-10-01T20:04:42","slug":"fixar-error-521","status":"publish","type":"post","link":"https:\/\/kinqsta.com\/se\/blog\/fixar-error-521\/","title":{"rendered":"S\u00e5 h\u00e4r fixar du Fel 521 med WordPress och Cloudflare"},"content":{"rendered":"<p>Fel 521 \u00e4r ett Cloudflare-specifikt felmeddelande (som <a href=\"https:\/\/kinqsta.com\/se\/blog\/fel-520\/\">fel 520<\/a>) som visas n\u00e4r din WordPress-webbplats server avvisar en anslutning till Cloudflare.<\/p>\n<p>I det h\u00e4r inl\u00e4gget l\u00e4r du dig:<\/p>\n<ul>\n<li><a href=\"#what\">Mer om vad Fel 521-meddelandet \u00e4r<\/a><\/li>\n<li><a href=\"#cause\">Vad orsakar Fel 521-meddelandet<\/a><\/li>\n<li><a href=\"#fix\">S\u00e5 h\u00e4r fixar du Fel 521 f\u00f6r Cloudflare och WordPress<\/a><\/li>\n<\/ul>\n<h2><a id=\"what\"><\/a>Vad \u00e4r Fel 521 Webbservern \u00e4r nere?<\/h2>\n<p>Som du l\u00e4rde dig ovan \u00e4r felmeddelandet 521 ett felmeddelande som \u00e4r specifikt f\u00f6r Cloudflare.<\/p>\n<p>I princip betyder det att din webbl\u00e4sare lyckades ansluta till Cloudflare, men Cloudflare kunde inte ansluta till den ursprungliga webbservern \u2013 allts\u00e5 WordPress-webbplatsens server.<\/p>\n<p>Mer specifikt f\u00f6rs\u00f6kte Cloudflare ansluta till din WordPress-webbplats server men fick ett <a href=\"https:\/\/kinqsta.com\/se\/blog\/ssh-anslutning-nekad\/\">Anslutning v\u00e4grad-fel<\/a> som svar.<\/p>\n<p>Eftersom Cloudflare inte kan ansluta till din webbplats kan det inte visa din webbplats f\u00f6r bes\u00f6kare och visar felmeddelandet 521 ist\u00e4llet:<\/p>\n<figure style=\"width: 1439px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/se\/wp-content\/uploads\/sites\/9\/2019\/05\/ett-exempel-fel-521-meddelande.png\" alt=\"Ett exempel p\u00e5 Fel 521-meddelande\" width=\"1439\" height=\"874\"><figcaption class=\"wp-caption-text\">Ett exempel p\u00e5 Fel 521-meddelande<\/figcaption><\/figure>\n<h3><a id=\"cause\"><\/a>Vad orsakar Fel 521-meddelandet?<\/h3>\n<p>Vanligtvis orsakas Fel 521-meddelandet av en av tv\u00e5 situationer:<\/p>\n<p>F\u00f6rst kan din WordPress-webbplats server vara nere. \u00c4ven om allt annat \u00e4r korrekt konfigurerat kommer Cloudflare helt enkelt inte att kunna ansluta om din WordPress-webbplats server \u00e4r offline.<\/p>\n<p>F\u00f6r det andra kan din webbserver fungera bra men blockera Cloudflares f\u00f6rfr\u00e5gningar av n\u00e5gon anledning. P\u00e5 grund av hur Cloudflare fungerar kan vissa s\u00e4kerhetsl\u00f6sningar p\u00e5 serversidan oavsiktligt blockera Cloudflares IP-adresser.<\/p>\n<p>Eftersom Cloudflare \u00e4r en <a href=\"https:\/\/kinqsta.com\/se\/blog\/omvand-proxy\/\">omv\u00e4nd proxy<\/a> kommer all trafik till din ursprungsserver att visas som om den kommer fr\u00e5n ett litet utbud av Cloudflare IP-adresser (<i>snarare \u00e4n varje enskild bes\u00f6kares unika IP-adress<\/i>). D\u00e4rf\u00f6r kommer vissa s\u00e4kerhetsl\u00f6sningar att se h\u00f6g trafik fr\u00e5n ett begr\u00e4nsat antal IP-adresser som en attack och blockera dem.<\/p>\n<p>N\u00e4r det h\u00e4nder kommer Cloudflare inte att kunna ansluta och visar Fel 521-meddelandet ist\u00e4llet.<\/p>\n<h2><a id=\"fix\"><\/a>S\u00e5 h\u00e4r fixar du Fel 521 f\u00f6r Cloudflare och WordPress<\/h2>\n<p>Nu n\u00e4r du vet vad som p\u00e5g\u00e5r, l\u00e5t oss gr\u00e4va i hur man fixar Fel 521 i WordPress.<\/p>\n<h3>Steg 1: Testa om ursprungsservern \u00e4r online<\/h3>\n<p>Innan du g\u00e5r vidare b\u00f6r du se till att din WordPress-webbplats server \u00e4r online och fungerar normalt. Om inte, \u00e4r det ingen po\u00e4ng med att gr\u00e4va i ytterligare fels\u00f6kningssteg.<\/p>\n<p>F\u00f6r att testa detta kan du k\u00f6ra ett cURL-kommando. Om du anv\u00e4nder Mac eller Linux kan du k\u00f6ra det h\u00e4r direkt fr\u00e5n Terminal.<\/p>\n<p>Windows har inte cURL installerat som standard och medan du kan installera det \u00e4r det enklare att <a href=\"https:\/\/tools.keycdn.com\/curl\">anv\u00e4nda KeyCDN:s online HTTP Header Check-verktyg<\/a>.<\/p>\n<p>Allt du beh\u00f6ver g\u00f6ra \u00e4r att skriva in <strong>http:\/\/1.2.3.4<\/strong>, d\u00e4r 1.2.3.4 \u00e4r den faktiska IP-adressen f\u00f6r din server.<\/p>\n<figure style=\"width: 1691px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/se\/wp-content\/uploads\/sites\/9\/2019\/05\/keycdn-header-check-verktyg.png\" alt=\"KeyCDN:s Header Check-verktyg\" width=\"1691\" height=\"940\"><figcaption class=\"wp-caption-text\">KeyCDN:s Header Check-verktyg<\/figcaption><\/figure>\n<p>Om du \u00e4r kund p\u00e5 Kinsta kan du hitta din servers IP-adress p\u00e5 fliken <strong>Webbplatser<\/strong>:<\/p>\n<figure style=\"width: 2004px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/se\/wp-content\/uploads\/sites\/9\/2019\/05\/var-hittar-kinsta-servers-ip-adress.png\" alt=\"Var du hittar din Kinsta-servers IP-adress\" width=\"2004\" height=\"914\"><figcaption class=\"wp-caption-text\">Var du hittar din Kinsta-servers IP-adress<\/figcaption><\/figure>\n<p>Du kan ocks\u00e5 h\u00e4mta den fr\u00e5n <strong>A<\/strong>-posten f\u00f6r din dom\u00e4n i <strong>DNS<\/strong>-omr\u00e5det i CloudFlares webbpanel.<\/p>\n<p>Om din server \u00e4r online, b\u00f6r du se ett <strong>HTTP 200<\/strong>-svar. Om du \u00e4r kund hos Kinsta ser du <strong>404 Inte Hittad<\/strong>, vilket ocks\u00e5 inneb\u00e4r att webbservern \u00e4r online (<i>det finns bara ingen sida associerad med den IP-adressen<\/i>):<\/p>\n<figure style=\"width: 1756px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/se\/wp-content\/uploads\/sites\/9\/2019\/05\/ett-exempel-lykad-anslutning.png\" alt=\"Ett exempel p\u00e5 en lyckad anslutning\" width=\"1756\" height=\"558\"><figcaption class=\"wp-caption-text\">Ett exempel p\u00e5 en lyckad anslutning<\/figcaption><\/figure>\n<p>Om det finns ett problem ser du n\u00e5got som <strong>V\u00e4rd inte hittad<\/strong> eller <strong>Misslyckades med att ansluta<\/strong>:<\/p>\n<figure style=\"width: 1589px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/se\/wp-content\/uploads\/sites\/9\/2019\/05\/ett-exempel-ett-problem-med-server.png\" alt=\"Ett exempel p\u00e5 ett problem med din server\" width=\"1589\" height=\"368\"><figcaption class=\"wp-caption-text\">Ett exempel p\u00e5 ett problem med din server<\/figcaption><\/figure>\n<p>Om det finns ett problem med din server och du inte \u00e4r s\u00e4ker p\u00e5 vad som h\u00e4nder, ta kontakt med din v\u00e4rds support (du kan <a href=\"https:\/\/kinqsta.com\/docs\/support\/contact-support\/\">komma \u00e5t Kinstas support fr\u00e5n var som helst i instrumentpanelen<\/a> via Intercom-widgeten).<\/p>\n<h3>Steg 2: Vitlista alla Cloudflare IP-intervall i serverns brandv\u00e4gg<\/h3>\n<p>Om din WordPress-webbplats server fungerar normalt men du fortfarande ser Fel 521-meddelandet n\u00e4r du f\u00f6rs\u00f6ker komma \u00e5t din webbplats \u00e4r n\u00e4sta steg att vitlista hela Cloudflares IP-intervall f\u00f6r att se till att din server inte blockerar dem.<\/p>\n<p><a href=\"https:\/\/www.cloudflare.com\/ips\/\">H\u00e4r \u00e4r en fullst\u00e4ndig lista \u00f6ver Cloudflares IP-intervall<\/a>.<\/p>\n<p>Du beh\u00f6ver se till att du inte blockerar dessa IP-adresser i <strong><a href=\"https:\/\/kinqsta.com\/se\/blog\/wordpress-htaccess-filen\/\">.htaccess<\/a>, iptables<\/strong>, eller din brandv\u00e4gg. Och du vill ocks\u00e5 se till att din hosting-leverant\u00f6r inte begr\u00e4nsar eller blockerar IP-f\u00f6rfr\u00e5gningar fr\u00e5n Cloudflares IP-adresser.<\/p>\n<p>Om du inte \u00e4r s\u00e4ker p\u00e5 hur du g\u00f6r detta, ta kontakt med din v\u00e4rds support. P\u00e5 Kinsta b\u00f6r dessa IP-intervall redan vara vitlistade.<\/p>\n<h3>Steg 3: Mer specifika problem<\/h3>\n<p>Slutligen listar vi h\u00e4r \u00e4r n\u00e5gra mer specifika tekniska \u00e5tg\u00e4rder du kan ta, beroende p\u00e5 din serverkonfiguration.<\/p>\n<p><strong>1)<\/strong> Om du precis b\u00f6rjat anv\u00e4nda Cloudflares HTTPS kanske din ursprungsserver inte \u00e4r konfigurerad f\u00f6r att till\u00e5ta Cloudflares IP-adresser att komma \u00e5t port 443. Om du inte kan konfigurera din brandv\u00e4gg f\u00f6r att till\u00e5ta detta, f\u00f6rs\u00f6k anv\u00e4nda <strong>Flexible SSL<\/strong> ist\u00e4llet f\u00f6r <strong>Full SSL<\/strong> p\u00e5 Cloudflare.<\/p>\n<p><strong>2)<\/strong> Se till att du anv\u00e4nder de senaste versionerna av <strong>Bad Behavior<\/strong> eller <strong>mod_security<\/strong>, om till\u00e4mpligt.<\/p>\n<p><strong>3)<\/strong> Om du anv\u00e4nder Apache-modulerna <strong>mod_antiloris<\/strong> eller <strong>mod_reqtimeout<\/strong>, inaktivera och avlasta dessa moduler.<\/p>\n<h2>Sammanfattning<\/h2>\n<p>Om du hostar din webbplats p\u00e5 Kinsta och fortfarande upplever 521-felet efter att ha implementerat dessa justeringar, kommer v\u00e5r support att kunna hj\u00e4lpa till \u2013 bara ta kontakt med oss genom Intercom chat-widgeten i din Kinsta-panel.<\/p>\n<p>F\u00f6reslagen l\u00e4sning: <a href=\"https:\/\/kinqsta.com\/se\/blog\/cloudflare-apo\/\">Hur man st\u00e4ller in Cloudflare APO f\u00f6r WordPress<\/a> och <a href=\"https:\/\/kinqsta.com\/blog\/ssl-handshake-failed\/\">Hur man fixar felet &#8221;SSL Handshake Failed&#8221; (5 metoder)<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fel 521 \u00e4r ett Cloudflare-specifikt felmeddelande (som fel 520) som visas n\u00e4r din WordPress-webbplats server avvisar en anslutning till Cloudflare. I det h\u00e4r inl\u00e4gget l\u00e4r du &#8230;<\/p>\n","protected":false},"author":103,"featured_media":35107,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[249,29],"topic":[763,836],"class_list":["post-35100","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-cloudflare","tag-wordpress","topic-cloudflare","topic-wordpress-problem"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>S\u00e5 h\u00e4r fixar du Fel 521 med WordPress och Cloudflare<\/title>\n<meta name=\"description\" content=\"Fel 521 \u00e4r ett felmeddelande som \u00e4r specifikt f\u00f6r Cloudflare. 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