Windows 2003 SP1 - Critical Network Issue - Help required

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 network 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 network perform IIS 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.

Have a look at this article
http://support.microsoft.com/kb/898060

"TheFly" wrote:

> 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 network 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 network perform IIS 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.
>
>