In my access.log I found this lines:

109.230.220.33 - - [02/Apr/2011:00:42:07 +0400] "GET http://movies.yahoo.com// HTTP/1.0" 200 151 "-" "-"
95.132.30.204 - - [03/Apr/2011:02:06:24 +0400] "GET http://www.google.com/ HTTP/1.0" 200 151 "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"
109.230.222.236 - - [04/Apr/2011:16:56:03 +0400] "GET http://XXX.XXX.XXX.XX/?login=sandart232&passwd=testing HTTP/1.0" 200 151 "-" "-"
109.230.222.236 - - [07/Apr/2011:12:50:14 +0400] "HEAD / HTTP/1.0" 200 0 "-" "-"
109.230.222.236 - - [07/Apr/2011:12:50:14 +0400] "HEAD / HTTP/1.0" 200 0 "-" "-"
109.230.222.236 - - [07/Apr/2011:12:50:15 +0400] "HEAD / HTTP/1.0" 200 0 "-" "-"
109.230.222.236 - - [07/Apr/2011:12:50:20 +0400] "HEAD / HTTP/1.0" 200 0 "-" "-"
109.230.222.236 - - [07/Apr/2011:12:50:56 +0400] "GET http://maps.yahoo.com/ HTTP/1.0" 200 151 "-" "-"
109.230.222.236 - - [07/Apr/2011:12:50:56 +0400] "GET http://maps.yahoo.com/ HTTP/1.0" 200 151 "-" "-"
175.138.46.45 - - [08/Apr/2011:08:35:28 +0400] "GET http://answers.yahoo.com/ HTTP/1.0" 200 151 "-" "-"

What about this lines? People uses my web server like a proxy?
The http status code is 200...

Thank you.