If you want to customize the error message to a vistor for a page was not found on your server, you can do it by adding following page to the .htaccess file.
ErrorDocument 404 /index.php
this line will redirect visitors to the /index.php on your server.
To prevent people from linking to the images on your server that abusing your bandwidth, you can use the mod_rewrite module to filter the unauthorized requests.
1. Activate Protection
Add the following lines to your .htaccess file to stop people from hotlinking to your .gif and .jpg files.
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?your_domain.com/.*$ [NC]
RewriteRule \.(gif|jpg)$ - [F]
Replace your_domain.com with your domain name.
This starts by turning on the rewrite engine. Next, it checks the referer (where the request comes from).
If it did not come from your domain name and it is a request for a .gif or .jpg file, it will output an error message. Otherwise it will display the image as usual.
You can apply this with other file extension.
When a web browser is pointed to a directory on your web site which does not have an index.html file in it, the files in that directory can be listed on a web page.
1. Enable/Disable Directory Listing
To have the web server produce a list of files for such directories, use this line,
Options +Indexes
To have an error (403) returned instead, use this line.
Options -Indexes
2. Listing Style
You can list file in basic list style or fancy list style. A ‘fancy’ list including icons, file size, modification date and more. Following line is used for ‘fancy’ list style in the .htaccess file,
IndexOptions +FancyIndexing
Use following line if you prefer a basic file list.
IndexOptions -FancyIndexing
3. Ignore Files
If you don’t want the web server to list files with exention such as *.txt,*.jpg. Add this line to your .htaccess,
IndexIgnore *.txt *.jpg
4. Modify Index File
To change the default index file, use this line
DirectoryIndex home.html
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