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Too many networks connections

Posted on 2001-08-07
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Last Modified: 2007-02-13
We've got a Windows NT-based network spread over 5 cities, with about 40 servers altogether, and a lot of shares (several thousand).  Servers are running NT 4.0 SP5.

Some of the Win95 PCs seem to go into some sort of discovery process just after they log on.
Most of the time, its not a problem, but some appear to hang on to the shares they find, and eventually end up with 256 Network connections.  Then, when someone tries to map a new drive, or printer on their PC, they get the message "Too many networks connections"

I found this "discovery process" by going into a DOS prompt, and typing:
NET USE
The PCs that exhibit this problem have a few "normal" connections:
Status        Local name    Remote name
OK            M:            \\ELRB0055\AutoCAD

and a whole bunch of unnamed connections:
Status        Local name    Remote name
OK                          \\ELRB0079\X_Drive

It looks to me like the "unnamed connections" is a listing of every single share on our network.  It goes through all the shares on one server, then the next server, sometimes hits any user's PCs that have their hard drives shared, and eventually just quits after 256 total connections.

On some machines, it does this immediately after logging on, causes a problem for about a half-hour, and then goes away (No more unnamed connections).  One some other machines, I get a blue screen of death when it hits 256.
I can watch shares get added slowly to the NET USE list, and, if I catch it & remove them fast enough I'm OK.  If I wait more than 5 or ten minutes, I get the blue screen.

We're running Norton Anti-Virus 5, and McAfee Remote Desktop 32 client on these machines, if that matters.  I have, however removed those programs from the StartUp, and had the same problem.

Anybody got any ideas?
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Question by:DavePlumb
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7 Comments
 
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by:CompuNerd19
ID: 6360693
Turn off file and print sharing for all the 95 workstations (good policy to store information on the servers and not the workstations themselves).  Check any scripts you may have that attempt to map drives automatically.  Netbios works on port TCP/UDP 135-139.  Just an idea, hope it helps.
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by:SysExpert
ID: 6361393
A similar problem that was solved.

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Removed all shortcuts through the mapped drive and it stopped happening.

From: vsamtani           Date: 04/11/2001 08:14AM PST
   Just a thought:

  It may also happen if they are using shortcuts that link to the mapped folfer or something within it.    I have a policy file on the domain controllers where the "Disable Link file tracking" policy is ticked     for the default user (it's under Windows NT Shell \ Restrictions), and I have a vague memory that without   this I used to have a rogue mapped drives problem.
-------------------------------------------

I hope this helps !
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by:stevenlewis
ID: 6362446
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Author Comment

by:DavePlumb
ID: 6385879
Well, I've tried both the Shortcut trick (I removed everything from my desktop) and upgrading my winsock.  
Still have the same problem.
Anyone else?
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Expert Comment

by:SysExpert
ID: 6385968
try this !

From: pslh        Date: 03/25/2001 06:22AM PST
               
                 Go to the Control Panel, Folder Options, View, unchecked the box
                 [ ] Automatically search for network folders and printers.
                 OK. Restart computer.

   It will stop the delay due to searching for the network folders and printers whenever you opened Windows explorer.
NT and win9x performance enhancers.
http://www.winguides.com/registry/category.php/30/             
--------------------------
Also -
Intermittent slow network connection with games.
From: aidy                Date: 12/20/2000 09:45AM PST
 Yay! I found what was causing the problem! Would anyone believe it was simply a windows cache setting?!         Geez!  Thank

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Check that NetBeui i not being used, and that there are no viruses !!

I hope this helps !

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Author Comment

by:DavePlumb
ID: 6483605
Turns out it was a virus.

Thanks, all for your help.
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