Strange Problem when a server is present on the network

[TheChillPill]

I have the following configuration;

BT Router (connected to BTOpenworld NoNat13)
4x Windows XP Home Edition Computers (all running a static IP configuration)
1x Windows 2000 Advanced Server with 2 Network cards both with a different
static IP

If the Win2k server is switched off, all computers can access the Internet
without any problem, maintaining the connection permanently. Within 30
minutes of me switching on the server, all of the XP systems fail when
trying to connect to any website, messenger service etc. As soon as I
switch off the server again, everything kicks back in.

The W2K server is running IIS, Mailenable, Coldfusion MX & Power DNS.

I had the same problem with my last server, but all hardware has been
replaced and the only common software that was running on both was W2K Adv
Server & Coldfusion MX.

Has anyone come across this before, or have any idea what could be causing
it?

Many Thanks,

Lee

 

[Michael Holzemer]

My WAG would be that the XP machines are configured to use the server as
primary DNS and some ISP as secondary. When you switch on the server the DNS
is not working properly so when the clients try to resolve they cannot.
Bring up the server and pause the DNS. Do the clients continue to resolve?

 

[TheChillPill]

Is the servers IP is different than the gateway?

Yes, the servers IP's end 209 & 210 whereas the Gateway is 222. (the server
itself is configured to connect through that gateway too)

Are both server NIC cards on different networks?

No, they are on the same network - settings are identical except for the
last 2 digits of the IP address.

 

[Michael Holzemer]

If you disconnect a XP machine and plug in the server does that work (leave
one NIC disabled)? Are all the computers able to communicate with each
other? Use Ping to check. See this article

http://www.experts-exchange.com/Networking/Broadband/Q_20578096.html

--
Regards,

Michael Holzemer
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[TheChillPill]

Thanks again Michael,

Yes, all the computers are able to connect to each other - file transfers,
sharing printers etc. It seems to be only the Internet connection causing a
problem.

I'm going to work my way through all the Win2K components and see if any of
those could be causing a problem.

Thanks again,

Lee

 

[Sa'ad Razouky]

I have the following configuration;

BT Router (connected to BTOpenworld NoNat13)
4x Windows XP Home Edition Computers (all running a static IP configuration)
1x Windows 2000 Advanced Server with 2 Network cards both with a different
static IP

If the Win2k server is switched off, all computers can access the Internet
without any problem, maintaining the connection permanently. Within 30
minutes of me switching on the server, all of the XP systems fail when
trying to connect to any website, messenger service etc. As soon as I
switch off the server again, everything kicks back in.

The W2K server is running IIS, Mailenable, Coldfusion MX & Power DNS.

I had the same problem with my last server, but all hardware has been
replaced and the only common software that was running on both was W2K Adv
Server & Coldfusion MX.

Has anyone come across this before, or have any idea what could be causing
it?

Many Thanks,

Lee

Check the server NIC cards IP configurations, and make sure the Default
Gateway box is empty or has the correct IP address.