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airwizsun
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PostPosted: Wed Apr 22, 2009 11:11 am    Post subject: Re: http://script.34SP.com Reply with quote
imknight wrote:

Advanced guestbook - an example of this can be found at http://guestbook.example.34sp.com/

This guestbook - has flood protection, profanity filters and captcha images, IP banning all in an effort to try to aid in the cutting down of posts from spambots.

Any queries or issues with any of the installers please do let us know.


On my board I get a lot of spammers registering so May I ask if this guestbook will help to stop that?

My site is phpBB3 v2

Yannis
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imknight
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PostPosted: Wed Apr 22, 2009 8:33 pm    Post subject: Reply with quote
No the guestbook is a seperate script and will have no bearing on a different script.

Doesnt phpBB3 already have captcha support built into it?
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Ian
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airwizsun
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PostPosted: Wed Apr 22, 2009 9:31 pm    Post subject: Reply with quote
imknight wrote:
No the guestbook is a seperate script and will have no bearing on a different script.

Doesnt phpBB3 already have captcha support built into it?


Yes it does have an image Captcha but it doesn't stop them and I have to find the way to stop them.

As you are the experts on these matters, can you please tell me your opinion about this solution that I came accross please.

http://eclecticdjs.com/forum/stop_forum_spammers.php

Thank you in advance.
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philr
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PostPosted: Wed Apr 22, 2009 11:12 pm    Post subject: Reply with quote
The main problem here is that you're using phpBB, which is one of the most popular open-source forums on the web. Spammers have already cracked the captcha system used by this software, allowing them to spam thousands of sites without any effort at all.

I've taken a quick look at the page you linked to, and I wouldn't recommend using it, especially if the forum you're referring to is russianworldforums.com. If you install this "fix", then everyone with websites or email addresses that end in .ru would be told to "get lost". The same applies to anyone with a Blogspot account (although I suppose that's understandable).

I think it would be more worthwhile developing a custom captcha for your website. Jeff Atwood's blog at codinghorror.com has been using the same trivial captcha for years now (always the same word: "orange"). I think he blocks Blogspot URLs too, but there's nothing too sophisticated going on.
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Phil Ronan
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airwizsun
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PostPosted: Thu Apr 23, 2009 7:17 am    Post subject: Reply with quote
Phil

Thanks for your reply and I had a look at Jeff's site. Obviously a simple solution to stop the robots registering automaticaly.

I just finished a new site, hosted in your servers http://www.racescars.co.uk and there I am using a form with a captcha, which asks for a random number to be answered........ At the moment it's not a very difficult question but I can always make it mor difficult, if I want by changing the range of numbers.

Have a look and let me know what do you think?

http://www.racescars.co.uk/form/contactus.php

If you think that is a better solution so a human has to answer an intelliegent question then I will have to try and modify the registration page on my board.....russianworldforums.com and hopefully will stop the majority of spam.

Of course it will not stop the human's but then that is not a big problem, as I get instant notficatication and can react and ban the offender and also delete the span in one go.

Thanks for your help
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philr
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PostPosted: Thu Apr 23, 2009 10:41 am    Post subject: Reply with quote
airwizsun wrote:
I just finished a new site, hosted in your servers http://www.racescars.co.uk and there I am using a form with a captcha, which asks for a random number to be answered........ At the moment it's not a very difficult question but I can always make it mor difficult, if I want by changing the range of numbers.

Have a look and let me know what do you think?

Unfortunately the 34sp servers aren't mine

Using an addition sum as a captcha should be fine for the time being, but there are a lot of sites that use this technique now (here are some examples). This makes them a juicy target for spammers, because they're easy to crack with a simple bit of string matching and arithmetic. Using larger numbers would have no effect on the computational complexity, and would just make the questions harder for genuine visitors.

airwizsun wrote:
If you think that is a better solution so a human has to answer an intelliegent question then I will have to try and modify the registration page on my board.....russianworldforums.com and hopefully will stop the majority of spam.

It shouldn't be too hard to replace phpBB's default captcha generator with something else. As long as you're not using the exact same software as everyone else, then even the simplest measures can prevent spam. I used to get a bit of spam through the contact page on my website until I added a drop-down menu for people to specify the subject of their message. I've had no problems since — the spambots just leave it in the default state and hope for the best.
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imknight
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PostPosted: Thu Apr 23, 2009 11:47 am    Post subject: Reply with quote
Just done a quick search and seems someone has wrote a reCaptcha mod for phpbb3

http://startrekguide.com/community/viewtopic.php?f=127&t=9549

Maybe worth giving this a try, make sure you backup any files you are going to change first though!
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Ian
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airwizsun
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PostPosted: Thu Apr 23, 2009 4:36 pm    Post subject: Reply with quote
Ian

I will have a try and see if I can install this modification.

Actually I came accross this type of Captcha in a commercial site......but I forgot which one....

I will let you know if it goes well..... or start asking for help again...LOL

Thanks for all your help.
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