Network performance slows on Windows XP with Symantec Endpoint Protection 12.1 Release Update 2 Maintenance Pack 1 installed

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Article ID: 157955

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Updated On:

Products

Endpoint Protection

Issue/Introduction

Computers experience network performance problems when the Network Threat Protection (NTP) firewall component of the Symantec Endpoint Protection (SEP) 12.1 Release Update 2 Maintenance Patch 1 (RU2 MP1) client is installed and enabled. Symptoms include:

  • Copying files from a network location over Windows File Sharing takes significantly more time.
  • Programs that are started from a network share take significantly longer to load.
  • Ping responses take longer to return.

 

Cause

This problem is caused by a performance issue introduced with the SEP 12.1 RU2 MP1 NTP firewall driver, teefer2.sys.

Resolution

Symantec is aware of this problem and will update this document when a solution becomes available.

 

To work around this problem, use one of the following:

  • Disable the Network Threat Protection firewall on affected computers.
  • Withdraw the Firewall policy in the Symantec Endpoint Protection Manager (SEPM) for groups containing affected computers.
  • Migrate affected computers to Windows Vista or higher
  • Revert affected computers to the a previous version of the SEP client