We have server 2003 and ISA 2004 with IIS 6 on same machnie. Everything worked well till yesterday, when we try to make some new rule in ISA..but this is a long story...

Unfortunatelly something happend with our intranet site. Our site is on the port 80, but if we try to open on this client machines then we got and error page (which error page is our provider):

403-forbidden; Remote host not listening, the remote host is not prepared to acceppt the connection request.

On the server i can open the site with port 80. If i change the port number in the iis and try to open the site with the port, then works well.

I try to shut down IIS and start apache with a simple page. On the server works well but in clients the problem is the same, so i think this is not an IIS related problem.

In the ISA we have a web pub rule, with port 80, no auth.

Im pulling out my hair, please help.

after uninstall and reinstall ISA, de sites work well, till i configure the upstream proxy in the conf/network/web chaining menu and then everything went same...

So something wrong with the web-proxy / upstream function... (all my http request forward to my upstream proxy). That was the set long time ago...but a few day ago somehing went wrong...

I think maybee our ISP spoiled something..tomorrow i try to figure out...

But one more thing: I make a new rule before the default rule in the conf/network/web chaining menu.

1. Every request go to the server not redirected..
2. Redirect to upstream server....

So if the request goes to our server (our site) then handled locally, and if not then go to upstream proxy and voilllaaa....i tougth... But unfortunatelly: our website work well, but internet work extreamly slowly..:( Maybee with single adapter i can made this? I have to handle all request locally or i have to send all to upstream? I cant filter it?