{"id":2109,"date":"2017-12-19T09:04:32","date_gmt":"2017-12-19T14:34:32","guid":{"rendered":"https:\/\/www.rapidsslonline.com\/blog\/?p=2109"},"modified":"2020-09-08T03:32:04","modified_gmt":"2020-09-08T09:02:04","slug":"multi-domain-san-ssl-certificate-compatibility","status":"publish","type":"post","link":"https:\/\/www.rapidsslonline.com\/blog\/multi-domain-san-ssl-certificate-compatibility\/","title":{"rendered":"Multi-Domain SAN SSL Certificate Compatibility"},"content":{"rendered":"<h2>What browsers support Multi Domain SSL or SAN SSL Certificate<\/h2>\n<p>A SAN SSL Certificate, sometimes referred to a Multi-Domain, allows you to encrypt up to 250 different domains on a single SSL certificate. That\u2019s pretty impressive. That would be like if 250 people could share a driver\u2019s license [Editor\u2019s Note: This is a terrible comparison].<\/p>\n<p><!--more--><\/p>\n<p>I use <a href=\"https:\/\/www.rapidsslonline.com\/ssl-types\/multi-domain-san-certificates.aspx\" target=\"_blank\" rel=\"noopener noreferrer\">a Multi-Domain SSL certificate for all of my websites<\/a>. That\u2019s right, I have websites. I built them all back on GeoCities back in the day. They\u2019re still out there. And don\u2019t ever let anyone tell you that a visitor counter isn\u2019t still cool. I\u2019m almost to 1,000 on my top site. Boo-yah!<\/p>\n<p>Anyway, Multi-Domain SSL certificates make use of the SAN field in your CSR. Basically, after your list, your main website as your Fully Qualified Domain Name, each additional site or sub-domain or IP is listed as a SAN. In the case of a Multi-Domain Wildcard, some of the SANs may also include an asterisk.<\/p>\n<p>Now, when a browser connects to your website using HTTPS, it checks that the SSL certificate matches the hostname in the address bar. There are three ways the browser checks:<\/p>\n<ul>\n<li>It checks if the hostname matches the common name on the SSL certificate<\/li>\n<li>It checks if the hostname matches a Wildcard common name<\/li>\n<li>It checks if the hostname is listed in a SAN field<\/li>\n<\/ul>\n<p>Now, obviously, all the browsers support hostname matching. Without that, you basically don\u2019t support SSL. But here\u2019s a helpful tip. Sometimes, when a browser supports SANs, it\u2019s directed to ignore the common name and skip right to the SANs. This is why we recommend listing your Common Name as your first SAN, as well.<\/p>\n<h3>What Browsers Support SANs<\/h3>\n<p>Most desktop and mobile browsers support all three kinds of host name matching. Some older browsers don\u2019t support SANs though.<\/p>\n<h3>Supported:<\/h3>\n<ul>\n<li>Internet Explorer<\/li>\n<li>Microsoft Edge<\/li>\n<li>Mozilla Firefox<\/li>\n<li>Google Chrome<\/li>\n<li>Apple Safari<\/li>\n<li>Opera<\/li>\n<li>Netscape<\/li>\n<li>Windows Mobile 5<\/li>\n<li>Windows Mobile 6<\/li>\n<li>New Palm Treo \u2013 Must use WM5<\/li>\n<li>New Phones on Symbian OS \u2013 9.2+<\/li>\n<\/ul>\n<h3>Not Supported<\/h3>\n<ul>\n<li>Older Phones on Symbian OS \u2013 9.1 and earlier<\/li>\n<li>Older Palm Treo \u2013 PalmOS<\/li>\n<\/ul>\n<p>So basically, if you\u2019re running on anything current you can expect it to recognize SAN fields. Just remember, some browsers may skip the common name so it\u2019s important to also list it as a SAN.<\/p>\n<p>Stay Cautious, My Friends<\/p>\n\n\n<a class=\"more-link floatnone\" style=\"text-decoration: none;\" href=\"https:\/\/www.rapidsslonline.com\/ssl\/whats-the-difference-between-a-san-certificate-vs-wildcard-ssl-certificate\/\n\">Understand SAN Certificate Vs Wildcard SSL Certificate<\/a>\n","protected":false},"excerpt":{"rendered":"<p>What browsers support Multi Domain SSL or SAN SSL Certificate A SAN SSL Certificate, sometimes referred to a Multi-Domain, allows you to encrypt up to 250 different domains on a &hellip; <span class=\"d-flex justify-content-end\"><a href=\"https:\/\/www.rapidsslonline.com\/blog\/multi-domain-san-ssl-certificate-compatibility\/\" class=\"btn btn-blue\">Read More <span class=\"screen-reader-text\">Multi-Domain SAN SSL Certificate Compatibility<\/span><\/a><\/span><\/p>\n","protected":false},"author":3,"featured_media":2191,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[13],"tags":[1391],"class_list":["post-2109","post","type-post","status-publish","format-standard","has-post-thumbnail","category-san-certificate","tag-multi-domain-ssl"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Multi Domain SSL or SAN SSL or UCC Certificate Compatibility Expalined<\/title>\n<meta name=\"description\" content=\"Learn what browsers and mobile devices support Multi Domain SSL or SAN SSL or UCC SSL certificates and which ones don&#039;t have support for the SAN field.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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