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I want to prevent site to be accessible by ip. It could be accessible by only domain name, so I tried with htaccess trick.

RewriteCond %{HTTP_HOST} !^mydomain\.com [NC]
RewriteRule .? http://mydomain.com%{REQUEST_URI} [R=301,L]

It did the trick now my siteurl is changed to mydomain.com instead of my ip. But as per my knowledge its not complete solution. Whenever I change permalinks new htaccess will be generated so above condition will be removed.

So I thought I have to try in index.php, tried to redirect if ip is there in url by following:

if(strpos($_SERVER['HTTP_HOST'],'') !== false) {      
header("Location: mydomain.com".$_SERVER['REQUEST_URI']);

but it did nothing still site accessed by ip. Let me know if my approach is right or not. Suggest me anything else if there.

share|improve this question
up vote 2 down vote accepted

WordPress does not create a complete new .htaccess. It just rebuilds the part between the WordPress markers:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress

Any rule placed outside of this block will not be touched.

share|improve this answer
Thanks @toscho.. Lack of knowledge.. – Kamal Oct 30 '12 at 12:19

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