How to block spam robots ?

I am new to this section ....

I receive spam registrations by register robots.

Can i stop them by robot.txt ? If yes , then how ?

Please suggest me ... thanks for your time.

 

Nah you can't stop em with the robots.txt, only the "good" robots care about it.
But you can make an image verification, that will stop most of them.
If you tell us where they are registering (which application), we might help you better

 

yup image verification will stop most of them, better known as Captcha

 

you can not stop them with robots.txt file . using number verifaction or Captcha is going to solve your problem

 

Yeah i have seen it on many sites like "blogger" etc ...

Surly i gonna go for this alternative.

anyways thanks for your precious comments.

 

i wish you could stop them.

 

Yeah i do !!

 

The man in your avatar is seriously suffering from multiple hernias. He's poking out everywhere!!

 

Presumably they also come from the same ip every time so you could edit your htaccess to deny that specific ip. I would say the robots.txt file is the easiest and most concise method though!

 

how do i block IP's with htaccess

and

how do i know which IP is SPAM ROBOT and GOOGLE BOT?

 

A statistic program will tell you everything.
And how to block IP's you will find with the forumsearch.

 

You can block IPs with a .htaccess file

Something like this:

order allow,deny
allow from all
deny from xxx.xxx.xxx.xxx

Code (markup):

You can add as many "deny from xxx.xxx.xxx.xxx" lines as you want.

All you need to know are the IP addresses you want to block.