Weird problem in errorlogs

I'm having a weird problem with Apache 2.2. The errorlogs show something
like this:

[Wed Jan 11 10:34:23 2006] [error] [client x.x.x.x] client denied by server
configuration: /var/www/index.php

But that file doesn't exist. /var/www/index.html does exist so the page
loads up correctly. This happens with numerous files on our site but pages
are loading correctly because the files xxx.html are there. It's also
strange that the errors always complains it can't find index.php (always a
php file).

Any clues?

Davide Bianchi <davideyeahsure@onlyforfun.net> wrote in
news:slrndsaa49.1dd.davideyeahsure@t42.onlyforfun. net:

> On 2006-01-11, Marvin <test@test.com> wrote:
>> [Wed Jan 11 10:34:23 2006] [error] [client x.x.x.x] client denied by
>> server configuration: /var/www/index.php
>>
>> But that file doesn't exist.
>
> This doesn't matter if someone _explicitly_ require that file. It
> looks to me that is some kind of script-kiddies attack, looking
> explicitly for .php files to see if there are known vulnerabilities.
>
> Davide
>

The thing is, if I access the webpage, I immediately get the error as well
(and I'm not running any script attacks that I'm aware off).