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I've found the following lines in my Apache 2.2 logs (using the standard "combined" log format): - - [10/Feb/2013:20:47:38 +0000] "GET HTTP/1.1" 301 - "-" "webcollage/1.135a" - - [10/Feb/2013:11:09:35 +0000] "HEAD HTTP/1.1" 302 - "-" "Mozilla/5.0 ( Windows; U; Windows NT4.0; FireFox )"

I've never heard of these sites. We certainly don't link or redirect to them. These don't seem like remote clients probing for a proxy - from what I gathered proxy requests end up with a 200 or a 404

What are these requests and why is my server redirecting to them?

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up vote 1 down vote accepted

They could be attempts to see if your server works as a proxy. The number after the request is just the status code returned by your server. 200 being OK and 404 being page not found. A 30X response indicates that your website is configured to redirect all requests for non-existent URIs (which these will be) to another page/website.

If you've only get a couple, I wouldn't bother worrying about them.

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let me check that... which apache directive is responsible for handling requests for non-existent URIs? – Gaia Feb 11 '13 at 12:33
Could be a Redirect or RewriteRule. Quite possibly in a .htaccess file. Lots of web apps are configured by default to redirect all URIs that don't map to a real path/file. – USD Matt Feb 11 '13 at 12:38

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