Check Information Restriction

This scenario shows how to configure a view to restrict information for incoming requests in SNMPv3. In addition, the SNMP ‘walk’ and ‘table’ commands are checked.

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Test SNMPv3

Description

A restricted view is configured for a user in DUT0 and the ‘walk’ and ‘table’ commands are used to check incoming requests in SNMPv3.

Scenario

Step 1: Set the following configuration in DUT0:

set interfaces ethernet eth0 address 10.0.0.1/24
set service snmp user USER2TEST

Step 2: Set the following configuration in DUT1:

set interfaces ethernet eth0 address 10.0.0.2/24

Note

Initially, local and DUT1 requests are allowed, since there are no restrictions by default.

Step 3: Run command service snmp walk local-agent v3 USER2TEST oid ifTable at DUT0 and check if output matches the following regular expressions:

::ifDescr\.1 = STRING: "?lo"?
Show output
IF-MIB::ifIndex.1 = INTEGER: 1
IF-MIB::ifIndex.2 = INTEGER: 2
IF-MIB::ifIndex.3 = INTEGER: 3
IF-MIB::ifDescr.1 = STRING: lo
IF-MIB::ifDescr.2 = STRING: Red Hat, Inc Device 0001
IF-MIB::ifDescr.3 = STRING: Red Hat, Inc Device 0001
IF-MIB::ifType.1 = INTEGER: softwareLoopback(24)
IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifMtu.1 = INTEGER: 65536
IF-MIB::ifMtu.2 = INTEGER: 1500
IF-MIB::ifMtu.3 = INTEGER: 1500
IF-MIB::ifSpeed.1 = Gauge32: 10000000
IF-MIB::ifSpeed.2 = Gauge32: 0
IF-MIB::ifSpeed.3 = Gauge32: 0
IF-MIB::ifPhysAddress.1 = STRING:
IF-MIB::ifPhysAddress.2 = STRING: de:ad:be:ef:6c:10
IF-MIB::ifPhysAddress.3 = STRING: de:ad:be:ef:6c:11
IF-MIB::ifAdminStatus.1 = INTEGER: up(1)
IF-MIB::ifAdminStatus.2 = INTEGER: up(1)
IF-MIB::ifAdminStatus.3 = INTEGER: down(2)
IF-MIB::ifOperStatus.1 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: up(1)
IF-MIB::ifOperStatus.3 = INTEGER: down(2)
IF-MIB::ifLastChange.1 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.2 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.3 = Timeticks: (0) 0:00:00.00
IF-MIB::ifInOctets.1 = Counter32: 123664
IF-MIB::ifInOctets.2 = Counter32: 908480093
IF-MIB::ifInOctets.3 = Counter32: 3474496004
IF-MIB::ifInUcastPkts.1 = Counter32: 0
IF-MIB::ifInUcastPkts.2 = Counter32: 0
IF-MIB::ifInUcastPkts.3 = Counter32: 0
IF-MIB::ifInNUcastPkts.1 = Counter32: 0
IF-MIB::ifInNUcastPkts.2 = Counter32: 0
IF-MIB::ifInNUcastPkts.3 = Counter32: 0
IF-MIB::ifInDiscards.1 = Counter32: 0
IF-MIB::ifInDiscards.2 = Counter32: 0
IF-MIB::ifInDiscards.3 = Counter32: 13
IF-MIB::ifInErrors.1 = Counter32: 0
IF-MIB::ifInErrors.2 = Counter32: 0
IF-MIB::ifInErrors.3 = Counter32: 0
IF-MIB::ifInUnknownProtos.1 = Counter32: 0
IF-MIB::ifInUnknownProtos.2 = Counter32: 0
IF-MIB::ifInUnknownProtos.3 = Counter32: 0
IF-MIB::ifOutOctets.1 = Counter32: 123664
IF-MIB::ifOutOctets.2 = Counter32: 2855019735
IF-MIB::ifOutOctets.3 = Counter32: 3474494922
IF-MIB::ifOutUcastPkts.1 = Counter32: 1128
IF-MIB::ifOutUcastPkts.2 = Counter32: 1903653
IF-MIB::ifOutUcastPkts.3 = Counter32: 2459310
IF-MIB::ifOutNUcastPkts.1 = Counter32: 0
IF-MIB::ifOutNUcastPkts.2 = Counter32: 0
IF-MIB::ifOutNUcastPkts.3 = Counter32: 0
IF-MIB::ifOutDiscards.1 = Counter32: 0
IF-MIB::ifOutDiscards.2 = Counter32: 0
IF-MIB::ifOutDiscards.3 = Counter32: 0
IF-MIB::ifOutErrors.1 = Counter32: 0
IF-MIB::ifOutErrors.2 = Counter32: 0
IF-MIB::ifOutErrors.3 = Counter32: 0
IF-MIB::ifOutQLen.1 = Gauge32: 0
IF-MIB::ifOutQLen.2 = Gauge32: 0
IF-MIB::ifOutQLen.3 = Gauge32: 0
IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.3 = OID: SNMPv2-SMI::zeroDotZero

Step 4: Run command service snmp walk remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output matches the following regular expressions:

::ifDescr\.1 = STRING: "?lo"?
Show output
IF-MIB::ifIndex.1 = INTEGER: 1
IF-MIB::ifIndex.2 = INTEGER: 2
IF-MIB::ifIndex.3 = INTEGER: 3
IF-MIB::ifDescr.1 = STRING: lo
IF-MIB::ifDescr.2 = STRING: Red Hat, Inc Device 0001
IF-MIB::ifDescr.3 = STRING: Red Hat, Inc Device 0001
IF-MIB::ifType.1 = INTEGER: softwareLoopback(24)
IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifMtu.1 = INTEGER: 65536
IF-MIB::ifMtu.2 = INTEGER: 1500
IF-MIB::ifMtu.3 = INTEGER: 1500
IF-MIB::ifSpeed.1 = Gauge32: 10000000
IF-MIB::ifSpeed.2 = Gauge32: 0
IF-MIB::ifSpeed.3 = Gauge32: 0
IF-MIB::ifPhysAddress.1 = STRING:
IF-MIB::ifPhysAddress.2 = STRING: de:ad:be:ef:6c:10
IF-MIB::ifPhysAddress.3 = STRING: de:ad:be:ef:6c:11
IF-MIB::ifAdminStatus.1 = INTEGER: up(1)
IF-MIB::ifAdminStatus.2 = INTEGER: up(1)
IF-MIB::ifAdminStatus.3 = INTEGER: down(2)
IF-MIB::ifOperStatus.1 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: up(1)
IF-MIB::ifOperStatus.3 = INTEGER: down(2)
IF-MIB::ifLastChange.1 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.2 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.3 = Timeticks: (0) 0:00:00.00
IF-MIB::ifInOctets.1 = Counter32: 123664
IF-MIB::ifInOctets.2 = Counter32: 908480093
IF-MIB::ifInOctets.3 = Counter32: 3474496004
IF-MIB::ifInUcastPkts.1 = Counter32: 0
IF-MIB::ifInUcastPkts.2 = Counter32: 0
IF-MIB::ifInUcastPkts.3 = Counter32: 0
IF-MIB::ifInNUcastPkts.1 = Counter32: 0
IF-MIB::ifInNUcastPkts.2 = Counter32: 0
IF-MIB::ifInNUcastPkts.3 = Counter32: 0
IF-MIB::ifInDiscards.1 = Counter32: 0
IF-MIB::ifInDiscards.2 = Counter32: 0
IF-MIB::ifInDiscards.3 = Counter32: 13
IF-MIB::ifInErrors.1 = Counter32: 0
IF-MIB::ifInErrors.2 = Counter32: 0
IF-MIB::ifInErrors.3 = Counter32: 0
IF-MIB::ifInUnknownProtos.1 = Counter32: 0
IF-MIB::ifInUnknownProtos.2 = Counter32: 0
IF-MIB::ifInUnknownProtos.3 = Counter32: 0
IF-MIB::ifOutOctets.1 = Counter32: 123664
IF-MIB::ifOutOctets.2 = Counter32: 2855019735
IF-MIB::ifOutOctets.3 = Counter32: 3474494922
IF-MIB::ifOutUcastPkts.1 = Counter32: 1128
IF-MIB::ifOutUcastPkts.2 = Counter32: 1903653
IF-MIB::ifOutUcastPkts.3 = Counter32: 2459310
IF-MIB::ifOutNUcastPkts.1 = Counter32: 0
IF-MIB::ifOutNUcastPkts.2 = Counter32: 0
IF-MIB::ifOutNUcastPkts.3 = Counter32: 0
IF-MIB::ifOutDiscards.1 = Counter32: 0
IF-MIB::ifOutDiscards.2 = Counter32: 0
IF-MIB::ifOutDiscards.3 = Counter32: 0
IF-MIB::ifOutErrors.1 = Counter32: 0
IF-MIB::ifOutErrors.2 = Counter32: 0
IF-MIB::ifOutErrors.3 = Counter32: 0
IF-MIB::ifOutQLen.1 = Gauge32: 0
IF-MIB::ifOutQLen.2 = Gauge32: 0
IF-MIB::ifOutQLen.3 = Gauge32: 0
IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.3 = OID: SNMPv2-SMI::zeroDotZero

Step 5: Run command service snmp table local-agent v3 USER2TEST oid ifTable at DUT0 and check if output matches the following regular expressions:

SNMP table:.*::ifTable
Show output
SNMP table: IF-MIB::ifTable

 ifIndex                  ifDescr           ifType ifMtu  ifSpeed     ifPhysAddress ifAdminStatus
       1                       lo softwareLoopback 65536 10000000                              up
       2 Red Hat, Inc Device 0001   ethernetCsmacd  1500        0 de:ad:be:ef:6c:10            up
       3 Red Hat, Inc Device 0001   ethernetCsmacd  1500        0 de:ad:be:ef:6c:11          down

SNMP table IF-MIB::ifTable, part 2

 ifOperStatus ifLastChange ifInOctets ifInUcastPkts ifInNUcastPkts ifInDiscards ifInErrors
           up 0:0:00:00.00     123664             0              0            0          0
           up 0:0:00:00.00  908480093             0              0            0          0
         down 0:0:00:00.00 3474496004             0              0           13          0

SNMP table IF-MIB::ifTable, part 3

 ifInUnknownProtos ifOutOctets ifOutUcastPkts ifOutNUcastPkts ifOutDiscards ifOutErrors ifOutQLen
                 0      123664           1128               0             0           0         0
                 0  2855019735        1903653               0             0           0         0
                 0  3474494922        2459310               0             0           0         0

SNMP table IF-MIB::ifTable, part 4

              ifSpecific
 SNMPv2-SMI::zeroDotZero
 SNMPv2-SMI::zeroDotZero
 SNMPv2-SMI::zeroDotZero

Step 6: Run command service snmp table remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output matches the following regular expressions:

SNMP table:.*::ifTable
Show output
SNMP table: IF-MIB::ifTable

 ifIndex                  ifDescr           ifType ifMtu  ifSpeed     ifPhysAddress ifAdminStatus
       1                       lo softwareLoopback 65536 10000000                              up
       2 Red Hat, Inc Device 0001   ethernetCsmacd  1500        0 de:ad:be:ef:6c:10            up
       3 Red Hat, Inc Device 0001   ethernetCsmacd  1500        0 de:ad:be:ef:6c:11          down

SNMP table IF-MIB::ifTable, part 2

 ifOperStatus ifLastChange ifInOctets ifInUcastPkts ifInNUcastPkts ifInDiscards ifInErrors
           up 0:0:00:00.00     123664             0              0            0          0
           up 0:0:00:00.00  908480093             0              0            0          0
         down 0:0:00:00.00 3474496004             0              0           13          0

SNMP table IF-MIB::ifTable, part 3

 ifInUnknownProtos ifOutOctets ifOutUcastPkts ifOutNUcastPkts ifOutDiscards ifOutErrors ifOutQLen
                 0      123664           1128               0             0           0         0
                 0  2855019735        1903653               0             0           0         0
                 0  3474494922        2459310               0             0           0         0

SNMP table IF-MIB::ifTable, part 4

              ifSpecific
 SNMPv2-SMI::zeroDotZero
 SNMPv2-SMI::zeroDotZero
 SNMPv2-SMI::zeroDotZero

Note

After adding a view that excludes the ‘1.3.6.1.2.1.2‘ oid, retrieving information about interfaces shouldn’t be allowed.

Step 7: Set the following configuration in DUT0:

set service snmp user USER2TEST view NOIFCS
set service snmp view NOIFCS oid 1.3.6.1.2.1.2 type excluded

Step 8: Run command service snmp walk local-agent v3 USER2TEST oid ifTable at DUT0 and check if output does not match the following regular expressions:

::ifDescr\.1 = STRING: "?lo"?
Show output
IF-MIB::ifTable = No more variables left in this MIB View (It is past the end of the MIB tree)

Step 9: Run command service snmp walk remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output does not match the following regular expressions:

::ifDescr\.1 = STRING: "?lo"?
Show output
IF-MIB::ifTable = No more variables left in this MIB View (It is past the end of the MIB tree)

Step 10: Run command service snmp table local-agent v3 USER2TEST oid ifTable at DUT0 and check if output does not match the following regular expressions:

SNMP table:.*::ifTable
Show output
IF-MIB::ifTable: No entries

Step 11: Run command service snmp table remote-agent 10.0.0.1 v3 USER2TEST oid ifTable at DUT1 and check if output does not match the following regular expressions:

SNMP table:.*::ifTable
Show output
IF-MIB::ifTable: No entries