This site is for sale,
introduced an HTML attribute (http://www.google.com/googleblog/2005/01/preventing-comment-spam.html)
to prevent ranking credits. Search engines and weblog software already follow this convention.:
<a href="http://www.wiki.org/" rel="nofollow">Link</a>
Instead of displaying a direct hyperlink submitted by a visitor, a web application could display a link to a script on its own website that redirects to the correct
. This will not prevent all spam since spammers do not always check for link redirection but has proven very effective. Redirecting links prevent Google from factoring the link in its
algorithm for that site making the spam ineffective. An added benefit is that your redirection script can count how many people visit external URLs, but one drawback is the increased load on your website.
Idea: However, the script could also be client-side
. For example,
This redirect can also be done via the
, thus saving the load of a script.
Require the user to solve a
, preventing bots from submitting entries.
Retrieved from http://en.wikipedia.org/wiki/Link_spam
Reprinted from Wikipedia, The Free-Content Encyclopedia under the GNU Free Documentation License.
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