IIS6默认情况下没有开启GZIP功能，需要我们手动配置，但他又没提供图形化配置功能，所以呀，像我这样的技术人才，都没考虑过使用他，昨天突然看到这个想到，也许对我有用，但从网上找了找，都是一堆手工操作方法，非常麻烦呀，不过以前研究过IIS的配置文件：C:\WINDOWS\system32\inetsrv\MetaBase.xml，所以呀，我知道只要是IIS的功能就可以通过修改这个文件来完成，所以呢，就对这个文件下手吧，根据网上提供的修改的地方，在网上搜索了一圈，找到一个类似ClickOnce 的东西，呵呵，我找的就是这个，所有操作都一键到位，只要执行一段VBS或CMD就配置好了，呵呵。
使用Gzip压缩会增大服务器CPU的使用率但可以通过压缩而减少服务器向客户端发送的数据,若使用了Gzip压缩IIS在向客户端发送数据时会自动检测，如果客户端浏览器支持IE6.0,firefox Gzip,则使用Gzip压缩后再传送数据，如果不支持，则使用常规方式发送。
所以，总结下他的优缺点，优：压缩传输，速度一般提高2倍。缺：CPU占用会有所提高，不过通过我的一点分析，GZIP只是在访问一个页时才会进行压缩，下次如果网页没有变动是不会压缩的，除非是使用压缩动态文件，这得实时的去压缩。
REM Setup IIsCompressionScheme for deflate
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcCompressionDll "%windir%\system32\inetsrv\gzip.dll"
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcCreateFlags 0
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcDoDynamicCompression TRUE
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcDoOnDemandCompression TRUE
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcDoStaticCompression TRUE
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcDynamicCompressionLevel 9
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcFileExtensions "htm" "html" "txt" "js" "xml" "css"
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcOnDemandCompLevel 9
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcPriority 1
cscript adsutil.vbs set W3Svc/Filters/Compression/DEFLATE/HcScriptFileExtensions "asp" "dll" "exe" "aspx" "asmx"
REM Setup IIsCompressionScheme for GZip
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcCompressionDll "%windir%\system32\inetsrv\gzip.dll"
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcCreateFlags 1
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcDoDynamicCompression TRUE
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcDoOnDemandCompression TRUE
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcDoStaticCompression TRUE
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcDynamicCompressionLevel 9
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcFileExtensions "htm" "html" "txt" "js" "xml" "css"
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcOnDemandCompLevel 9
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcPriority 1
cscript adsutil.vbs set W3Svc/Filters/Compression/GZIP/HcScriptFileExtensions "asp" "dll" "exe" "aspx" "asmx"
REM Setup IIsCompressionSchemes parameters
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcCacheControlHeader max-age=86400
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcCompressionBufferSize 102400
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcCompressionDirectory "%windir%\IIS Temporary Compressed Files"
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcDoDiskSpaceLimiting FALSE
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcDoDynamicCompression TRUE
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcDoOnDemandCompression TRUE
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcDoStaticCompression TRUE
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcExpiresHeader "Wed, 01 Jan 1997 12:00:00 GMT"
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcFilesDeletedPerDiskFree 256
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcIoBufferSize 102400
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcMaxDiskSpaceUsage 0
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcMaxQueueLength 1000
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcMinFileSizeForComp 1
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcNoCompressionForHttp10 FALSE
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcNoCompressionForProxies FALSE
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcNoCompressionForRange FALSE
cscript adsutil.vbs set W3SVC/Filters/Compression/Parameters/HcSendCacheHeaders FALSE
iisreset
以上是方法adsutil.vbs不一定人人都能找到，所以提供完整下载地址：
http://xiazai.jb51.net/201101/tools/IIS6-SET-GZIP.rar