FlashPanel

OpenLiteSpeed ​

OpenLiteSpeed is an open-source web server from LiteSpeed Technologies, known for its high performance and built-in LiteSpeed Cache, which makes it a great fit for WordPress. Each server uses one web server only: Nginx, Apache, or OpenLiteSpeed.

Install OpenLiteSpeed ​

  1. Open the server's Applications page and choose the Not Installed tab.
  2. Find OpenLiteSpeed and click the Install button (download icon).
  3. Enter the Admin Password for the OpenLiteSpeed admin panel (the default account is admin), then click Install.

Manage OpenLiteSpeed ​

After installation, choose OpenLiteSpeed in the server menu. This page has:

  • The WebAdmin button: opens the OpenLiteSpeed admin panel at https://SERVER_IP:7080.
  • The service status and buttons to start, restart, stop, and view the configuration and logs.
  • The Update LiteSpeed Admin card: change the admin panel's Admin Username and Admin Password. Click the refresh icon to generate a random password, then click Update.
  • The PHP Extensions card: install or remove PHP extensions for OpenLiteSpeed.
  • The PHP Versions table: the PHP (LSPHP) versions and their installation status. Click Install to add a version.

PHP configuration ​

Each installed PHP version appears under the server's PHP menu (for example PHP > PHP 8.3). Each version's page has an Update php.ini configuration form for settings such as memory_limit, upload_max_filesize, post_max_size, and max_execution_time:

  1. Click Recommended to fill in recommended values, or adjust each option yourself.
  2. Click Update to save.

Click Open php.ini to view the whole configuration file. The options mean the same as in Update PHP.ini Configuration.

413 Request Entity Too Large ​

This error appears when uploading a file larger than PHP's limit. Open PHP > the PHP version your website uses, increase upload_max_filesize and post_max_size, then click Update.

Access OpenLiteSpeed WebAdmin ​

Click the WebAdmin button on the OpenLiteSpeed page (or open https://SERVER_IP:7080) and log in with the Admin Username/Admin Password.

On first access, your browser warns that the connection is not secure (for example Your connection is not private, NET::ERR_CERT_AUTHORITY_INVALID). This is expected because WebAdmin uses a self-signed certificate by default. You can either bypass the warning or install a real SSL certificate for WebAdmin.

Option 1: Bypass the warning ​

  • Chrome, Edge: click Advanced, then click Proceed to ... (unsafe).
  • Safari: click Show Details, click the visit this website link, then click Visit Website to confirm.
  • Firefox: click Advanced..., then click Accept the Risk and Continue.

Option 2: Install an SSL certificate for WebAdmin ​

  1. Create a website in FlashPanel on this server with the domain you want to use for WebAdmin (for example admin.example.com), and point the domain to the server IP.

  2. Install SSL for that website. In the certificate table on the SSL page, note the number in the ID column (for example 101082).

  3. Open a terminal as root and run the commands below (replace 101082 with your certificate ID):

    bash
    CERT_DIR=/root/.flashpanel/certificates/101082
ls $CERT_DIR/server.key $CERT_DIR/server.crt
sed -i "s#[^[:space:]]*admin/conf/webadmin#$CERT_DIR/server#" /usr/local/lsws/admin/conf/admin_config.conf
/usr/local/lsws/bin/lshttpd -t && systemctl restart lsws

    The ls command must list both files. If it reports they are missing, the certificate may be stored in /usr/local/lsws/conf/cert/101082; in that case set CERT_DIR to that path.

  4. Open WebAdmin at https://admin.example.com:7080.

TIP

When the certificate is renewed, restart OpenLiteSpeed (on the OpenLiteSpeed page) so WebAdmin uses the new certificate.

LiteSpeed Cache for WordPress ​

LiteSpeed Cache (LSCache) is built into OpenLiteSpeed. It significantly speeds up PHP pages, serves static files more efficiently, and reduces server load. To use it with WordPress:

  1. In the WordPress dashboard, go to Plugins > Add New.
  2. Search for LiteSpeed Cache, click Install Now, then Activate.
  3. Check that caching works at Check LSCache.

Redirects on OpenLiteSpeed ​

OpenLiteSpeed automatically reads rewrite rules from the .htaccess file in the website's root folder, so the simplest and most durable approach is to add rules there. Example redirecting /index.html to /admin.html (301):

apache
RewriteEngine On
RewriteRule ^index\.html$ /admin.html [R=301,L]

If the change does not take effect, restart OpenLiteSpeed on the OpenLiteSpeed page.

WARNING

Avoid editing the website's Virtual Host configuration in WebAdmin. FlashPanel regenerates this configuration when you change the website (for example installing SSL or changing the PHP version), so manual changes can be lost.