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How to manually roll back the Anti-Virus Scanning Engine in VirusScan Enterprise for Linux
Technical Articles ID:   KB54769
Last Modified:  4/17/2019
Rated:

Environment

McAfee Anti-Virus Scanning Engine 6.x.xx
McAfee VirusScan Enterprise for Linux (VSEL) 2.0.x, 1.9.x

Solution

CAUTION: These instructions apply only when all following conditions are true:
  • A new Engine is available.
  • You have installed the new Engine and want to roll back manually.
  • The old Engine is still supported.
NOTE: This article is written for a rollback scenario, but the same steps can be used to manually update the engine.
 
To manually roll back, when the Engine version is still supported:
  1. Download a copy of the previous force downgrade package Linux Engine Package for Use with ePO from the Engine tab at:

    http://www.mcafee.com/apps/downloads/security-updates/security-updates.aspx?region=us#tab-engines

    If no such Engine is listed, the previous version is no longer supported, and rolling back is no longer an option.
     
  2. On the server running VSEL, type the following command and press Enter:

    su -
    <root password>

    This action switches you to the root account.
     
  3. Type each of the following commands and press Enter:

    #/etc/init.d/nails stop
    #/etc/init.d/cma stop

    This action stops the VSEL and Agent services.
     
  4. Type each of the following commands and press Enter:

    #cd /opt/NAI/LinuxShield/engine/lib
    #rm –rf *

    This action removes current Engine files from /opt/NAI/LinuxShield/engine/lib.
     
  5. For VSEL 1.9, extract the files from avengine.zip from the downloaded .zip file, to a temporary directory. For VSEL 2.0 or later, extract the files from avengine64.zip from the downloaded .zip file, to a temporary directory.
  6. Copy the new Engine files to the /opt/NAI/LinuxShield/engine/lib directory following the example provided. In the following example, the files are copied from the /tmp directory:
     
    #cp /tmp/config.dat /opt/NAI/LinuxShield/engine/lib
    #cp /tmp/signlic.txt /opt/NAI/LinuxShield/engine/lib
    #cp /tmp/liblnxfv.so.4 /opt/NAI/LinuxShield/engine/lib
     
  7. Type each of the following commands and press Enter:

    #cd /opt/NAI/LinuxShield/engine/lib
    #chown root.nailsgroup ./*
    #chmod 740 ./*
    #ln -s ./liblnxfv.so.4 ./liblnxfv.so

    This changes permissions of the new Engine files.
     
  8. Type each of the following commands and press Enter:

    #/etc/init.d/nails start
    #/etc/init.d/cma start

    This action restarts LinuxShield services.

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