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  • Large Number of "Bad Request" Errors

    Members on a vBulletin installation are complaining of a pesky Bad Request issue. This particular installation is currently sporting a Shoutbox, and the error does indeed occur there as well as many other shoutbox-less pages.

    This isn't something I'm entirely familiar with. Is there any specific apache or MySQL setting which might invoke higher-than-normal instances of this error?

    Code:
    Bad Request
     
    Your browser sent a request that this server could not understand.
     
    Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
    __________________
    I've been around the board quite a bit and never encountered this issue myself. I would ignore it if so many users weren't complaining about it.

    Ideas?

    Thanks,
    Bruce

  • #2
    This may be due to mod_security. Please see this thread for the fix:

    http://www.vbulletin.com/go/modsecurity
    Steve Machol, former vBulletin Customer Support Manager (and NOT retired!)
    Change CKEditor Colors to Match Style (for 4.1.4 and above)

    Steve Machol Photography


    Mankind is the only creature smart enough to know its own history, and dumb enough to ignore it.


    Comment


    • #3
      Thanks Steve! It does sound like it could be mod_security related, but that .htaccess has been in place for a few months now.

      Any other possibilities?

      Comment


      • #4
        It is possible your host is blocking that code from working.

        Try logging in as one of these users to see if you have the same problem. If you don't, then the cause is somewhere on their end. It's impossible to know exactly what it is but some possibilities are: browsers, browser settings, Internet and security settings, ISP and/or cache issues, firewalls, ad-blockers, spyware, proxies and any other application that affects Internet content.
        Steve Machol, former vBulletin Customer Support Manager (and NOT retired!)
        Change CKEditor Colors to Match Style (for 4.1.4 and above)

        Steve Machol Photography


        Mankind is the only creature smart enough to know its own history, and dumb enough to ignore it.


        Comment


        • #5
          I'm on a dedicated server. Is it possible an httpd.conf configuration entry is blocking my mod_security modification from functioning properly?

          I was able to replicate the issue TWICE at random while surfing the boards for about half an hour yesterday.

          Comment


          • #6
            Yes, it's possible. I do not know any specific settings that cause this though. Sorry.
            Steve Machol, former vBulletin Customer Support Manager (and NOT retired!)
            Change CKEditor Colors to Match Style (for 4.1.4 and above)

            Steve Machol Photography


            Mankind is the only creature smart enough to know its own history, and dumb enough to ignore it.


            Comment

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