Squid and User Agent of MSIE

For secuirty issue, I need to limit the kind of browser.
Only IE can access Internet with squid proxy.

I use Mtracer to write the fallowing Regular Expression.
Mtracer is a Regular Expression Compose adn Test Tool.

^Mozilla/4.0.\(compatible;.MSIE.(5\.05\.015\.56\.0);.Windows.(98NT.5\.0NT.5\.1)(\);.DigExt\);.SV1\);.\.NET.CLR.1\.0\.3705\);.\.NET.CLR.1\.1\.4322\);.Q312461\);.SV1;.\.NET.CLR.1\.1\.4322\))


Mozilla/4.0 (compatible; MSIE 5.0; Windows 98)
Mozilla/4.0 (compatible; MSIE 5.0; Windows 98; DigExt)
Mozilla/4.0 (compatible; MSIE 5.01; Windows 98)
Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)
Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)
Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; Q312461)
Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; .NET CLR 1.1.4322)

Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)
Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.0.3705)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322)

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)


User Agent Tools
http://www.104testing.com.tw/proxyTest.jsp

http://under-linux.org/forums/configuracao/87780-problemas-squidguard.html