This table defines the IP filters applied to
individual interfaces.
The implementation may choose to allow modifications to this
table only under certain SNMP contexts. The
etsysFWFirewallIntfFilterStorageType for a given SNMP context may
be readOnly, meaning the row cannot be modified or deleted. In
another SNMP context, the etsysFWFirewallIntfFilterStorageType
value could allow the row to be modified or deleted.