Maintenance Mode with .htaccess

gistfile1.txt

# serve custom 503 response
ErrorDocument 503 /503.html

# alternate response without custom page
# ErrorDocument 503 "Coming soon!"

#enables mod_rewrite
RewriteEngine On

# If the IP address does not match this one
# Exclude IP 
RewriteCond %{REMOTE_ADDR} !^70.180.241.252$

# And they are not accessing a certain subdirectory
RewriteCond %{REQUEST_URI} !^/503 [NC]
#Or 
#RewriteCond %{REQUEST_URI} !^/503.html$

#allow other files to pass
RewriteCond %{REQUEST_URI} !\.(jpe?g?|png|gif) [NC]

#Set time in sec to tell search engines to recrawl
# 3600 = 60 minutes
# 86400 = 1 day
# 604800 = 1 week
Header always set Retry-After "3600"

# Or provide a redirect url
RewriteRule .* http://yourdomain.com/503.html [R=503,L]
#server default 503 response
#RewriteRule .* - [R=503]
# alternate response without custom page
# RewriteRule .* - [R=503,L]