Create a subdomain

Reminder: What is a sub-domain?

A subdomain is an extension of your main domain name. It is determined by a DNS entry and usually an associated service or hosting.

For example:

portail.lrob.fr is a subdomain of lrob.fr.
www.lrob.fr is also a sub-domain, although it is often configured by default

Subdomains are unlimited on Web Hosting LRob as well as on Web Agency offers.

Create a subdomain via Plesk

This mini-guide explains how to create a subdomain containing a website via your Plesk panel, when your domain is fully managed by LRob (DNS included), and you have a Let's Encrypt Wildcard SSL certificate already active for this domain.

If you only need to create a DNS entry for an external service or site, then go instead to the page about DNS zones.

Step 1: Access domain management

Log in to your Plesk control panel.
In the main menu, click on "Websites & domains.

Step 2: Add a subdomain

At the top of the page, click on "Add a subdomain".
In the Subdomain name field, enter the desired name (e.g. blog, api, dev, boutique, etc.).
Leave the default document root proposed by Plesk, unless you have a specific need.
Click "OK" to confirm subdomain creation.

Step 3: Apply the Wildcard SSL certificate

Once the subdomain has been created, it is important to secure connections with HTTPS :

In the list of domains, locate the section corresponding to the sub-domain you've just created.
Click "Hosting and DNS", then "Hosting".
Scroll down to the "Certificate" section.
From the drop-down list, select the Wildcard certificate corresponding to your domain. It will appear as:
lrob.fr (valid for *.lrob.fr)
Click on "Save".

Your subdomain is now active and secure, so all you have to do is enjoy it.