{"id":8916,"date":"2026-10-19T16:25:56","date_gmt":"2026-10-19T13:25:56","guid":{"rendered":"https:\/\/support.withsecure.com\/support-articles\/some-websites-show-err_ssl_protocol_error-or-ssl_error_access_denied_alert-in-the-browser\/"},"modified":"2026-10-19T16:25:56","modified_gmt":"2026-10-19T13:25:56","slug":"some-websites-show-err_ssl_protocol_error-or-ssl_error_access_denied_alert-in-the-browser","status":"publish","type":"support_article","link":"https:\/\/support.withsecure.com\/de\/support-articles\/some-websites-show-err_ssl_protocol_error-or-ssl_error_access_denied_alert-in-the-browser\/","title":{"rendered":"Some websites show ERR_SSL_PROTOCOL_ERROR or SSL_ERROR_ACCESS_DENIED_ALERT in the browser"},"content":{"rendered":"<h3>Issue:<\/h3>\n<p>When a user tries to access some websites with their internet browser, they are shown the following error depending on the browser in use:<\/p>\n<ul>\n<li>Google Chrome and Microsoft Edge: &quot;The connection for this site is not secure &#8211; &lt;website address&gt; sent an invalid response &#8211; ERR_SSL_PROTOCOL_ERROR<\/li>\n<li>Firefox: &quot;Secure Connection Failed &#8211; The page you are trying to view cannot be shown because the authenticity of the received data could not be verified &#8211; Error code: SSL_ERROR_ACCESS_DENIED_ALERT&quot;\u00a0<\/li>\n<\/ul>\n<p>Why are these errors shown only on specific sites and how can we fix these errors from appearing?\u00a0\u00a0<\/p>\n<h3>Resolution:<\/h3>\n<p>This error is shown because the Browsing Protection feature has blocked the website and the Browsing Protection by WithSecure browser extension \/ add-on is either not installed or activated in the browser. The extension \/ add-on is required to be able to show the Browsing Protection block page on HTTPS websites. On HTTP sites the block page can be shown even when the extension \/ add-on is not installed or active in the browser.\u00a0<\/p>\n<p>A website can be blocked for example if:<\/p>\n<ul>\n<li>Website is rated as harmful or suspicious by Browsing Protection<\/li>\n<li>Website category has been blocked by the Web Content Control feature<\/li>\n<li>Connection Control is active and the website is not rated as safe for banking<\/li>\n<\/ul>\n<p>You need to make sure that the Browsing Protection by WithSecure browser extension \/ add-on is installed and active in your browser.\u00a0<\/p>\n<p>How to install the extension \/ add-on:\u00a0<\/p>\n<ol>\n<li>Right-click the <strong>Elements Agent <\/strong>or <strong>Client <\/strong><strong>Security <\/strong>icon in Windows the system tray<\/li>\n<li>Click <strong>Open settings\u00a0<\/strong><\/li>\n<li>Go to the <strong>Browser extensions <\/strong>settings page<\/li>\n<li>Follow the instructions to install the browser extension<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Users are reporting the following error message when browsing with Firefox:<br \/>&quot;Secure Connection Failed<br \/>An error occured during a connection to &lt;webpage&gt;. Peer received a valid certificate, but access was denied. Error code: SSL_ERROR_ACCESS_DENIED_ALERT&quot;\u00a0<br \/>If I disable Computer Protection on a machine with the problem, it goes away.\u00a0<\/p>\n","protected":false},"template":"","support_article_product":[99],"class_list":["post-8916","support_article","type-support_article","status-publish","hentry"],"acf":{"source_foreign_id":"000006753","source_version":1,"source_system":"salesforce","source_date_updated":"2026-10-19 13:25:56","import_hash":"af50b0db1302cd2be9247d12bce51e4bd5bd47cd","vanilla_article_id":"","vanilla_url":"","vanilla_kb_id":"","vanilla_category_id":"","machine_translated":false,"reactions_helpful_yes":"","reactions_helpful_no":""},"_links":{"self":[{"href":"https:\/\/support.withsecure.com\/de\/wp-json\/wp\/v2\/support_article\/8916","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/support.withsecure.com\/de\/wp-json\/wp\/v2\/support_article"}],"about":[{"href":"https:\/\/support.withsecure.com\/de\/wp-json\/wp\/v2\/types\/support_article"}],"wp:attachment":[{"href":"https:\/\/support.withsecure.com\/de\/wp-json\/wp\/v2\/media?parent=8916"}],"wp:term":[{"taxonomy":"support_article_product","embeddable":true,"href":"https:\/\/support.withsecure.com\/de\/wp-json\/wp\/v2\/support_article_product?post=8916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}