HTACCESS is a file located in the root directory that allows webmasters to do more advanced features such as rewrite urls, deny ip adresses and add header expires(for faster loading). However, there is some order to follow since the deny ip addresses must be on the bottom. If not, they will write to that location when you deny an ip address in cpanel. If the deny ip addresses are not on the bottom, you may see the following error message.

 Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@website.address.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

Apache/2.2.17 (Unix) mod_ssl/2.2.17 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 mod_perl/2.0.4 Perl/v5.8.8 Server at www.website.address.com Port 80