.htaccess rules to place site in maintenance mode, but allow certain IP Address through

.htaccess

RewriteEngine On

# Allow through given IP Address
RewriteCond %{REMOTE_ADDR} !^95\.128\.11\.149

# Check for presence of Maintenance Page
RewriteCond %{DOCUMENT_ROOT}/maintenance.html -f

# Check for presence of enable file
RewriteCond %{DOCUMENT_ROOT}/maintenance.enable -f

# Allow common page assets through
RewriteCond %{REQUEST_URI} !\.(jpe?g?|png|gif|css|js|svg|ico) [NC]

# Match against any request which isn't our maintenance page
RewriteCond %{SCRIPT_FILENAME} !maintenance.html

# Rewrite the URL to our maintenance page
RewriteRule ^.*$ /maintenance.html [R=503,L]

# Set our maintenance page as the default page for 503 errors (maintenance mode)
ErrorDocument 503 /maintenance.html

# Prevent caching of maintenance page
Header Set Cache-Control "max-age=0, no-store"