still getting spam

I am running 2.3.1 and I am getting many spams to my board, I managed to implement another verification code to have double the security, but I am still getting spam, and I dont believe the people are actually visiting the site to spam the board. I have renamed the folder, renamed the php script, and even tried to make a password in order to post (which I wasnt able to get working) so my questions are:
1) what can I do?
2) is there any way I can tell through the script if they are visiting the site board, or if it is just the php file for posting?

Update to 2.4.2

From what I hear and have read, 2.4.2 still gets spam as well. I was just trying to figure out if there was any other options to see if the spammers are coming directly to the board, or if they are just using the php file, and more ways of securing the form.

They use a search engine to find all sites running Advanced Guestbook and the exact url of it. Best thing to do is rename the folder it is in and add that folder to your robot.txt file.

I have already renamed the folder twice.

But did you tell the search engines not to list it? That is what the robot.txt file is for or the no index meta tag.

I have changed the name of the guestbook where do you have to put the robot txt as I cannot see a file with this name?

The robots.txt is to be in your root directory. Usually you have to make one yourself.

What you will want to put in it is

User-agent: *
Disallow: /nameoffolder/

And the bots should not index this folder, or even scan it.
If you do not have a robots.txt you will have to make one, then throw it over to your server. but you want to make sure you name robots.txt all in lower case. It will not work otherwise.

Thanks I will try that to see if it helps, also since renaming my folder none of the pics or smilies work has it broken a link changing the file name?

Did you change the base url in your config.inc.php?
$GB_PG["base_url"] = ""; /* e.g http://www.yourdomain.com/nameoffolder*/

It seems that somewhere the [base_url] was not changed.

Thanks I have changed the base URL and all is now working. I am still confused about the robot file is there any where that lists how to do this step by step. I am not even sure where to put the folder and do I just need to add a text document to stop the robots. I have a parent directory and a www directory where all the files are which one would the folder need to be in and does the guestbook folder need to be in there or just the name of it

http://www.robotstxt.org/

the robots.txt goes in the www directory, because that is the website root directory.

and this goes in that robots.txt in the websites root directory

User-agent: *
Disallow: /nameoffolder/

If you have the / behind the name of folder then it will not block anything else that may happen to be named the same
for example if you dont put it there and you put this in your robots.txt
User-agent: *
Disallow: /image
then it will block anything named image, any pictures, html, or folders. so it is very important to put the / there.
And like carbonize suggested there is that website for more help

Thanks to both of you have done this now lets hope it stops the posts

I am glad I could help.

I hope it stops the posts too.