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"CAPTCHA for Guest Searches" -- why/when to use it?

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  • "CAPTCHA for Guest Searches" -- why/when to use it?

    Ver. 3.6.1 has a new feature:
    CAPTCHA for Guest Searches - you may now optionally force guests to prove they are human before searching
    In which situations should one consider using this feature?

    Thanks.

  • #2
    Well, someone could use the search system agasint a large forum

    Comment


    • #3
      Originally posted by Zachery View Post
      Well, someone could use the search system agasint a large forum
      What do you mean by "against"?

      Couldn't someone that types the captcha still use the search system against a large forum?

      Comment


      • #4
        It takes time to enter the captcha, thus slowing down or stoping automated attackers

        Comment


        • #5
          So using the CAPTCHA would also prevent SEO?

          Comment


          • #6
            How do you figure this?

            Comment


            • #7
              I would assume it's to stop people from hammering the search, thus slowing down the server. Ideally, the database should handle the searching entirely and vBulletin shouldn't need its own index at all, but MySQL sucks and Jelsoft needed to implement a solution.

              You can enable a floodcheck, but I hate search floodchecks. I do a search, don't find what I want, and am punished by waiting 15 seconds until I can submit a different query.
              --filburt1, vBulletin.org/vBulletinTemplates.com moderator
              Web Design Forums.net: vB Board of the Month
              vBulletin Mail System (vBMS): webmail for your forum users

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              • #8
                We found a bot last year spamming every possible form with the URL to a casino site, this was coming from multiple Ip addresses. When I logged into this customers server I found there was 400 searches running and the site was unusable. I got him to disable guests for searches and its been working fine since.

                The MySQL Fulltext solution is what had the problem not our own vBulletin index, it correctly noticed it was a URL and ignored the problem.
                Scott MacVicar

                My Blog | Twitter

                Comment


                • #9
                  I don't understand this. How could a spambot spams through search.php? Or was it only trying to exhaust the bandwidth, which is understood in such case? Also I don't see how should MySQL should react regarding this so as not to blamed for the problem? Of course I am not blaming vBulletin here either.
                  You're spending millions of dollars on a website?!

                  Comment


                  • #10
                    Search puts a very high load on forums with lots of threads and posts as it needs to trawl the entire database each time you search. Now imagine doing it 400 times. Thats 400 times it has to look throuh the whole database plus all the other stuff going on in a forum.

                    Comment


                    • #11
                      The bot was visiting every page and just posting a URL, it didn't care if it was getting anywhere.

                      So it posted search.php with a forum id of every forum. It also posted ocntact us and login etc.
                      Scott MacVicar

                      My Blog | Twitter

                      Comment


                      • #12
                        What is captcha? is that the little image with the letters & numbers that have to be entered if someone wants to register or make a post or send a message to admin?
                        Arcade.gs Game Site!

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                        • #13
                          Yep.

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