I found there are two places of
filter under firewall,
[edit firewall filter filter-name] and
[edit firewall family inet filter filter-name].
what's the differences of them?
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I'll replace the variables with some example variables for this just to make it clearer.
The short version is that
set firewall filter EXAMPLE-FILTER is an artifact in Junos, it still works but generally speaking using the syntax that specifies family is more uniform. In some cases different families have different options for match conditions and terminating actions, though there can be overlap. That said, if you use the
set firewall filter option, the functionality of the choices you see won't change.
NOTE: Much of the output of cut out to keep the post clean.
For example, using
inet you won't see certain L2 conditions that would apply to VPLS:
jhead@R1# set firewall family inet filter EXAMPLE-FILTER term EXAMPLE-TERM from ? Possible completions: > address Match IP source or destination address + apply-groups Groups from which to inherit configuration data + apply-groups-except Don't inherit configuration data from these groups > destination-address Match IP destination address + destination-class Match destination class + destination-class-except Do not match destination class + destination-port Match TCP/UDP destination port + destination-port-except Do not match TCP/UDP destination port > destination-prefix-list Match IP destination prefixes in named list + dscp Match Differentiated Services (DiffServ) code point + dscp-except Do not match Differentiated Services (DiffServ) code point + esp-spi Match IPSec ESP SPI value + esp-spi-except Do not match IPSec ESP SPI value first-fragment Match if packet is the first fragment > flexible-match-mask Match flexible mask > flexible-match-range Match flexible range + forwarding-class Match forwarding class + forwarding-class-except Do not match forwarding class <...snip...>
For example, using
vpls you see those conditions, but not necessarily everything that applies to IPv4:
jhead@R1# set firewall family inet filter EXAMPLE-FILTER term EXAMPLE-TERM from ? Possible completions: <...snip...> + learn-vlan-1p-priority Match Learned 802.1p VLAN Priority + learn-vlan-1p-priority-except Do not match Learned 802.1p VLAN Priority + learn-vlan-dei Match Learnt VLAN ID DEI bit + learn-vlan-dei-except Do not match Learnt VLAN ID DEI bit + learn-vlan-id Match Learnt VLAN ID + learn-vlan-id-except Do not match Learnt VLAN ID <...snip...>