{"id":2990,"date":"2025-12-09T08:39:31","date_gmt":"2025-12-09T08:39:31","guid":{"rendered":"https:\/\/certera.com\/kb\/?p=2990"},"modified":"2025-12-09T08:39:32","modified_gmt":"2025-12-09T08:39:32","slug":"how-to-generate-a-csr-for-wildcard-ssl-and-install-the-certificate","status":"publish","type":"post","link":"https:\/\/certera.com\/kb\/how-to-generate-a-csr-for-wildcard-ssl-and-install-the-certificate\/","title":{"rendered":"How to Generate a CSR for Wildcard SSL  and Install a Certificate?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Introduction<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Creating CSR to a Wildcard SSL Certificate is one of the steps if you would want to protect your domain and its subdomain levels. CSR stands for Certificate Signing Request, which is an encoded text formatted block sent to the Certificate Authority for an SSL certificate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article will provide you with the step by step instructions for creation of a CSR for a Wildcard SSL Certificate with Windows (IIS), Linux (OpenSSL) and cPanel hosts along with the installation steps.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With a Wildcard SSL Certificate, you get an enhanced ability to protect all the subdomains on your company website.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/certera.com\/ssl-types\/wildcard-ssl-certificates\">Wildcard SSL Certificate<\/a> lets you lock a primary domain and all of the subdomains associated with it with the help of a single SSL Certificate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For instance<\/strong>, there is a Wildcard SSL for the domains of *.example. com will secure `www.example.com`, `blog.example.com`, `store. example. com`, etc. , which is most useful for organizations with a number of subdomains, for example, simplifying the management and consequently the <a href=\"https:\/\/certera.com\/blog\/how-much-does-an-ssl-certificate-cost-essential-guide\/\">costs of SSL certificates<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Prerequisite<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before generating the CSR, gather the following information about your organization:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Common Name (CN):<\/strong> This is the domain name which you want to get the certificate for, with a wildcard character added before it (for instance, *. g. , *.example. com).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Organization (O):<\/strong> Also known as a formal name or registered name, which is the official name of your organization as per the law.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Organizational Unit (OU): <\/strong>With regard to the organization\u2019s structure and culture, the following stands out: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The department within the organization that would best benefit from the proposed IT security policy is <\/li>\n\n\n\n<li>The following presents the structure of the organization with respect to the staff, departments, and responsibilities:g. , IT, Marketing).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>City\/Locality (L):<\/strong> This is the geographical location of your organization in accordance with the legal regime of the country.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>State\/Province (ST):<\/strong> The geographical place that an organization is authorized to operate legally out of, often referred to as a state or a province.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Country (C):<\/strong> If your organization is legally based in a two-letter country code, indicate that in the blank here:g. Am, AM, AN, AU, CA, GB, IN, NZ, SG, UK, US for the United States).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Also Read:<\/strong> <a href=\"https:\/\/certera.com\/kb\/what-is-ssl-common-name-wildcard-error-how-to-fix-it\/\">What is SSL Common Name Wildcard Error? How to Fix<\/a>?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Multiple Options for CSR Creation<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/certera.com\/ssl-tools\/csr-generator\">Using Online CSR Generator Tool<\/a><\/li>\n\n\n\n<li>CSR Creation on Windows (IIS)<\/li>\n\n\n\n<li>CSR Creation in Linux via OpenSSL<\/li>\n\n\n\n<li>CSR Creation in cPanel<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Steps to Create CSR for Wildcard Certificates on Windows (IIS)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Open IIS Manager:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Appropriate the keyboard shortcut <strong>Win + R <\/strong>and <strong>type inetmgr <\/strong>press Enter to begin the Internet Information Services (IIS) Manager.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Navigate to Server Certificates:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>On the left panel of the snap-in, <strong>locate the Connections folder<\/strong> and expand it by <strong>clicking the \u2018+\u2019 symbol<\/strong> beside Connection folder; <strong>right click the relevant server name<\/strong> and <strong>select Properties<\/strong> as shown below.<\/li>\n\n\n\n<li>Next up in the middle part of the GUI is the Features list, in which <strong>double-clicking on Server Certificates<\/strong> is the next step.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Create Certificate Request:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>On the right-hand side, <strong>tap on Actions and under the Subset Certification Authority Urus &amp; Officer<\/strong>, click on Create Certificate Request.<\/li>\n\n\n\n<li>In response, this opens the <strong>Request Certificate wizard<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Enter Distinguished Name Properties:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Common Name:<\/strong> Please type your wildcard domain name (For example, they type: *.Within \u201cMy Website\u201d)g. , *.example. com).<\/li>\n\n\n\n<li><strong>Organization: <\/strong>Please, type in your organization\u2019s legal name.<\/li>\n\n\n\n<li><strong>Organizational Unit:<\/strong> Please type in your department, for example;  IT<\/li>\n\n\n\n<li><strong>City\/Locality: <\/strong>Type in your city (For example, San Francisco)<\/li>\n\n\n\n<li><strong>State\/Province:<\/strong> Type in your state (for example, e. g. , California).<\/li>\n\n\n\n<li><strong>Country\/Region:<\/strong> Please type in your country code (for example US).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Set Cryptographic Properties:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cryptographic Service Provider:<\/strong> In the dropdown list of Security packages, select &#8216;<strong>Microsoft RSA SChannel Cryptographic Provider<\/strong>&#8216;.<\/li>\n\n\n\n<li><strong>Bit Length:<\/strong> Choose &#8216;<strong>2048<\/strong>&#8216;, which is recommended.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Save the CSR:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>File Name: <\/strong>CSuRL2Enter a filename for your CSR (e. g. , wildcard_example_com. csr).<\/li>\n\n\n\n<li>Usually, if available, click finish to proceed in generating the CSR file.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Submit the CSR to Your CA:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use CSR file\u2019s content and send it as a submission to the Certificate Authority (CA) or Provider of your choice to apply as an SSL certificate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CSR Creation on Linux over OpenSSL<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Open a Terminal:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Secure shell into your server or directly navigate to the terminal on your server.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Generate a Private Key:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Run the following command to generate a 2048-bit RSA private key:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>openssl genrsa -out<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>wildcard_example_com.key 2048:<\/strong> This starts up a file to be called wildcard_example_com.key containing your private key .<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Enter the Command to Generate the CSR:<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>openssl req -new -key wildcard_example_com. key -out wildcard_example_com. csr<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When prompted, enter the necessary information:<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Verify the CSR:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Check the content of the CSR file to ensure it&#8217;s correct:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>openssl req -noout -text -in wildcard_example_comcsr<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Submit the CSR to Your CA:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">All what is in the <strong>wildcard_example_com.CSR file<\/strong> and provide it to the particular CA, which you have chosen for obtaining an SSL certificate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Generating a CSR in cPanel<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Log in to cPanel: <\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Log in to your cPanel with the help of the access details provided by your web hosting company.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Navigate to SSL\/TLS Manager:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Next, click on the <strong>Security section<\/strong>, and under it, you will find the <strong>SSL\/TLS option<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Generate a New CSR:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To configure settings for Certificate Signing Requests (CSR), <strong>go to the Generate, view, or delete SSL certificate signing requests option<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fill out the form with the following information:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Key:<\/strong> Choose the key belonging to the domain. &lt;tools>&lt;|scholastic|> One among the key that belongs to the domain has to be chosen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Domains: <\/strong>Please enter your wildcard domain such as yourownwildcarddomainhere.com if you have one, otherwise skip this step.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>City:<\/strong> Please type in your city<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>State:<\/strong> Type in your state to indicate your geographical location because the content differs depending on the location.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Country:<\/strong> You should choose your country.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Company:<\/strong> Please, provide your organization name.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Company Division:<\/strong> Please enter your department.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Email:<\/strong> Include your email address if you wish to later receive an e-mail notification about the status of the delivery.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Passphrase:<\/strong> It is producing an encryption of fill, enter a passphrase (optional).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Description: <\/strong>In this step, you should enter a description if needed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Generate the CSR:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>To instigate the CSR generation, click on the \u2018<strong>Generate<\/strong>\u2019 button.<\/li>\n\n\n\n<li>The newly generated CSR will also be shown on the screen and at the bottom, a message will be posted to indicate that it has been <strong>saved in cPanel<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Submit the CSR to Your CA:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You can make the CSR document by copying the CSR content and then submitting it to the CA or <a href=\"https:\/\/certera.com\/cheap-ssl-certificates\">SSL Provider<\/a> of your choice as part of the SSL certificate application.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion of the SSL Certificate Request<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Following the process of creating the CSR and submitting it to the CA, here is how the SSL certificate request is completed, and the certification installed in the server:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Receive the Certificate:<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\"><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">When your CA approves your information, they\u2019ll confer your Wildcard SSL certificate. <strong>This typically includes:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Your domain certificate (a .crt or .cer file).<\/li>\n\n\n\n<li>CA package (intermediate certificates).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Install the Certificate:<\/h3>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\"><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">All other installation instructions should be clear and given according to your CA, and the installation process will differ depending on whether you are using a Windows or Linux server, or cPanel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Follow the below process based on your server.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Installing Wildcard SSL on Windows (IIS)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Open IIS Manager:<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\"><\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open IIS Manager console by <strong>pressing R and then typing inetmgr<\/strong> in the opened Run dialog window.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Import the Certificate:<\/h3>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\"><\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>On the left pane, <strong>click on Server Certificates link<\/strong> and then <strong>click Complete Certificate Request<\/strong>.<\/li>\n\n\n\n<li><strong>Choose the certificate file<\/strong> that you have obtained from your CA.<\/li>\n\n\n\n<li>Give the certificate a friendly name and <strong>press Ok<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Bind the Certificate:<\/h3>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\"><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>To do this use the IIS Manager: <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In IIS Manager, <strong>expand the Sites node<\/strong>, and then <strong>right click on the selected site<\/strong>.<\/li>\n\n\n\n<li>Select <strong>Click Bindings<\/strong> in the Actions pane.<\/li>\n\n\n\n<li><strong>Under Common Name<\/strong>, add a binding with the type `https` and then select your Wildcard SSL certificate from the drop list.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Apply and Restart:<\/h3>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\"><\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Click OK and restart internet information services<\/strong> to enhance the changes.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Installing Wildcard Certificate on Linux (Apache)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Copy the Certificate Files: <\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Put your domain certificate, private key, and CA bundle in a <strong>directory located on your server<\/strong>  e.g `\/etc\/ssl\/certs\/`).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Update Apache Configuration:<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\"><\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You better <strong>edit the configuration file of Apache<\/strong> (for example it could be httpd. conf or something like that) e.g: `\/etc\/httpd\/conf. d\/ssl. conf` or `\/etc\/apache2\/sites-available\/default-ssl. conf`).<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>SSLCertificateFile \/etc\/ssl\/certs\/wildcard_example_com. crt<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>SSLCertificateKeyFile \/etc\/ssl\/certs\/wildcard_example_com. key<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>SSLCertificateChainFile \/etc\/ssl\/certs\/ca_bundle. crt<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Restart Apache:<\/h3>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\"><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>To apply change restart Apache:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo systemctl restart httpd<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Installing Wildcard SSL Cert on cPanel<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Log in to cPanel:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>To access your cPanel account follow the steps;<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Navigate to SSL\/TLS Manager:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Memory organization is organized in six sections:<\/strong> General, Connections, Security, Logging, Authentication, and Proxy. <\/li>\n\n\n\n<li>In the <strong>Security<\/strong> section, <strong>click SSL\/TLS<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Install an SSL Certificate:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In the <strong>left part of the Web Root Directory page<\/strong>, under Install and Manage SSL for your site (HTTPS), <strong>click Manage SSL sites<\/strong>.<\/li>\n\n\n\n<li>Select your domain and <strong>paste the certificate files into the corresponding fields<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>Certificate (CRT):<\/strong> Your domain certificate can be explained as the statement of the domain you have opted for and the evidence that your site belongs to you.<\/li>\n\n\n\n<li><strong>Private Key (KEY): <\/strong>Your private key is the key that should remain secret, since it uniquely identifies you and ensures your access to various platforms and servers.<\/li>\n\n\n\n<li><strong>Certificate Authority Bundle<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Also Read:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/certera.com\/kb\/how-to-install-a-wildcard-ssl-certificate-on-iis-7-iis-8-iis-10\/\">How to Install a Wildcard SSL Certificate on IIS 7,IIS 8 &amp; IIS 10?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/certera.com\/kb\/how-to-install-wildcard-ssl-certificate-on-ubuntu-22-apache-server\/\">How to Install Wildcard SSL Certificate on Ubuntu 22 Apache Server?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/certera.com\/kb\/how-to-install-a-wildcard-certificate-on-a-nginx-server\/\">How to Install a Wildcard Certificate on a Nginx Server?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/certera.com\/kb\/how-to-install-a-wildcard-certificate-on-fortigate\/\">How to Install a Wildcard Certificate on FortiGate?<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When it comes to\/requiring an SSL certificate, go for Certera\u2019s easy to use <a href=\"https:\/\/certera.com\/ssl-tools\/csr-generator\">CSR generation tool<\/a>. Make it easier to create your wildcard SSL certificate and CSR so that you can <a href=\"https:\/\/certera.com\/ssl-types\/wildcard-ssl-certificates\">obtain your wildcard SSL<\/a> with ease. Certera provides an easy navigation of the site, thus enabling users to secure their wildcard SSL certificate without delay.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Creating CSR to a Wildcard SSL Certificate is one of the steps if you would want to protect your domain and its subdomain levels. CSR stands for Certificate Signing Request, which is an encoded text formatted block sent to the Certificate Authority for an SSL certificate. This article will provide you with the step<span class=\"morelink d-block mt-3\"><a href=\"https:\/\/certera.com\/kb\/how-to-generate-a-csr-for-wildcard-ssl-and-install-the-certificate\/\">Read More<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":3037,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[50],"tags":[416,417],"class_list":["post-2990","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-generate-csr","tag-generate-csr-for-wildcard-ssl","tag-install-wildcard-ssl-certificate","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Generate a CSR &amp; Install Wildcard SSL Certificate?<\/title>\n<meta name=\"description\" content=\"Follow the step by step instruction to generate CSR for Wildcard SSL Certificate and Install on different 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