Re: difference between firewall filter and firewall family inet filter?

Both are one and the same :

v4 is the default filter family that is supported 

set firewall ?
Possible completions:
+ apply-groups Groups from which to inherit configuration data
+ apply-groups-except Don't inherit configuration data from these groups
> atm-policer Atm policer
> family Protocol family
> filter Define an IPv4 firewall filter

The family family-name statement is required only to specify a protocol family other than IPv4. To configure an IPv4 firewall filter, you can configure the filter at the [edit firewall] hierarchy level without including the family inet statement, because the [edit firewall] and [edit firewall family inet] hierarchy levels are equivalent.

You can use below link for reference:

http://www.juniper.net/documentation/en_US/junos16.1/topics/concept/firewall-filter-stateless-guidelines-for-configuring.html

Please mark this as accepted solution, if you think it solves your question