After the installer finishes, it prints the panel URL, admin email, and temporary password. This article walks through what to do with those.
Accessing the Panel
Open your browser and navigate to:
https://YOUR_SERVER_IP:8443
Your browser will show a security warning — something like "Your connection is not private" or "Certificate error." This is expected: the installer issues a self-signed SSL certificate for the panel itself. Click Advanced → Proceed (Chrome/Edge) or Accept the Risk and Continue (Firefox).
[!TIP] To get rid of the browser warning, issue a real Let's Encrypt certificate for your panel hostname:
certbot --nginx -d panel.yourdomain.comPoint an A record at your server IP first, then run this on the server.
Logging In
Use the admin email and password you set during installation. If you skipped the installation (someone else ran it), the credentials were printed at the end of the installer output — or stored in /opt/opterius/.env.
What You See First
After login, you land in Server Mode — the admin view. This is the WHM-equivalent: it shows server status, resource usage, and lets you manage hosting accounts, packages, DNS, and server settings.
There are two modes in Opterius:
- Server Mode — the admin perspective (server health, account management, server-wide settings)
- Hosting Mode — the account owner's perspective (domains, email, databases, files)
You can switch between modes from the navigation. See Modes Explained for detail on what each mode contains.
First Steps
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Activate your license — go to Settings → License and enter your license key. Without an active license, you're on the Free plan (up to 5 hosting accounts). See Activating Your License.
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Set up nameservers — if you want your server to be authoritative for DNS (so clients can point their domains to your nameservers), configure your
ns1/ns2hostnames in Settings → DNS. See Glue Records. -
Create your first hosting account — go to Accounts → New Account. See Creating Your First Account.