STIGQter STIGQter: STIG Summary: Infrastructure Router Security Technical Implementation Guide Juniper Version: 8 Release: 29 Benchmark Date: 25 Jan 2019: The router must use its loopback or OOB management interface address as the source address when originating SNMP traffic.

DISA Rule

SV-15347r2_rule

Vulnerability Number

V-14675

Group Title

SNMP traffic does not use loopback address or OOB Management interface.

Rule Version

NET0900

Severity

CAT III

CCI(s)

Weight

10

Fix Recommendation

Configure the device to use its loopback or OOB management interface address as the source address when originating SNMP traffic.

Check Contents

Review the configuration and verify the loopback interface address is used as the source address when originating SNMP traffic. If the device is managed from an OOB management network, the OOB interface must be used instead

Step 1: Verify that a loopback address has been configured with an IP address. The configuration should look similar to the following.

interfaces {
lo0 {
unit 0 {
family inet {
address 10.10.2.1/32;
}
}
}

Note: Only one loopback interface can be configured on Juniper routers; however, multiple addresses can be defined.

Step 2: Verify that SNMP is configured to use the loopback address by comparing the source address defined for SNMP with the address configured for the loopback interface. You should find a configuration similar to the examples below:

snmp {
clients {
default restrict;
10.10.2.111/32;
}
trap-options {
source-address 10.10.2.1;
}
}

Note: If source-address is not specified, then the default-address-selection under system hierarchy must be configured. Configuring system default-address-selection will enable the router to use the loopback interface as the source address for most locally generated IP packets. This configuration would appear as follows:

system {
default-address-selection;

}
}

Vulnerability Number

V-14675

Documentable

False

Rule Version

NET0900

Severity Override Guidance

Review the configuration and verify the loopback interface address is used as the source address when originating SNMP traffic. If the device is managed from an OOB management network, the OOB interface must be used instead

Step 1: Verify that a loopback address has been configured with an IP address. The configuration should look similar to the following.

interfaces {
lo0 {
unit 0 {
family inet {
address 10.10.2.1/32;
}
}
}

Note: Only one loopback interface can be configured on Juniper routers; however, multiple addresses can be defined.

Step 2: Verify that SNMP is configured to use the loopback address by comparing the source address defined for SNMP with the address configured for the loopback interface. You should find a configuration similar to the examples below:

snmp {
clients {
default restrict;
10.10.2.111/32;
}
trap-options {
source-address 10.10.2.1;
}
}

Note: If source-address is not specified, then the default-address-selection under system hierarchy must be configured. Configuring system default-address-selection will enable the router to use the loopback interface as the source address for most locally generated IP packets. This configuration would appear as follows:

system {
default-address-selection;

}
}

Check Content Reference

M

Responsibility

Information Assurance Officer

Target Key

510

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