STIGQter: STIG Summary: Nokia Service Router OS 25.x Router Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 28 Apr 2026:

The Nokia perimeter router must be configured to filter egress traffic at the internal interface on an inbound direction.

DISA Rule

SV-283905r1203964_rule

Vulnerability Number

V-283905

Group Title

SRG-NET-000205-RTR-000005

Rule Version

NOKI-RT-000940

Severity

CAT II

CCI(s)

• CCI-001097 - Monitor and control communications at the external managed interfaces to the system and at key managed interfaces within the system.

Weight

10

Fix Recommendation

This requirement is not applicable for the DODIN Backbone.

Configure an egress ACL bound to the internal interface in an inbound direction to filter traffic leaving the network.

Configure an IPv4 filter using the example below:

- configure filter ip-filter 10 create
- config>filter>ip-filter# entry 10 create
- config>filter>ip-filter>entry$ match src-ip 2.2.2.2/32
- config>filter>ip-filter>entry$ action forward
- config>filter>ip-filter>entry$ exit all

Configure an IPv6 filter using the example below:

- configure filter ipv6-filter 20 create
- config>filter>ipv6-filter# entry 10 create
- config>filter>ipv6-filter>entry$ match src-ip 2001:acad:1234:200::2/128
- config>filter>ipv6-filter>entry$ action forward
- config>filter>ipv6-filter>entry$ exit
- config>filter>ipv6-filter# exit all

Apply IPv4 and IPv6 filters to the interface in the egress direction:

- configure router interface "TO-PE2" egress filter ip 10
- configure router interface "TO-PE2" egress filter ipv6 20

Check Contents

This requirement is not applicable for the DODIN Backbone.

Review the router configuration to verify the egress ACL is bound to the internal interface in an inbound direction.

To verify all interfaces have the ingress filter assigned, verify fields "Egress Filter" and "Egr IPv6 Flt" for all interfaces:

- show router interface "TO-PE2" detail | match "Egress Filter"

Egress Filter : 10 Ingress Filter : none

- show router interface "TO-PE2" detail | match "Egr IPv6 Flt"

Egr IPv6 Flt : 20 Ingr IPv6 Flt : none

If the router is not configured to filter traffic leaving the network at the internal interface in an inbound direction, this is a finding.

Vulnerability Number

V-283905

Documentable

False

Rule Version

NOKI-RT-000940

Severity Override Guidance

This requirement is not applicable for the DODIN Backbone.

Review the router configuration to verify the egress ACL is bound to the internal interface in an inbound direction.

To verify all interfaces have the ingress filter assigned, verify fields "Egress Filter" and "Egr IPv6 Flt" for all interfaces:

- show router interface "TO-PE2" detail | match "Egress Filter"

Egress Filter : 10 Ingress Filter : none

- show router interface "TO-PE2" detail | match "Egr IPv6 Flt"

Egr IPv6 Flt : 20 Ingr IPv6 Flt : none

If the router is not configured to filter traffic leaving the network at the internal interface in an inbound direction, this is a finding.

Check Content Reference

M

Target Key

5746