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  • [Any Version] Forbidden and Not acceptable errors?

    My users and myself are having issues with blank pages, forbidden and not acceptable errors, what can I do?

    There is a very good chance your host has installed a add-on for apache called mod_security.
    ModSecurityTM is an open source intrusion detection and prevention engine for web applications (or a web application firewall). Operating as an Apache Web server module or standalone, the purpose of ModSecurity is to increase web application security, protecting web applications from known and unknown attacks.
    While mod_security can be a very powerful tool, misconfigured or overly strict rule sets can interfere with vBulletins Operation. Below for Apache users you can use an htaccess file and add a specific rule to disable mod_security.

    Make or edit your forum .htaccess file and add the following code
    Code:
    <IfModule mod_security.c>
       SecFilterEngine Off
       SecFilterScanPOST Off
    </IfModule>
    Note, place this file in your main forum directory.

    Should this not work, or you get a 500 Internal Security Error, your host has made it so you're not allowed to make these changes. At this point contact your webhost and ask them to re-tune their mod_security rules. They should be able to look at their logs, find the triggers and make adjustments.
    Last edited by Zachery; Sun 11th May '08, 11:38am.

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