Maybe this will help:
http://support.microsoft.com/kb/898060/
"TheFly" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ps.com...
> Hi,
>
> we have several Windows 2003 Server. They are up without any problems
> since at least 6 month.
>
> Since several weeks we have the following issue :
> - Server is unable to respond to computers that are not inside is local
> ip range
>
> Server :
> - Has 2 NIC, but only one is enabled. It has several ip, all on the
> same ip class, with only one gateway.
> - Server do not have the 2K3 firewall enable.
> - On the local network (same ip class), the server is UP, IIS 6 working
> normally, we can connect via Terminal server, everything is OK.
> - The server can access the web
> - The server can ping external computers
> - External computers can ping the server
>
> But :
> - When an external computer perform IIS simple request (for example on
> a basic GIF), IIS respond, but the client never get the response (there
> is MinBytes error inside HTTPERR)
> - When an external computer connect with terminal client, server
> receive the request, but the client never get the response and
> cannot connect.
>
>
> Additionnal infos :
> - No fordidden log at our firewall level
> - No network error logs in windows event log
> - This appears after the SP1 has been installed.
> - We have found no fix at all.
> - A reboot fix directly the problem.
> - After a variable period (2/4 days), the problem occurs again.
> - Our network has not been changed, so we clearly exclude networks
> issues, it really seems to be a pure Windows problem, perhaps a SP1
> issue.
>
> If someone can helps, we are becoming totally mad.
> Thanks a lot. Laurent.
>