Networking Connectivity
Network Connectivity
Remote Desktop Connection Drops After Installing Symantec Endpoint Protection*

When using Remote Desktop to a Windows Server* 2008 based system after installing Symantec Endpoint Protection* your connection might drop after a short time with the following error displayed in a Windows* pop-up message:

Because of an error in data encryption, this session will end. Please try connecting to the remote computer again.

According to the Symantec* Support Knowledgebase, this issue is not caused by Symantec Endpoint Protection.

You can work around this issue by disabling Large Send Offload on the affected server.
Disable Large Send Offload (IPv4) and Large Send Offload (IPv6) on an Intel® Ethernet adapter in the advanced properties tab for the adapter in Windows Device Manager*.

Additional information
Symantec Support Knowledgebase Article*
Advanced settings for Intel® 10/100 and Gigabit Adapters
Advanced driver settings for Intel® Ethernet 10 Gigabit Server Adapters
Advanced settings for Intel® PRO/10GbE Server Adapters

Operating System:

Windows Server 2008 *

This applies to:

Intel® 10 Gigabit AF DA Dual Port Server Adapter
Intel® 10 Gigabit AT Server Adapter
Intel® 10 Gigabit CX4 Dual Port Server Adapter
Intel® 10 Gigabit XF LR Server Adapter
Intel® 10 Gigabit XF SR Dual Port Server Adapter
Intel® 10 Gigabit XF SR Server Adapter
Intel® Ethernet Converged Network Adapter X520 Series
Intel® Ethernet Converged Network Adapter X540-T1
Intel® Ethernet Converged Network Adapter X540-T2
Intel® Ethernet Server Adapter I210-T1
Intel® Ethernet Server Adapter I340-F4
Intel® Ethernet Server Adapter I340-T4
Intel® Ethernet Server Adapter I350-F2
Intel® Ethernet Server Adapter I350-F4
Intel® Ethernet Server Adapter I350-T2
Intel® Ethernet Server Adapter I350-T4
Intel® Ethernet Server Adapter X520 Series
Intel® Ethernet Server Adapter X520-DA2
Intel® Ethernet Server Adapter X520-LR1
Intel® Ethernet Server Adapter X520-SR1
Intel® Ethernet Server Adapter X520-SR2
Intel® Ethernet Server Adapter X520-T2
Intel® Gigabit CT Desktop Adapter
Intel® Gigabit EF Dual Port Server Adapter
Intel® Gigabit ET Dual Port Server Adapter
Intel® Gigabit ET Quad Port Server Adapter
Intel® Gigabit ET2 Quad Port Server Adapter
Intel® PRO/100 M Desktop Adapter
Intel® PRO/100 S Desktop Adapter
Intel® PRO/100 S Dual Port Server Adapter
Intel® PRO/100 S Management Adapter
Intel® PRO/100 S Server Adapter
Intel® PRO/1000 GT Desktop Adapter
Intel® PRO/1000 GT Quad Port Server Adapter
Intel® PRO/1000 MF Dual Port Server Adapter
Intel® PRO/1000 MF Server Adapter
Intel® PRO/1000 MF Server Adapter (LX)
Intel® PRO/1000 MT Desktop Adapter
Intel® PRO/1000 MT Dual Port Server Adapter
Intel® PRO/1000 MT Quad Port Server Adapter
Intel® PRO/1000 MT Server Adapter
Intel® PRO/1000 PF Dual Port Server Adapter
Intel® PRO/1000 PF Quad Port Server Adapter
Intel® PRO/1000 PF Server Adapter
Intel® PRO/1000 PT Desktop Adapter
Intel® PRO/1000 PT Dual Port Server Adapter
Intel® PRO/1000 PT Quad Port Low Profile Server Adapter
Intel® PRO/1000 PT Quad Port Server Adapter
Intel® PRO/1000 PT Server Adapter
Intel® PRO/1000 XF Server Adapter
Intel® PRO/1000 XT Low Profile Server Adapter
Intel® PRO/1000 XT Server Adapter
Intel® PRO/10GbE CX4 Server Adapter
Intel® PRO/10GbE LR Server Adapter
Intel® PRO/10GbE SR Server Adapter
NetEffect™ Ethernet Server Cluster Adapters

Solution ID: CS-030647
Last Modified: 15-Oct-2014
Date Created: 14-Jul-2009
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