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CyberPanel Integration

This guide explains how to configure the Ultimate Multisite CyberPanel integration so that mapped domains in your network are automatically added (and removed) as virtual hosts in CyberPanel, with optional auto-SSL provisioning via Let's Encrypt.

What It Does​

  • When a domain is mapped in Ultimate Multisite, the integration calls the CyberPanel API to create a virtual host for that domain.
  • When a domain mapping is removed, the integration calls the API to delete the corresponding virtual host.
  • When auto-SSL is enabled, the integration triggers Let's Encrypt certificate issuance immediately after the virtual host is created.
  • Optionally adds/removes the www. alias depending on your "Auto-create www subdomain" setting in Domain Mapping settings.

Prerequisites​

  • A running CyberPanel instance (v2.3 or later recommended) reachable from your WordPress server.
  • An existing website in CyberPanel that already serves your WordPress network root. The integration attaches new virtual hosts to this server.
  • CyberPanel API access enabled. Authentication uses your CyberPanel admin username and password.
  • Your DNS records for mapped domains must already point to your server's IP address before auto-SSL can issue a valid certificate.

Requirements​

The following constants must be defined in your wp-config.php file:

define('WU_CYBERPANEL_HOST', 'https://your-cyberpanel-host:8090');
define('WU_CYBERPANEL_USERNAME', 'your_admin_username');
define('WU_CYBERPANEL_PASSWORD', 'your_admin_password');
define('WU_CYBERPANEL_PACKAGE', 'Default');

Optionally, you can also define:

define('WU_CYBERPANEL_AUTO_SSL', true);          // Default: true — issue Let's Encrypt SSL after domain creation
define('WU_CYBERPANEL_PHP_VERSION', 'PHP 8.2');  // Default: PHP 8.2
define('WU_CYBERPANEL_EMAIL', '[email protected]'); // Used for SSL certificate contact

Setup Instructions​

1. Enable the CyberPanel API​

  1. Log in to your CyberPanel dashboard as an administrator.
  2. Go to Security > SSL and confirm that SSL is active on the CyberPanel interface itself (required for secure API calls).
  3. The CyberPanel API is available at https://your-server-ip:8090/api/ by default. No additional steps are needed to enable it — it is on by default for admin users.

2. Add Constants to wp-config.php​

Add the following constants to your wp-config.php file before the /* That's all, stop editing! */ line:

define('WU_CYBERPANEL_HOST', 'https://your-cyberpanel-host:8090');
define('WU_CYBERPANEL_USERNAME', 'admin');
define('WU_CYBERPANEL_PASSWORD', 'your_secure_password');
define('WU_CYBERPANEL_PACKAGE', 'Default');

To enable auto-SSL (recommended):

define('WU_CYBERPANEL_AUTO_SSL', true);
define('WU_CYBERPANEL_EMAIL', '[email protected]');

3. Enable the Integration​

  1. In your WordPress network admin, go to Ultimate Multisite > Settings.
  2. Navigate to the Domain Mapping tab.
  3. Scroll down to Host Integrations.
  4. Enable the CyberPanel integration.
  5. Click Save Changes.

4. Verify Connectivity​

Use the built-in connection test in the settings wizard:

  1. Go to Ultimate Multisite > Settings > Domain Mapping > Host Integrations > CyberPanel.
  2. Click Test Connection.
  3. A success message confirms that the plugin can reach the CyberPanel API and authenticate correctly.

How It Works​

Domain Mapping​

When a domain is mapped in Ultimate Multisite:

  1. The integration sends a POST request to /api/createWebsite on your CyberPanel host.
  2. CyberPanel creates a new virtual host for the domain under the configured package.
  3. The document root is set to point to your WordPress network root directory.
  4. When the domain mapping is removed, the integration calls /api/deleteWebsite to clean up the virtual host.

Auto-SSL​

When WU_CYBERPANEL_AUTO_SSL is true:

  1. After the virtual host is created, the integration calls /api/issueSSL for the domain.
  2. CyberPanel requests a Let's Encrypt certificate using the ACME HTTP-01 challenge.
  3. The certificate is automatically renewed by CyberPanel before expiry.

Important: DNS must be fully propagated to your server's IP address before Let's Encrypt can validate the domain. If SSL issuance fails immediately after mapping, wait for DNS propagation and re-trigger SSL from the CyberPanel dashboard under SSL > Manage SSL.

www Subdomain​

If Auto-create www subdomain is enabled in your Domain Mapping settings, the integration also creates a virtual host alias for www.<domain> and, when auto-SSL is on, issues a certificate covering both the apex and www variants.

Email Forwarders​

When the Ultimate Multisite: Emails addon is active, CyberPanel can also provide customer email forwarders. Forwarders route messages from a domain address to another inbox without creating a full mailbox, which is useful for aliases such as [email protected] or [email protected].

Before enabling forwarders for customers:

  1. Confirm the CyberPanel constants above are configured and the connection test passes.
  2. Enable the CyberPanel email provider in the Emails addon settings.
  3. Confirm the customer domain already exists in CyberPanel before creating the forwarder.
  4. Create a test forwarder and send a message through it before offering the feature on production plans.

If forwarder creation fails, check the Ultimate Multisite activity logs first, then confirm in CyberPanel that the source domain exists and that the API user has email-management permissions.

Configuration Reference​

ConstantRequiredDefaultDescription
WU_CYBERPANEL_HOSTYes—Full URL to your CyberPanel instance including port, e.g. https://cp.example.com:8090
WU_CYBERPANEL_USERNAMEYes—CyberPanel admin username
WU_CYBERPANEL_PASSWORDYes—CyberPanel admin password
WU_CYBERPANEL_PACKAGEYesDefaultCyberPanel hosting package to assign to new virtual hosts
WU_CYBERPANEL_AUTO_SSLNotrueIssue a Let's Encrypt SSL certificate after domain creation
WU_CYBERPANEL_PHP_VERSIONNoPHP 8.2PHP version for new virtual hosts (must match a version installed in CyberPanel)
WU_CYBERPANEL_EMAILNo—Contact email for SSL certificate registration

Important Notes​

  • CyberPanel's API uses session-based token authentication. The integration handles token acquisition automatically on each API call.
  • Your CyberPanel admin account must have permissions to create and delete websites.
  • CyberPanel runs on port 8090 by default. If your server uses a firewall, ensure this port is accessible from the WordPress application server.
  • The integration does not manage DNS records. You must point domain DNS to your server's IP address before mapping the domain in Ultimate Multisite.
  • If you use OpenLiteSpeed (OLS), a graceful restart is triggered automatically after virtual host changes. No manual intervention is needed.

Troubleshooting​

API Connection Refused​

  • Verify that port 8090 is open in your server firewall.
  • Confirm the WU_CYBERPANEL_HOST value includes the correct protocol (https://) and port.
  • Check that your CyberPanel SSL certificate is valid; self-signed certificates may cause TLS verification failures. Set WU_CYBERPANEL_VERIFY_SSL to false only in trusted private network environments.

Authentication Errors​

  • Confirm your WU_CYBERPANEL_USERNAME and WU_CYBERPANEL_PASSWORD are correct by logging in to CyberPanel directly.
  • CyberPanel locks accounts after repeated failed login attempts. Check Security > Brute Force Monitor in CyberPanel if lockouts occur.

Domain Not Created​

  • Check the Ultimate Multisite activity log (Ultimate Multisite > Activity Logs) for API error messages.
  • Verify that the package defined in WU_CYBERPANEL_PACKAGE exists in CyberPanel (Packages > List Packages).
  • Ensure the domain is not already registered as a website in CyberPanel — duplicate website creation returns an error.

SSL Certificate Not Issued​

  • Confirm DNS has fully propagated: dig +short your-domain.com should return your server's IP.
  • Let's Encrypt enforces rate limits. If you have recently issued several certificates for the same domain, wait before retrying.
  • Check the CyberPanel SSL logs under Logs > Error Logs for details on certificate issuance failures.
  • As a fallback, you can issue SSL manually from CyberPanel: SSL > Manage SSL > select the domain > Issue SSL.

References​