send specific visitor (IP) a special page?

[wvoyance]

I know I can block some specific IP by
order allow,deny
deny from 210.242.215.197/32
allow from all

But could I send them a specific page?
Those visitors are really nuscent I want to tell them do not come again.

[Celauran]

Why not use a PHP header redirect?

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header('Location: foo');

[wvoyance]

Why not use a PHP header redirect?

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header('Location: foo');

Then, they can still access other pages, to my understanding.

[Celauran]

Not necessarily. You can easily put the blacklist code in one of your included files or your front controller, depending on how your site is set up. In either scenario, every request will see this code called and the undesirables redirected away. Unless, of course, they come in through a proxy of some sort.

[wvoyance]

Why not use a PHP header redirect?

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header('Location: foo');

Could this command redirect only some visitor, not all?
I would like to redirect some visitor

[Celauran]

Well yes, of course. Wrap it in a conditional.

[VladSun]

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header('Location: foo');
exit(); // !!!!

[pickle]

I believe you can do it in mod_rewrite & therefore in your .htaccess file like your original post:

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1. RewriteCond %{REMOTE_HOST} ^210\.242\.215\.197 
2. RewriteRule .* /offline.php [R=302,L] 

I'm not entirely sure how to do it with IP ranges though

[Celauran]

The problem with using .htaccess is that you'd need a new entry for each IP or CIDR value versus being able to query a database if you do it in PHP.

[wvoyance]

Is every sub-directory which has an index.php need a .htaccess?

I put a .htaccess as the root directory but does not seems to be able to prevent access of some directories.
Put more .htaccess at those directories seems become o.k.
I found those directories seems all contain an index.php

[pickle]

No, an .htaccess file is supposed to be applied to every subdirectory. I'm not sure if there are Apache directives that can be changed which make .htaccess only apply to the current directory, but I've always had them apply to ancestor directories.