Watchdog security scan fails in Plesk: Non-existent pathname: /usr/bin/lwp-request

Symptoms

Watchdog security scan Plesk > Extensions > My Extensions > Watchdog > Open > Security > Start fails with error:

CONFIG_TEXT: Invalid SCRIPTWHITELIST configuration option: Non-existent pathname: /usr/bin/lwp-request

Cause

Binary file /usr/bin/lwp-request doesn't exist on the server. This file is part of "perl-libwww-perl" package that is not available in system repositories.

Resolution

1. Connect to the server via SSH as a root user.

2.  Create backup of rkhunter configuration file:
   

   # cp /usr/local/psa/etc/modules/watchdog/rkhunter.conf{,_orig}

3. Comment SCRIPTWHITELIST string using below command:

   # sed -i 's@SCRIPTWHITELIST=/usr/bin/lwp-request@#SCRIPTWHITELIST=/usr/bin/lwp-request@g' /usr/local/psa/etc/modules/watchdog/rkhunter.conf