MeshCentral makes use of HTTPS to authenticate and encrypt management traffic over the network. By default, a self-signed certificate is used for the MeshCentral HTTPS server. That certificate is not trusted by browsers and so, you get a warning message when visiting the web site. You can solve this but obtaining a free trusted certificate from Let’s Encrypt (https://letsencrypt.org/). There are some limitations and so, it’s best to get familiar with this service before starting. You will also need a valid domain name that you own and that points to your MeshCentral server.