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library / Web Hosting FAQ / Virtual Hosting

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  15. library page How do I make my own Error Documents to replace the default ones like 404 Not Found?
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  17. library page How do I protect a directory with .htaccess?
  18. library page How do I protect my website from comment spam?
  19. library page How long does a domain name registration last? Can it be renewed?
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  23. library page What PHP modules are available and how do I load them?
  24. library page Where can I see my website if my domain registration does not yet list the right DNS servers, or if I do not have my own domain name?
  25. library page Where is web-mail for my web site located?
  26. library page Which Apache modules are installed?

How do I protect my website from comment spam?

Website forms are often exploited by spammers. People with weblogs, in particular, endure this problem more than necessary.

SPAM bots attempting to exploit forms are poorly designed, making them easy to outsmart. If the SPAM bots do not fake a referrer, you can stop the bot with this code in an .htaccess file:

RewriteCond %{HTTP_REFERER} ^$
RewriteRule ^/POSTprocessing.cgi - [F]

The referrer should always be your site, so you are not stopping any legitimite traffic with this rule. Keeping that in mind, you can block all referrals that aren't from you, instead of blocking blank referrers:

RewriteCond %{HTTP_REFERER} [NC]
RewriteRule ^/POSTprocessing.cgi - [F]

where POSTprocessing.cgi is the script that processes your form's POST data.

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