User are being disconnected from our Remote Desktop server with the error..
"Because of an error in data encryption, this session will end. Please try connecting to the remote computer again"
A little about the setup..
Dell PowerEdge 1850
Windows 2008 RS Standard Server - 64-bit with 8GB Ram
Intel PRO/1000 MT Network Adaptor
Sonicwall NAS 250 firewall/router
Netgear FSM7326P Managed POE switch
Netgear FSM7352PS Managed POE switch
Client machines are various Dell Laptops running Windows 7
Clients are connecting to Remote Desktop Server to run a RemoteApp
Running Sonicwall VPN Client and Microsoft Security Essentials
Clients connect to Remote Desktop Server over LAN and WAN
What I have done so far..
Installed Microsoft Hotfix
Checked that latest NIC drivers were installed
Changed Large Send Offload (IPV4) to disabled
Removed Sonicwall VPN Client computers
This error is also happening, although not as often, to users connecting to our other Terminal Server running Windows Server 2003.
All this seemed to happen when we replaced our Cisco ASA 5500 with the Sonicwall NSA 250. At this time we also installed the Sonicwall VPN client. I mention this because I have read articles stating that others have experienced this issue after installing Sonicwall VPN client. Coincidence?
The majority of the fixes have been changing the Large Send Offload (IPv4) option to Disabled on the servers NIC. Did this but users are still getting disconnected.
At my wits ends with this problem, not to mention the fact that I have to barricade myself in my office to keep from getting lynched by a mob of frustrated users each day.
Any advice, thoughts, suggestions? Please let me know if there is any other information I can add to this question to assist with a resolution.