4.4.2
Predefined
and
Custom
Service
Protocols
The
administrator
can
add
or
delete
firewall
service
protocols
here;
the
services
on
this
list
will
become
available
drop
‐
down
options
to
choose
from
in
firewall
rule
(when
EtherType
is
IPv4).
The
first
27
entries
are
default
services
and
the
administrator
can
add
any
extra
desired
services.
These
27
default
firewall
services
cannot
be
deleted
but
can
be
disabled.
28