{"id":2788,"date":"2025-02-20T11:29:43","date_gmt":"2025-02-20T11:29:43","guid":{"rendered":"https:\/\/certera.com\/kb\/?p=2788"},"modified":"2025-09-26T07:40:36","modified_gmt":"2025-09-26T07:40:36","slug":"how-to-install-an-ssl-certificate-on-proxmox-ve","status":"publish","type":"post","link":"https:\/\/certera.com\/kb\/how-to-install-an-ssl-certificate-on-proxmox-ve\/","title":{"rendered":"How to Install an SSL Certificate on Proxmox\u00a0Virtual Environment?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">What is Proxmox?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Proxmox Virtual Environment (Proxmox VE) is the open source program for virtualization based on QEMU\/KVM and LXC options.<br><br>It allows the administrators to monitor and control the running VMs and containers without direct access to the physical infrastructure, making it suitable for large scale data centers, as well as smaller networks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Proxmox VE bitmap has inbuilt WebGUI that enables secured management of the VMs, storage, networks and clusters with features such as HA, backup\/restore and smooth live migration between nodes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Prerequisites<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Here are some things to check before you start the process of installing SSL:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You have root level access to the Proxmox VE host where most of the work is to be carried out.<\/li>\n\n\n\n<li>The command and control center, Proxmox is available over secure connection using HTTPS on Port 8006.<\/li>\n\n\n\n<li>You have set up a domain pointing to the IP of the Proxmox host and can update its DNS records should need arise.<\/li>\n\n\n\n<li>The firewall permits HTTPS on port 8006 but blocks all other traffic coming from the dangerous sites.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Steps to Install an SSL Certificate on Proxmox<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These are the procedures to follow to successfully install an SSL certificate on Proxmox. This tutorial will guide you step by step on how to safely and effectively encrypt web traffic in the Proxmox environment.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Determine Type of SSL Certificate Required<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Proxmox supports traditional <a href=\"https:\/\/certera.com\/ssl-types\/single-domain-ssl-certificates\">single domain SSL certificates<\/a> which include the single domain name itself while it supports wildcard certificates, too. Wildcard certificates are also relatively more costly compared to the other types but they allow you to have an unlimited number of subdomains under your domain.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The following are aspects that one would consider when electing the type of certificate to issue:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Number of Subdomains:<\/strong> In case you require an SSL for the primary Proxmox domain name only (for instance, if the web address is proxmox.yourdomain.com), a single domain SSL certificate will suffice. For achieving unlimited subdomains, then it is recommended to go for a <a href=\"https:\/\/certera.com\/ssl-types\/wildcard-ssl-certificates\">wildcard SSL certificate<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Number of Nodes:<\/strong> In a multi-node Proxmox cluster, it is possible to use either multiple certificates for single domains, or a single certificate for the main domain \u2013 a Wildcard one.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Validity Period:<\/strong> Annual subscription makes any renewal procedures easy to handle since the certificates renew automatically each year. However, you make higher yearly installments in return. While perpetual certificates belie validity of between two and three years, they require manual renewal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Budget:<\/strong> As for the price, wildcard SSL certificates are more expensive compared with the single domain SSL certificates. However, you can <a href=\"https:\/\/certera.com\/cheap-ssl-certificates\">obtain SSL certificates at very low prices<\/a> from SSL resellers to kick start the process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once you decide on the SSL certificate type, proceed to the next step.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Generate a CSR<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To get an SSL certificate in Proxmox, one has to create a CSR known as Certificate Signing Request. The CSR also provides information on your organization and several essential details of the Proxmox server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can use our <a href=\"https:\/\/certera.com\/ssl-tools\/csr-generator\">automated CSR Generation Tool<\/a> or do it manually.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Follow these steps to generate a CSR on your Proxmox VE host:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Proxmox shell can be reached either through establishing an SSH connection or by means of the web-based console.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Switch to the root user<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>su -<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Go to the directory where CSR will be created<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>cd \/etc\/pve\/nodes\/&lt;node_name&gt;\/<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Generate a 2048-bit private key<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>openssl genrsa -out proxmox.key 2048<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Generate the CSR using the following command:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>openssl req -new -key proxmox.key -out proxmox.csr<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Enter the details like organization name, domain name, locality, etc. Provide accurate information.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Verify the contents of CSR<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>openssl req -text -noout -in proxmox.csr<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Copy the CSR to submit it to the SSL provider<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Receive Your SSL Certificate<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When the CSR is created, it is now time to procure an SSL certificate. <strong>Here are the steps:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once the order is complete, customers will be provided the SSL certificate files either via email or FTP. The delay involves additional checks if either domain validation is mandatory or the type of purchased certificate requires it.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 4: Install the SSL Certificate<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Upon obtaining the certificate from the CA, it has to be installed on the SSL, which is the Proxmox server. Follow these steps:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Extract and copy the following SSL certificate files to the Proxmox node:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Full Chain file (named like fullchain.pem or bundle.crt):<\/strong> Pem Formatted is an end-entity (your domain) certificate + one or more intermediate certificates.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Private Key file (yourdomain. key):<\/strong> A key that was generated when creating a CSR record, used for decrypting code that is sent to the server by the client.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Copy over the full chain file and private key to the Proxmox node.<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>scp fullchain.pem root@proxmox_IP:\/etc\/pve\/nodes\/node_name\/pveproxy-ssl.pem<\/em><\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code><em>scp yourdomain.key root@proxmox_IP:\/etc\/pve\/nodes\/node_name\/pveproxy-ssl.key<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Log into the Proxmox node via SSH and then ensure the right permissions are set on keys.<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>chmod 600 \/etc\/pve\/nodes\/node_name\/pveproxy-ssl.key<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Modify<\/strong> the primary configuration file of the Proxmox program, located at <strong>\/etc\/pve\/local\/pveproxy-ssl<\/strong>. and then, append the following lines of code:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>ssl-cert=\/etc\/pve\/nodes\/node_name\/pveproxy-ssl.pem<\/em><\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code><em>ssl-key=\/etc\/pve\/nodes\/node_name\/pveproxy-ssl.key<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Force the proxy service of Proxmox to restart<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>systemctl restart pveproxy<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The SSL certificate is now active on your Proxmox virtualization platform.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 5: Redirect HTTP to HTTPS<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Port 8006 is used to access the web interface of Proxmox through plain HTTP but it is advisable to make changes in the config file and have all the HTTP streams redirect to HTTPS.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>To redirect HTTP to HTTPS in Proxmox:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Edit \/etc\/pve\/nodes\/node_name\/pveproxy.cfg.<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>During the implementation of the listen section, change it to appear as:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>listen:\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : 127.0.0.1:8006\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; : IP:8006\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ssl: 'on'\n\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; proto: https<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>After that save all changes and restart pveproxy<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>systemctl restart pveproxy<\/em><\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Step 6: Verify Installation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Open the Proxmox web UI in a web browser, we will type the command: <strong>https:\/\/your-proxmox-domain:8006<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Search for any alert or error message that the browser might be displaying. The website should be opened with HTTPS without any problem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Right-click on the lock icon in the address bar, to view the certificate information. Check and approve your domain name, issued to, expiry date values.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>To connect and check the details of the certificate, use the openssl s_client command line.<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><em>openssl s_client -connect your-proxmox-domain:8006<\/em><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Utilize <a href=\"https:\/\/certera.com\/ssl-tools\/ssl-checker\">online SSL test tools<\/a> to evaluate the strength of TLS encryption and to verify the chain of trust.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Secure your website, files, and clients with one of the <a href=\"https:\/\/certera.com\/\">finest portfolios of SSL certificates<\/a>. Whether you are looking for a basic single domain, a wildcard, or a multi-domain certificate, Certera will have the right type of solution for you.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is Proxmox? Proxmox Virtual Environment (Proxmox VE) is the open source program for virtualization based on QEMU\/KVM and LXC options. It allows the administrators to monitor and control the running VMs and containers without direct access to the physical infrastructure, making it suitable for large scale data centers, as well as smaller networks. The<span class=\"morelink d-block mt-3\"><a href=\"https:\/\/certera.com\/kb\/how-to-install-an-ssl-certificate-on-proxmox-ve\/\">Read More<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":2789,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[386],"class_list":["post-2788","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ssl-installation","tag-install-an-ssl-certificate-on-proxmox","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Install an SSL Certificate on Proxmox?<\/title>\n<meta name=\"description\" content=\"Proxmox Virtual Environment (PVE) is an open-source platform. 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