how to block remote hosts referer

[Terrence Miao <terrence@xxxxxxxxxxxxxx>]

how to block remote hosts referer
---------------------------------


    ## Block remote hosts referer
    SetEnvIfNoCase Referer localhost LOCAL_HOST
    SetEnvIfNoCase Referer igloo\.its\.unimacq\.edu\.au LOCAL_REFERER
    <Files  "*.jpg">
	Order deny,allow
	Deny from all
	Allow from env=LOCAL_HOST env=LOCAL_REFERER
    </Files>
    <Files  "*.png">
	Order deny,allow
	Deny from all
	Allow from env=LOCAL_HOST env=LOCAL_REFERER
    </Files>
    <Files  "*.swf">
	Order deny,allow
	Deny from all
	Allow from env=LOCAL_HOST env=LOCAL_REFERER
    </Files>
    <Files  "*.mpeg">
	Order deny,allow
	Deny from all
	Allow from env=LOCAL_HOST env=LOCAL_REFERER
    </Files>
    <Files  "*.mp3">
	Order deny,allow
	Deny from all
	Allow from env=LOCAL_HOST env=LOCAL_REFERER
    </Files>
    <Files  "*.mov">
	Order deny,allow
	Deny from all
	Allow from env=LOCAL_HOST env=LOCAL_REFERER
    </Files>
    ## doesn't work for asf files
    # <Files  "*.asf">
    #     Order deny,allow
    #     Deny from all
    #     Allow from env=LOCAL_HOST env=LOCAL_REFERER
    # </Files>
    ## doesn't work for wmv files
    # <Files  "*.wmv">
    #     Order deny,allow
    #     Deny from all
    #     Allow from env=LOCAL_HOST env=LOCAL_REFERER
    # </Files>