I've found the following lines in my Apache 2.2 logs (using the standard "combined" log format):
92.240.68.152 - - [10/Feb/2013:20:47:38 +0000] "GET http://8stepschools.com/images/8stances_tiger.jpg HTTP/1.1" 301 - "-" "webcollage/1.135a"
94.75.247.144 - - [10/Feb/2013:11:09:35 +0000] "HEAD http://www.lenta.ru/info/ 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?