[TYPO3] Unable to Clear FE Cache
Michael Baker
mbaker at pobox.com
Fri Jul 6 01:45:48 CEST 2007
I wrote:
> I'm using Typo3 3.8.1 and I'm unable to clear the front end cache.
> Everytime I try I get the message:
>
>
> Precondition Failed
>
> The precondition on the request for the URL /typo3/tce_db.php
> evaluated to false.
>
> ------------------------------------------------------------------------
> Apache/1.3.33 Server at www.frickers.co.uk Port 80
>
>
> ... What do I need to do to clear the cache?
I've discovered that this is an Apache error message. The Apache error
log contained the following:
[Thu Jul 5 15:59:41 2007] [error] [client 203.26.206.130] mod_security:
Access denied with code 412. Pattern match
"\\\\.php\\\\?.*=(https?|ftp)\\\\:/.*(cmd|command)=" at REQUEST_URI
[severity "EMERGENCY"] [hostname "www.frickers.co.uk"] [uri
"/typo3/tce_db.php?vC=123a52138f&redirect=http%3A%2F%2Fwww.frickers.co.uk%2Ftypo3%2Falt_menu.php&cacheCmd=all"]
[unique_id "Ro0HXVBScZUAAIEC69A"]
In a message to this list dated 10/03/2006, with subject Re: [TYPO3]
error when clearing FE cache, Christoph Koehler
<christoph.koehler at gmail.com> wrote:
> I guess this is caused by mod_security. ... Adding
>
> SecFilterEngine off
>
> to my .htaccess file did the trick. Maybe someone more knowledgable can
> take a look at this and figure out why it is happening.
Which is what I've done, and it has worked. However I have no idea why
or how this works.
Michael.
--
Dr Michael Baker +61 8 8121 8343 www.michael-baker.com
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