anonymous access problem

[jeffchen2000]

I have winXP pro with sp2, and I just install IIS 5.1.
By default IIS setting, when I access http://127.0.0.1, a authentication window pop-up to ask user ID and password. when I checked "directory security" tab, the "anonymous access" box was checked. I also tried to check or uncheck the other boxes on "authentication method" panel, none of them worked.
I also tried the solutions published on "http://support.microsoft.com/default.aspx?scid=kb;en-us;896861"
that solves "loopback check security" with XP PRO + sp2, still not work.
I also stopped antivirus programs "realsecure" and "symantec", still not work.
however, if I access http://localhost, it worked perfactly.

why?

[jeffchen2000]

I have winXP pro with sp2, and I just install IIS 5.1.
By default IIS setting, when I access http://127.0.0.1, a authentication window pop-up to ask user ID and password. when I checked "directory security" tab, the "anonymous access" box was checked. I also tried to check or uncheck the other boxes on "authentication method" panel, none of them worked.
I also tried the solutions published on "http://support.microsoft.com/default.aspx?scid=kb;en-us;896861"
that solves "loopback check security" with XP PRO + sp2, still not work.
I also stopped antivirus programs "realsecure" and "symantec", still not work.
however, if I access http://localhost, it worked perfactly.

why?

the default page is localstart.asp where user id and password asking request are encoded, so just make a new "index.htm" with any content in it will be OK!