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odd disconnect issue

I have a server that I have a few people constantly connect to, both with mapped drives and using Radmin to connect to the console.

this server is the main application/reporting server for our order processing system.  

The analyst that connects to it (and there are 3 people that have reported this) state that they will lose their connection to the server, their radmin connection drops, and they are unable to connect again, they lose their mapped drive, they get an error stating that the network path was not found, and the connection is not restored.

It will go on for a few minutes or so, and they are able to connect again.  as far as I can see, I see nothing wrong with the server itself, it still looks up, and I can remote console in via the vsphere client (its a VM - esx 4.1), and can access the drives.

I am not certain of what is going on, if it was only 1 user, the issue would be them, but its 3 different people.  Oddly enough, it never happens in the office, it only happens from home via a VPN connection.  They have no other issues with any other servers, just this one particular server.  

I look in the eventlogs and see a few errors around the time that it is happening, but nothing serious.  There are several 1524 errors, for unloading the registry files for users that have services running under their name.  we have about 24 services on this server running under a few specific user accounts - this is done by default by the vendor.

The only one that I see that is strange is a 4193 MSDTC error:
MS DTC started with the following settings (OFF = 0 and ON = 1):

  Security Configuration:
      Network Administration of Transactions = 0,
      Network Clients = 0,
      Inbound Distributed Transactions using Native MSDTC Protocol = 0,
      Outbound Distributed Transactions using Native MSDTC Protocol = 0,
      Transaction Internet Protocol (TIP) = 0,
      XA Transactions = 0
  Filtering Duplicate events = 1

Not sure of what the situation is unfortunately.  And orf course I dont have much assistance of my p[eople that use it other than them sending me an email with the same screenshots stating that it is disconnected.  

Any ideas of where to look to begin?



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Wayside_Tech
Asked:
Wayside_Tech
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1 Solution
 
Jayachandran PalanisamyTechnical Consultant - LinuxCommented:
Hi,

You can go through this MS articles and try to increase the RDP connection limit.
http://technet.microsoft.com/en-us/library/cc754762.aspx
http://social.technet.microsoft.com/Forums/en-US/windowsserver2008r2rds/thread/7dda31c6-5f99-4ac1-af84-a0bbc0ee6831/

I do believe that this might help you.

Jayachandran Palanisamy
*personal e-mail removed by Mod_MarlEE 1 Nov 2011*
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Wayside_TechAuthor Commented:
Thanks for the response, how would that help anything?  not sure why the rdp connection limit would be responsible for that...
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Jayachandran PalanisamyTechnical Consultant - LinuxCommented:
Please check this too.

http://www.innovationframes.com/phpbb/viewtopic.php?f=28&t=279

- Jayachandran Palanisamy
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Wayside_TechAuthor Commented:
yes, that is for remote desktop, I am referring to radmin, which is a remote control program that gives access directly to the console.

http://www.radmin.com/products/radmin/

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Wayside_TechAuthor Commented:
Since this is a virtual machine, I took a look at the stats and I dont see anything that is out of the ordinary for the times that were reported to disconnect/not allow someone to connect.  Network util is not high, CPU and memory usage for that time is not high, its strange.  

I added a few tags to this question as well.
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Wayside_TechAuthor Commented:
actually I must apologize, this also does affect RDP sessions as well.

I took a look and in the local policy it is set to not restrict users to one session.  
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Wayside_TechAuthor Commented:
As well as the registry entry as you suggested.
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Jayachandran PalanisamyTechnical Consultant - LinuxCommented:
Hi,
Try the followings.

1.After changed the RDP settings on gpedit/registry do reboot of your VM
2.If still it's not resolved then try to restart your hardware node and have a try

Which Hypervisor you are using(Virtuozzo, HyperV or VMWare)?

Regards,
Jayachandran Palanisamy
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Wayside_TechAuthor Commented:
its vmware.  I didnt make any changes, we were set to no limit, so I didnt have to make a change.  we reboot these servers each week end
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Wayside_TechAuthor Commented:
So I have more information now.

it seems that it is the server itself that is causing the disconnects.  When users have a connection to the server:either via remote desktop, radmin, or even an explorer window, they close out, and it takes a few seconds for it to come back.

We run an application on this server as well, and it disconnects the same way as the remote sessions do.   it seems to be only this one server.

I moved it to a different esx host this morning.  not sure of what could be causing this.
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Wayside_TechAuthor Commented:
still happening, vmware support didnt know. I am on with Microsoft support now...
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Wayside_TechAuthor Commented:
not the solution I needed, but it did assist.
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