Internet Access

cheechm · 25 Apr 2011 at 12:31

For some reason computers connected to my domain seem to access the internet through the DC. How do I stop that? Because obviously if the DC goes down (there is no redunancy) then the other computers cannot connect to the internet.

I've set the Gateway and DNS to the router, rather than the server, but still if the server goes down, the internet on the domain computers is lost. How can I stop this?

Cheers

PistolPete · 25 Apr 2011 at 12:37

I doubt that the internet is "through the DC" seeing as you've set the DFGW and DNS servers to the router.

You need to disconnect the DC from the network and run some basic troubleshooting to determine what's not working and work from there.

With the DC disconnected, try and ping the default gateway.
Try pinging an internet address by IP (try Google's DNS server of 8.8.8.8) and see if it replies.
Do an NSLOOKUP and see what server is attempt to resolve.
Try pinging an FQDN (such as www.google.co.uk) and see if it resolves correctly.

From these you should be able to tell why it stops working.

Skidilliplop · 26 Apr 2011 at 09:17

Is your DC also your DHCP server by any chance?

matthab · 26 Apr 2011 at 13:31

Skidilliplop said:
Is your DC also your DHCP server by any chance?

I bet it is. I bet its the DNS server also

edscdk · 26 Apr 2011 at 13:37

your workstaions are using the DC for DNS,

if you have made the change you said and pointed them at the router, they would have issues loggin in... since the router will not know how to resolve the domain name...

PistolPete I think has suggested the correct trouble shooting route...,

but if you do manage to point them at the router I suspect they will stop logging in correctly or at least give a long pause...

Gaz1988 · 26 Apr 2011 at 18:52

set up a second domain controller with DNS installed, point clients towards original DNS and new DNS. job done.

cheechm · 26 Apr 2011 at 20:21

Ok thanks guys. Managed to sort this now. Wrong DNS set up on the server and also on the domain computers. All set up properly now.

NB. this is just a test environment for myself trying to get to grips with server 2008 etc...

Skidilliplop · 27 Apr 2011 at 09:38

cheechm said:
Ok thanks guys. Managed to sort this now. Wrong DNS set up on the server and also on the domain computers. All set up properly now.

NB. this is just a test environment for myself trying to get to grips with server 2008 etc...

Well then at least now you've learned something about DNS setups!