NethServer 6

NethServer firewall disables ping responses from the internet by
default, but this behaviour confuses the sysadmin when trying to
diagnose network problems.
I know that a lot of people prefer to have ping responses disabled,
but it's only security through obscurity and it adds nothing to real
security.

I propose to change the default to enabled ping responses, with a db
prop to disable pings.

Relevant template fragment:
/etc/e-smith/templates/etc/shorewall/rules/20ping