![]() Synology's LE certificates do not support subdomain names in their certificates (unless you create them manually and specify multiple SAN names), so accessing this URL will give you a warning in your browser saying the connection is not secure. With your current setup and LE certificate, this will not work. Let's say that you have specific services that you wanna access via a custom domain name like. For others, that wanna use multiple services on their NAS and/or maybe wanna access those same services using a custom domain name, things get a bit more complicated. Now that we have a working certificate and a DDNS name you can access your NAS using this url. Great! To make things even better since the latest (current) version of DSM 6.2.2, Synology has made changes so when you do register a DDNS name with their service you will generate a LE SSL cert on the fly. This is a public domain name that will point to your nas from any browser over the Internet and its resources. The problem starts to appear when you have multiple services on your Synology NAS (or any device in general) that you wanna publish on the Internet using their own subdomain names.įor example, let's say you register a free DDNS name on your Synology NAS called. So for most, getting a LE SSL cert for their Synology DDNS name will be enough. DSM wildcard support?Īs I said before, DSM in its current version does not support wildcard certificates, but it does support LE certs in general. Well in my book, a few minutes work every 3 months for 0$ cost of a single wildcard certificate, is well worth it. The only downside (if you can call it that way) is that they last only 3 months. So in a few words what's the general idea here? Well if you are not familiar with Let's encrypt, you can google it ofc, but it's a free root certificate authority that lets you issue and use free SSL certificates that you can then use to protect your websites and services. In this tutorial, you can find the steps needed to get a Let's Encrypt wildcard certificate using a Docker container. If you ever wanted to use a wildcard certificate with your Synology NAS you probably found that out of the box that's not possible. More info on the bottom, " Getting a 3rd party domain wild card cert using Synology UI and Cloudflare" This will work for Synology-owned domains, like as well as 3rd party domains via CloudFlare (for 3rd party wild card certs). Since DSM 6.2.3-25423 version, Let's Encrypt wild card certificates can be created from DSM Control Panel > Security > Certificates. ![]()
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