We have set up Active Directory on a new school's
server, which is running Windows Server 2003. The primary purpose of
this is to allow a group policy to be applied to 20 laptops.
The server is also be providing server-side storage for the accounts
The server is connected to a network switch, which in turn is
connected to a wireless access point. The server is also used by Censornet proxy server
which, when authenticated by Active Directory, is used by clients
to access the internet. In the IT facilities there are 20
laptops which connect to the wireless access point, each of which is
configured to access Active Directory on the server.
The problem is that when the laptops log into the server, it works for
a short time then the laptops become unresponsive.
At first we thought the wireless AP was being overloaded, so
we changed it but the problem remained. When this issue arises, the
server machine freezes on "Loading your settings..." when you attempt
to log in to the server physically. To regain control, the server must
be hard rebooted (reset button on front of case).
The network connection itself seems fine as two network switches and
two wireless APs have been used with no resolution to the problem. The
event log shows nothing suspicious other than a few unusual network
disconnections and automatic reconnects.
This is a reasonably urgent issue and a speedy response would be
highly appreciated. Thank you in advance.
First off I would check for the conficker/downadup virus. Your symtoms are an exact copy of what happened here 2 weeks ago. If you are virus free next step would be to confirm DNS is functioning correctly. Withouts a correct DNS setup your servers will be slow to logon and the clients will not receive GP.
I can confirm that we have no reported virus situation. This is a new server only 5 days old. I spent the weekend setting it up and configuring the users and policies.
It is a weird situation because the problem it becoming unresponsive seems to only happen once around 6 to 8 clients authenticate. I've tried logging each laptop in one at a time and after about 6 or 7 it seems to just stop there.
DNS Seems to be working fine. I can find computer names etc and map to drives. ALthough having said that my knowledge of AD is very limited so could I have confirmation of some settings to check on the DNS side.
I had a quick look and clients seems to update their A records ok.
Just to confirm you aint got this conficker business download this from symantec and run it on the server and a couple of clients with the switch /nofilescan. W32.Downadup Removal Tool | Symantec
Honestly those symptoms are exactly what we suffered a while ago. Turned out one laptop with conficker caused the whole network to go down.
The switches are new - replaced last term - Feb I think. There Netgear 24 1gbps. Can't remember the model. I did remove them from the equation and connected the server, 1 desktop and the WAP point to a d-link 8 port switch, yet had the same issue.