If you running older version of CSF firewall in your server, you might need to update to latest version to patch up for any security vulnerabilities.

Here is how you need to enable the auto update.

> nano /etc/csf/csf.conf

Then change the AUTO_UPDATES to ‘1′ and once this is done, the CSF will check each day for any updates.

# Enabling auto updates creates a cron job called /etc/cron.d/csf_update which
# runs once per day to see if there is an update to csf+lfd and upgrades if
# available and restarts csf and lfd. Updates do not overwrite configuration
# files or email templates. An email will be sent to the root account if an
# update is performed
AUTO_UPDATES = "1"

And dont forget to restart your firewall.

> csf -r (OR) service csf restart

Hope this small tip is useful.

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