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How does a 302 redirect affect me? What is 302 Hijacking?
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Question:I have heard about 302 Hijacking that possibly removes my site from google's index. How does a 302 redirect affect me?
Answer:Let's say a hostile site www.hostile.com sets up a 302 redirect to your site www.mysite.com, then googlebot (the spider) see the temporary redirect from hostile.com to mysite.com
Such a temporary redirect can be set up as a header redirect (clean solution with a 302 status) or supposedly also using meta tags.
When the spider sees the redirect, it concludes that www.hostile.com is a new version of your www.mysite.com - because the temporary redirect tells google that www.mysite.com is there only temporarily.
Logically Google will then remove www.mysite.com from its index. So now when someone uses a search term that would have normally brought up your site www.mysite.com will now bring up their www.hostile.com
Google knows of the problem but as of today (5/8/2005) the problem is not fixed. Google hides the wrong URLs artificially when you search using this special syntax ('site:www.mysite.com'). The hostile URLs are still in the database and will still come up on normal searches.