MS Proxy authentication issues

I believe this is the right area for this, if not, please accept my apologies.

I just inherited a company that is having MS Proxy 2.0 issues.  From what I have been told the machine used to be a standalone server in a workgroup, now it is in a domain.  It is running IIS 4.0, SP6 and the latest IIS security packs.  It is a multi-homed server and it's connection to the Net is through a cable modem.

The problem is this, everyone internally who tries to access the Internet is asked for a username, password, and domain.  If/when this is supplied it repeats this process 3 times and then gives a blank web page with no error message.

I haven't been able to find anything too helpful on MS' web site.  Anyone have any ideas?

Much appreciated.
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SysExpertConnect With a Mentor Commented:
1) You need to turn on anonymous access.

2) You need to turn off any user authentification.

I would suggest you read the manual on proxy server and trobleshooting and also take a look at

Proxy Server 2 - Install, FAQ

I hope this helps !
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