ACME (Automated Certificate Management Environment) lets you issue, install, and renew SSL certificates automatically, without manual intervention. As certificate lifetimes continue to shrink (200 days in 2026, 100 days in 2027, and 47 days by 2029), automation is no longer optional for most environments.
In this section, you’ll find step-by-step ACME tutorials for Apache, NGINX, Windows IIS, OPNsense, cPanel, Kubernetes, and more, including support for commercial certificate authorities using External Account Binding (EAB)
How to Install an ACME SSL Certificate on Apache & NGINX
You’ll learn how to install an ACME certificate on Apache and NGINX using Certbot across different Linux distributions. We’ll cover Debian-based and RHEL-based systems, include clarifications where needed, and walk you through everything from installation to automated renewal.
How to Install an ACME SSL Certificate on Windows IIS
You’ll learn how to install an ACME SSL certificate on Windows IIS using Win-ACME (WACS), with full support for External Account Binding (EAB), custom ACME directories, and multi-domain setups. This process works for business environments and commercial ACME-compatible CAs.
How to Install an ACME SSL Certificate on OPNsense Firewall
You’ll learn how to install an ACME certificate on OPNsense using the official plugin, configure your ACME account with EAB credentials, validate domain ownership, and automatically deploy certificates. This method is ideal for those using OPNsense as a gateway, reverse proxy, or to secure services behind NAT. Let’s walk through each step.
How to Install an ACME SSL Certificate on cPanel
You’ll learn how to install an ACME SSL certificate on cPanel using the ACME.sh client. We’ll cover the full setup, including how to register with your certificate authority using EAB credentials, issue the certificate via webroot validation, and automatically apply it to your domain using cPanel’s native APIs.
How to Install an ACME SSL Certificate in Kubernetes
You’ll learn how to install an ACME SSL certificate in Kubernetes using cert-manager. We’ll cover installation, setting up an issuer with External Account Binding (EAB), and issuing certificates to protect your ingress services.
How to Install an ACME SSL Certificate on Remote Desktop Protocol
Installing SSL on RDP used to be a manual process, but with ACME protocol support and tools like Win-ACME, it’s now possible to automate certificate issuance and renewal — even for commercial CAs like Sectigo and DigiCert that support ACME + External Account Binding (EAB).
How to Install an ACME SSL Certificate on LiteSpeed
You’ll set up the ACME client, connect it to your certificate provider, request a secure certificate, and configure LiteSpeed to use it, all in just a few clear steps. Once complete, your certificates will renew automatically with no manual intervention required.
How to Fix ACME SSL Certificate Errors
When you’re setting up or renewing SSL certificates using the ACME protocol, it’s not unusual to run into cryptic errors that stop the process in its tracks. This guide walks you through the most common ACME-related issues, explains what they actually mean, and shows you exactly how to fix them.
How to Install an ACME SSL Certificate on FortiGate
This guide shows how to install and automate SSL certificates on FortiGate firewalls using the ACME protocol with External Account Binding (EAB), the standard method commercial certificate authorities use for secure automation.
How to Install an ACME SSL Certificate on pfSense
In this guide, you’ll learn how install an ACME SSL certificate on pfSense. The firewall now supports the ACME protocol natively through its built-in package, which lets you automate SSL certificate issuance and renewal.
How to Install an ACME SSL Certificate on a Synology NAS
In this guide, you’ll learn how to install an ACME SSL certificate on a Synology NAS using ACME + EAB credentials, then import it into Synology. Once done, your NAS will be running a certificate with automation handled entirely outside DSM (Disk Station Manager).
How to Install an ACME SSL Certificate on TrueNAS
This guide shows how to install an ACME SSL Certificate on TrueNAS using an external host and EAB (External Account Binding). It’s compatible with both TrueNAS CORE and TrueNAS SCALE.
How to Install an ACME SSL Certificate on Mail Servers
In this guide, you’ll learn how to install an ACME SSL certificate on mail servers, specifically Postfix, Dovecot, and optionally Exim, using commercial providers that support ACME + EAB. We’ll use acme.sh to register your ACME account, issue a certificate for your mail hostname, and then plug that certificate directly into your mail server’s TLS configuration.
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