WordPress Multisite on BlitzPress

Setting Up WordPress Multisite

WordPress Multisite lets you run multiple WordPress sites from a single installation. On BlitzPress with OpenLiteSpeed, both subdomain and subdirectory configurations are supported.

Subdomain vs Subdirectory

Type	URL Pattern	Requirements
Subdirectory	example.com/site1	Simpler setup, single SSL cert
Subdomain	site1.example.com	Wildcard DNS, wildcard SSL

Step 1: Enable Multisite in wp-config.php

Add this constant before the “stop editing” line:

define( 'WP_ALLOW_MULTISITE', true );

Then go to Tools > Network Setup in WordPress admin and follow the prompts.

Step 2: Add Required Constants

After running the Network Setup, WordPress gives you constants to add to wp-config.php:

define( 'MULTISITE', true );
define( 'SUBDOMAIN_INSTALL', false ); // true for subdomains
define( 'DOMAIN_CURRENT_SITE', 'example.com' );
define( 'PATH_CURRENT_SITE', '/');
define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );

Step 3: OLS Configuration

For subdirectory multisite, the standard WordPress rewrite rules work. For subdomain multisite, you need:

1. Wildcard DNS: Add a wildcard A record (*.example.com) pointing to your server
2. Wildcard SSL: blitzpress ssl:wildcard example.com
3. OLS listener map: Add *.example.com to the vhost listener

Step 4: OLS Rewrite Rules for Multisite

Subdirectory multisite needs special rewrite rules in vhconf.conf:

RewriteRule .* - [E=noabort:1]
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php [L]

Managing Network Sites

# List all sites
sudo wp site list --path=$WP --allow-root

# Create a new site
sudo wp site create --slug=newsite --title="New Site" --path=$WP --allow-root

# Delete a site
sudo wp site delete 2 --yes --path=$WP --allow-root

Important Notes

• Multisite must be set up on a fresh WordPress install or early in the site’s life
• Some plugins are not multisite-compatible — test before deploying network-wide
• Super Admins manage the network; regular admins manage individual sites