How to take advantage of links to invalid subdomains

October 4th, 2006 by Stefan Juhl

As a follow up to my previous post, How to steal your competitors Google traffic, I’ll explain how to take advantage of links to invalid subdomains on your website. The technique is also to avoid loosing to much traffic because of firefox users finding the subdomains in Google and not being able to click through.

This technique has two main goals in regards to the invalid subdomains being indexed by Google.

  1. To avoid users finding the subdomains so you won’t lose traffic.
  2. To pass on the link popularity these subdomains obtains.

The first thing you need to do is setup the webserver to only show the website for your primary subdomain e.g. ‘www’. Then all other subdomains (use a * alias) needs to point to another root directory so you can serve another page on those.

Then you should create a page for the subdomains other than the primary one. Since you don’t want it to be found in Google’s index, you’ll need to make it a graphics only page. That means a page with no text at all. No title tag, no headline, really not any text! The only things you should put on the page is images with links on them.

I’d recommend you to make a header image with your logo/name and a text like “Oops, this page doesn’t exist. Please pick a page below!”. This image should then be linked to your frontpage on the primary subdomain. Then I’d recommend you to pick your top 10 most important subpages and make an image for each of those which has the page name/title on them, and then put links to the corresponding pages on those images. The html for your page would then look something like this:

<html>
<body>
<a xhref="http://www.cyberinet.com/" ><img xsrc="header.jpg" ></a>
<a xhref="http://www.cyberinet.com/page1.htm" ><img xsrc="img1.jpg" ></a>
<a xhref="http://www.cyberinet.com/page2.htm" ><img xsrc="img2.jpg" ></a>
<a xhref="http://www.cyberinet.com/page3.htm" ><img xsrc="img3.jpg" ></a>
</body>
</html>

Unfortunately there is one problem with this technique. Even though there’s no textual content which Google could match search queries against, there’s still the anchor text used in links to the subdomains. So if you’re getting googlebombed massively you might end up in the SERPs anyway. If this should happen I’d recommend you to put a robots.txt with disallow for all agents in the root dir of the subdomains which shouldn’t appear in the search index.

Even though this makes you unable to fullfill goal #2 there’s a good reason for this. The links used for the googlebomb is probably mainly from comment / trackback / guestbook spamming. And the last thing you’d want to happen is having Google ban your website because they think you’re a spammer. Unless of course if you’re generating spam links anyway…

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Posted in Black Hat SEO, White Hat SEO, Link Building / Bait |

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Stefan Juhl