Merge branch 'skilledDeveloper-master'

README.md

@@ -34,10 +34,13 @@ What we are doing here is mostly collecting useful snippets from all over the in
     - [Disable Image Hotlinking for Specific Domains](#disable-image-hotlinking-for-specific-domains)
     - [Password Protect a Directory](#password-protect-a-directory)
     - [Password Protect a File or Several Files](#password-protect-a-file-or-several-files)
+    - [Block Visitors by Referrer](#block-visitors-by-referrer)
+    - [Prevent Framing the Site](#prevent-framing-the-site)
 - [Performance](#performance)
     - [Compress Text Files](#compress-text-files)
     - [Set Expires Headers](#set-expires-headers)
     - [Turn eTags Off](#turn-etags-off)
+    - [Disable gzip Compression](#disable-gzip-compression)
 - [Miscellaneous](#miscellaneous)
     - [Set PHP Variables](#set-php-variables)
     - [Custom Error Pages](#custom-error-pages)
@@ -283,6 +286,24 @@ Require valid-user
 </FilesMatch>
 ```
 
+### Block Visitors by Referrer
+This denies access for all users who are coming from (referred by) a specific domain.
+[Source](http://www.htaccess-guide.com/deny-visitors-by-referrer/)
+``` apacheconf
+RewriteEngine on
+# Options +FollowSymlinks
+RewriteCond %{HTTP_REFERER} somedomain\.com [NC,OR]
+RewriteCond %{HTTP_REFERER} anotherdomain\.com
+RewriteRule .* - [F]
+```
+
+### Prevent Framing the Site
+This prevents the website to be framed (i.e. put into an `iframe` tag), when still allows framing for a specific URI.
+``` apacheconf
+SetEnvIf Request_URI "/starry-night" allow_framing=true
+Header set X-Frame-Options SAMEORIGIN env=!allow_framing
+```
+
 ## Performance
 ### Compress Text Files
 ``` apacheconf
@@ -390,7 +411,6 @@ By removing the ETag header, you disable caches and browsers from being able to
 FileETag None
 ```
 
-
 ## Miscellaneous
 
 ### Set PHP Variables
@@ -478,4 +498,4 @@ RewriteCond %{HTTP_ACCEPT} image/webp
 RewriteCond %{DOCUMENT_ROOT}/$1.webp -f
 RewriteRule (.+)\.(jpe?g|png)$ $1.webp [T=image/webp,E=accept:1]
 ```
-[Source](https://github.com/vincentorback/WebP-images-with-htaccess)
+[Source](https://github.com/vincentorback/WebP-images-with-htaccess)