Apache Access Control done right in WordPress .htaccess, ‘Allow/Deny from all’ versus ‘Require All Granted/Denied’
Since Apache 2.4.6, a new module is used to configure and set up access control for websites: mod_authz_core. This means you have to use a different syntax for allowing or blocking hosts and IP addresses to your website. But unfortunately, old documentation is never updated and people even still write blog posts using that old syntax, leaving you with an unprotected website. Not what you had in mind, now is it?…
I see it all to often: blog posts telling you to use the following snippet in a
.htaccess file to secure / protect WordPress’
<Files wp-config.php> Order Allow,Deny Deny from all </Files>
This is wrong! Wrong! Wrong!
Unfortunately this does not work with Apache 2.4.6 and higher! And I find it hard to believe so called “WordPress Security” companies still write posts explaining the old, non-functional, syntax without even mentioning the new, correct syntax…
Satisfy, Order, Deny and Allow have all been deprecated and replaced with new Require directives.
Yes, there is Apache’s
mod_access_compat, that provides compatibility for old directives like Order, Allow, Deny and Satisfy. But depending on such a module is not recommended, since it’s deprecated by mod_authz_host: https://httpd.apache.org/docs/2.4/mod/mod_access_compat.html.
So now, for once and for all: here is how to use the new Apache 2.4.6+
mod_authz_host syntax in your WordPress .htaccess files:
# Protect wp-config.php <Files wp-config.php> Require all denied Require ip 198.51.100.15 # substitute with your IP address </Files>
For compatibility with older Apache versions, you can wrap this up in a condition:
<Files wp-config.php> # Apache 2.2 <IfModule !mod_authz_core.c> Order Deny,Allow Deny from all Allow from 198.51.100.15 </IfModule> # Apache 2.4 <IfModule mod_authz_core.c> Require all denied Require ip 198.51.100.15 </IfModule> </Files>
Note: by using .htaccess files you leave Nginx and IIS web servers unprotected! You can use .htaccess in IIS though, but don’t rely on just .htaccess files for your website defense.
This is not just for WordPress, but for all websites hosted on Apache (Drupal, Joomla, …). Another change is the syntax to block an IP address in .htaccess. Where you used to use the following:
Order Allow,Deny Allow from all Deny from 203.0.113.0/24
Don’t use this above .htaccess code! You now have to use mod_authz_core syntax again:
<RequireAll> Require all granted Require not ip 203.0.113.0/24 </RequireAll>
For example, to deny all requests for
*.php files you can use:
<Files *.php> # Apache 2.2 <IfModule !mod_authz_core.c> Order Deny,Allow Deny from all </IfModule> # Apache 2.4 and up <IfModule mod_authz_core.c> Require all denied </IfModule> </Files>
It is important to block access to WordPress’ debug.log file in
wp-content/. Or all log files for that matter, as they contain important information about your website and possibly even passwords.
Use mod_rewrite to simply block requests to
RewriteEngine On RewriteRule \Q.log\E - [F,L,NC]
Here, \Q and \E are used to remove the special meaning from a sequence of characters.
If you want to remove the special meaning from a sequence of characters, you can do so by putting them between \Q and \E. The \Q…\E sequence is recognized both inside and outside character classes.Regular expression syntax
But as with the example above, you could also use a
<Files "debug.log"> ... </Files> block in your .htaccess file. I just wanted to show you more than one way.
Hope this helps! :)
My name is Jan. I am not a hacker, coder, developer or guru. I am merely a systems administrator, doing my daily thing at Vevida.
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