Stopping Drupal 7 spammers registering at mysite.com I have a new Drupal 7 site at mysite.com (address changed) - a CentOS 5.5 Linux machine in my full control.

By reading registration mails (they run through my Gmail account) I've noticed, that Drupal spammers seem to refer to my site via the address forum.mysite.com. Since any requests to a subdomain.mysite.com are redirected by my hoster to mysite.com, this works for them.

I wonder, if anyone has noticed same pattern (seems to be some common spammer tool behaviour) and what have you done? I'm thinking of using mod_rewrite to block access to forum.mysite.com, but maybe there is a better way? (Because I'm not sure if that spammer tool will go away if I close access to forum.mysite.com).

I've also thought of maybe changing my httpd.conf somehow:

NameVirtualHost 11.22.33.44:80

&lt;VirtualHost 11.22.33.44:80&gt;
    DocumentRoot /var/www/html/mysite.com

    ServerName mysite.com
    ServerAlias mysite.com *.mysite.com


I'm not asking about Mollom or Captcha modules, because they seem to be not-up-to-date for Drupal 7 yet. And the spam users aren't a too big problem for my site anyway, because it has a card game embedded at the front page and I have a cron job deleting users not playing that game.
There is Honeypot as well 


  Honeypot uses both the honeypot and timestamp methods of deterring
  spam bots from completing forms on your Drupal site


Usually, forms take at least a few seconds to fill out when a human is entering data into them—especially surveys, user registration forms, etc. Spam bots try to fill out as many forms as they can in as little time as possible, so they will often fill out a form within a couple seconds at most. The Honeypot module requires at least 5 seconds to pass (by default - you can adjust this too!) before a form can be submitted.

Alternative modules

There are many spam-protection modules on drupal.org, some of which have more or less robust methods of dealing with form spam. Some of the most used and recommended include:

Mollom - Offers spam protection through their premium service.
CAPTCHA - A simple image-based CAPTCHA builder.
reCAPTCHA - Implements reCAPTCHA for image-based CAPTCHAs.
Hidden CAPTCHA - Similar to this module in it's effectiveness.