在httpd的error-log里发现大量的Rejecting client错误

随便摘录一点:
[Wed Feb 28 12:48:14 2007] [error] [client 221.4.189.4] Rejecting client at 221.4.189.4, referer: http://jjj9.com/Down/552.html
[Wed Feb 28 12:48:15 2007] [error] [client 221.4.189.4] Rejecting client at 221.4.189.4, referer: http://www.jjj9.com/Down/552.html
[Wed Feb 28 12:48:15 2007] [error] [client 222.175.29.83] Rejecting client at 222.175.29.83, referer: http://www.36yl.com/SeeMovie/Movie_3400.html
[Wed Feb 28 12:48:15 2007] [error] [client 222.175.29.83] Rejecting client at 222.175.29.83, referer: http://www.01se.com/SeeMovie/Movie_3400.html
[Wed Feb 28 12:48:15 2007] [error] [client 218.19.114.23] Rejecting client at 218.19.114.23, referer: http://www.scxxt.com.cn//tmp/movie
[Wed Feb 28 12:48:15 2007] [error] [client 221.206.130.80] Rejecting client at 221.206.130.80, referer: http://www.191v.com/SeeMovie/Movie_3400.html
[Wed Feb 28 12:48:15 2007] [error] [client 222.175.29.83] Rejecting client at 222.175.29.83, referer: http://www.191v.com/SeeMovie/Movie_3400.html
[Wed Feb 28 12:48:15 2007] [error] [client 222.137.147.31] Rejecting client at 222.137.147.31, referer: http://www.31dy.com/SeeMovie/Movie_3400.html
[Wed Feb 28 12:48:15 2007] [error] [client 218.19.114.23] Rejecting client at 218.19.114.23, referer: http://www.01se.com/SeeMovie/Movie_3400.html
[Wed Feb 28 12:48:15 2007] [error] [client 221.224.198.151] Rejecting client at 221.224.198.151, referer: http://www.yi0.net/Down/8709.html

基本都是同样的错误提示,这到底是什么原因造成的呢?又该如何解决呢?谢谢.

这么多天居然都没有人知道吗?
也找不到相关的资料,现在的ERROR_LOG基本都是这个错误,恼火啊