Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
285
SNMP
Configuration
Check
the
"Enable"
box
to
activate
the
SNMP
function
for
the
gateway.
Drive
the
function
to
work
by
specifying
the
access
interfaces
of
SNMP
protocol,
the
supported
protocol
versions,
the
read/write
communities,
the
trap
event
receivers
and
the
allowed
IP
address
from
outside
to
access
the
gateway
by
using
SNMP
protocol.
User
Privacy
Definition
However,
if
SNMPv3
is
not
listed
in
the
supporting
of
the
"Configuration"
window,
the
"User
Privacy
Definition"
window
will
be
not
used
for
SNMP
agent
in
the
gateway.
The
"User
Privacy
Definition"
window
provides
5
records
of
user
privacy
definition
for
user
authentication
and
data
hashing
and
encryption.
In
SNMPv3,
SNMP
protocol
supports
user
privacy
feature
additionally.
By
referring
to
above
setting
diagram,
there
are
3
privacy
modes:
authPriv,
authNoPriv
and
noAuthNoPriv.
At
authPriv
mode,
User
Name
and
Password
are
used
for
user
authentication
during
logging
in
the
SNMP
server.
And,
MD5
or
SHA
‐
1
algorithm
is
chosen
for
data
hashing
and
DES
algorithm
is
for
data
encryption.
Additional
Privacy
Key
is
also
used
in
data
encryption.
However,
at
authNoPriv
mode,
User
Name
and
Password
are
for
user
authentication
to
login
SNMP
server,
MD5
or
SHA
‐
1
algorithm
is
chosen
for
data
hashing
and
there
is
no
need
of
Encryption
and
Privacy
Key.
At
last,
at
noAuthNoPriv
mode,
there
is
only
User
Name
to
be
required
to
login
the
SNMP
server.
No
matter
which
privacy
mode
