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Enhanced Image Captcha - Stop bots from signing up! Details »»
Enhanced Image Captcha - Stop bots from signing up!
Version: 2.2, by steadicamop steadicamop is offline
Developer Last Online: Dec 2014 Show Printable Version Email this Page

Category: Miscellaneous Hacks - Version: 3.7.6 Rating:
Released: 06-06-2008 Last Update: 06-08-2008 Installs: 293
Uses Plugins Auto-Templates
Additional Files Translations  
No support by the author.

Title : Enhanced Image Captcha

Version : 2.2b

VB Versions : Currently working and tested on 3.8.4 (as of Dec 2014)

Coder : Andy Calderbank & Jason Williams

Purpose : Add extra Image Verification to the registration process, using an alternative system to the Captcha system.

The Enhanced Image Captcha system is a unique system using images versus text to stop spammers signing up to your forum. The script automatically detects images and uses the filename as the title, making adding new images extremely simple. To further improve security, the images are passed through a script which means that none of the images on the screen have file names - and cannot be associated to the question by title alone - and cannot be viewed by trying to access the images directly.

Please note, there is a .htaccess file within the images directory, to keep security tight, this must be kept, without it bots are able to scan the images and make a match, I understand not every server can utilist .htaccess but cannot get around this.

Important : This has been tested on 3.7 and 3.6.2 - as far as I know this should be backwards and forwards compatible.

My thanks go to all the guys who have helped with this, all the suggestions and feedback, all has been take on board and where necessary included in this new version - members in particular are : King Kovifor, Danny.VBT, Lynne and RCK.

Also thanks to ogameclub for the Turkish translated version.

I must thank Opserty too for their hard work in making me understand where I was going wrong!!

New features from original 1.11 release!!

Admin settable options:
  • Number of images to display
  • Path to image directory (so you can change if you prefer)
  • Resize image between 50% - 150% of original image
  • Number of images to display before a line break (see History)
  • Enable/Disable
Demo : http://www.steadiforum.net/register.php

I hope this is help to the VBulletin community as I know this is a growing problem. I don't fancy the thought of trawling through hundreds of new members deleting stupid usernames and spam posts.

Installation :
  1. Upload show.php to your forum root directory (or wherever register.php is).
  2. Upload the images/verification directory, this can be moved to the forum root or have the verification name changed, but needs updating in the Enhanced Image Captcha AdminCP options.
  3. Import Product - product-enhanced_image_captcha.xml
  4. Make sure that you check that the Images Path is correct in AdminCP -> VBulletin Options -> Enhanced Image Captcha.
  5. You can also select how many images and what size from the original you would prefer.
Upgrading:
  1. Import Product - product-enhanced_image_captcha.xml - overwrite if necessary.
  2. Set any options you need in AdminCP -> VBulletin Options -> Enhanced Image Captcha.
Upgrading from v1.xx :
  1. Remove the images/verification directory and all images inside.
  2. Uninstall the product - Enhanced Captcha Image Verification - important for phrase and template removal!
  3. Upload show.php to your forum root directory (or wherever register.php is).
  4. Upload the images/verification directory, this can be moved to the forum root or have the verification name changed, but needs updating in the Enhanced Image Captcha AdminCP options.
  5. Import Product - product-enhanced_image_captcha.xml - overwrite if necessary.
  6. Make sure that you check that the Images Path is correct in AdminCP -> VBulletin Options -> Enhanced Image Captcha.
  7. You can also select how many images and what size from the original you would prefer.
Requirements : GD Libraries installed

File uploads : 53 (including images)
Files to Import : 1
New Templates : 2
New Phrases : 15
Uses Hooks : 1
New Queries : 0

History :
v2.0b
  • Original Beta release
v2.1b
  • Added Enable/Disable Option
  • Also added Turkish Translated version
  • Added new image page
v2.2b
  • Bug Fix : Opera browsers, any number over around 8 images disappears over side of screen, added number of images before line break function to stop this happening
Don't forget you don't have to use the provided images - you can customise these to any you wish - I've used ones that are hopefully universal and everyone will recognise.

Show Your Support

  • This modification may not be copied, reproduced or published elsewhere without author's permission.

Comments
  #112  
Old 07-12-2009, 07:19 PM
Fred. Fred. is offline
 
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Quote:
Originally Posted by Oblivion Knight View Post
Try this modification aswell:
https://vborg.vbsupport.ru/showthread.php?t=208088

BotScout Register Check.
thanks, testing it now and looks good.
No problems so far.

Quote:
Originally Posted by vidar808 View Post
I wish that I could ban users or block users IP's for a set amount of time, automatically, if they get the image incorrect a number of times.
That's one of the things that i've been missing too. I hope to see it soon in one of the next versions.
A few nights ago my VPS went down when a bot was hammering the register.php with e few hundred requests/ second. at 4.26 AM not so funny.
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  #113  
Old 07-13-2009, 08:22 AM
Shogo Shogo is offline
 
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Thanks for this mod

But I still have spam bots registration on my board : 1 or 2 per day (Wow Gold, Cialis, Viagra, ...)
How is it possible?

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  #114  
Old 07-19-2009, 05:05 PM
yeku yeku is offline
 
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Installed, thank
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  #115  
Old 07-31-2009, 10:13 AM
OcR Envy's Avatar
OcR Envy OcR Envy is offline
 
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Amazing mod since installing I haven't had a single bot register.
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  #116  
Old 09-13-2009, 01:38 AM
infnity8x3 infnity8x3 is offline
 
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I installed, and agree that a strike out system where the bot/person has to wait X amount of minutes per Y amount of failed tries. Thanks Author!

-=[INSTALLED]=-
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  #117  
Old 09-13-2009, 05:21 AM
NTMID8 NTMID8 is offline
 
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Thanks! Tired of all the spammers.
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  #118  
Old 09-30-2009, 02:20 AM
joeydood joeydood is offline
 
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an answer for the following issue MUST come forth!

Warning: dir(images/verification) [function.dir]: failed to open dir: No such file or directory in [path]/register.php(204) : eval()'d code on line 9

Fatal error: Call to a member function on a non-object in /home/rocketma/public_html/forums/register.php(204) : eval()'d code on line 10

this post makes the 7th or 8th unanswered issue of this nature.
ask all the clarification questions you like, i'll answer them to the extent of my 30-years of coding's experience allows.

otherwise i vote A+ for concept and effort and f-- (that's an f double minus) for support. since my registration process will not work at all with this mod installed.

The road to hell is paved with good intentions and bad software
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  #119  
Old 09-30-2009, 03:34 PM
joeydood joeydood is offline
 
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sorry for the rant - you know how it goes when its late and you're aggrivated.
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  #120  
Old 12-10-2009, 11:03 AM
KubisForce KubisForce is offline
 
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Hi,

I want this to be fully localised. Therefore I thought its best to rename the images to eg "A Bird_ein Vogel". But for this I would need a code that searches for the string before or after the _ depending on the language. Since I am not skilled with PHP can anybody help me out?

Greets
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  #121  
Old 12-14-2009, 09:23 PM
Slam Da Brakes Slam Da Brakes is offline
 
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Just want to say want a super little add-on.

I was getting around 10- 15 bots a day and now none! It has only been two days (early days yet) but at least this has made my life easier and for my forum staff more managable to delete them. I am sure one or two will slip past, but that, we can handle!

Would like a huge favour. Does anyone know how to customize the pics and phrase? I run an Xbox site and would like the captcha be an Xbox related phrase and answer.

Would I change the phrase through phrase manager?
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