How to override "The access code is invalid" message?

[Carl]

For some reason this article isn't showing in the www KB. Here it is
though:

SYMPTOMS
========

You may see the following error inside of a web browser when attempting to
connect through Microsoft Proxy server 1.0.

The proxy server has encountered an error (The access code is invalid).

CAUSE
=====

This error message is returned when you attempt to access the proxy server
from an invalid interface.

For example, if the proxy server is connected to your internal network and
the Internet and the web browser resolves your proxy server's IP address to
the Internet IP address instead of the internal IP address, you will get
this message.

WORKAROUND
==========

Verify that the Local Address Table contains only the IP addresses of your
internal network clients (including the IP address of the internal network
card on the proxy server).

Verify that your web clients are resolving to the address of the Intranet
network card. To test, PING your Proxy's server name or DNS name and make
note of the address that is returned. If the address belongs to the
Internet network card, correct it by checking your WINS server, DNS server
or LMHOSTS files.

--

Thanks,
Carl Cavello
MS Internet Server Support

Jarkko Sakki <Jarkko...@wallac.fi> wrote in article
<01bc5087$eacd9580$d38ea3c0@jsak>...
> Is there a way we could configure MS Proxy 1.0 to send our own .html page
> to user when access to site that is on the denied sites (filter) list is
> accessed? Or at least change the default error message to something
"Access
> to this site is blocked by system" from where the users could actually
> understand what has gone wrong.
>
> - Jarkko
>
>