File copies over SMB2 fail with Network Threat Protection installed/enabled

Products

• Endpoint Protection

Issue/Introduction

Why do large file transfers over SMB2 fail when the Symantec Endpoint Protection (SEP) Network Threat Protection (NTP) component is installed/enabled?

 

No errors are displayed on screen, but the system may appear to "hang" during file transfers, and large file transfers will eventually fail.

 

Cause

This issue is caused by a conflict between the NTP component of the SEP 11 Release Update 6 (RU6) or newer client, and the SMB2 protocol. The SMB2 protocol was added as the preferred file transfer method for Windows File Sharing with the release of Windows Vista.

 

Resolution

This problem is fixed in Symantec Endpoint Protection 11.0.6300.803 (RU6-MP3). For information on how to obtain the latest build of Symantec Endpoint Protection, read Obtaining an upgrade or update for Symantec Endpoint Protection - http://www.symantec.com/docs/TECH103088.