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 drop IPv6 packets containing a Hop-by-Hop or Destination Option extension header with an undefined option type.

DISA Rule

SV-283845r1203784_rule

Vulnerability Number

V-283845

Group Title

SRG-NET-000364-RTR-000206

Rule Version

NOKI-RT-000270

Severity

CAT II

CCI(s)

• CCI-002403 - Only allow incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

10

Fix Recommendation

Configure the router to drop all inbound IPv6 packets containing an undefined option type value regardless of whether they appear in a Hop-by-Hop or Destination Option header.

Configure the IPv6 filter, as shown in the example below:

Note: This will drop all Hop-by-Hop Option headers.

- configure filter ipv6-filter 40 create
- config>filter>ipv6-filter# default-action forward
- config>filter>ipv6-filter# entry 10 create
- config>filter>ipv6-filter>entry$ match hop-by-hop-opt true
- config>filter>ipv6-filter>entry$ action drop
- config>filter>ipv6-filter>entry$ exit all

Apply the IPv6 filter to the interface:

- configure router interface "TO-PE2" ingress filter ipv6 40

Check Contents

This requirement is not applicable for the DODIN Backbone.

Review the router configuration and determine if filters are bound to the applicable interfaces to drop all inbound IPv6 packets containing an undefined option type value regardless of whether they appear in a Hop-by-Hop or Destination Option header. Undefined values are 0x02, 0x03, 0x06, 0x9 - 0xE, 0x10 - 0x22, 0x24, 0x25, 0x27 - 0x2F, and 0x31 - 0xFF.

Verify the IPv6 filter has the HopByHop option set to "True", as shown in the example below:

- show filter ipv6 40

Entry : 10 (Inactive)
Description : (Not Specified)
Log Id : n/a
Src. IP : ::/0
Src. Port : n/a
Dest. IP : ::/0
Dest. Port : n/a
Next Header : Undefined
Dscp : Undefined
ICMP Type : Undefined ICMP Code : Undefined
Sampling : Off Int. Sampling : On
Tcp-flag : (Not Specified)
Fragment : Off
HopByHop Opt : True Routing Type0 : Off

Verify an "Ing IPv6 Flt" has been applied to the interface, as shown in the example below:

- show router interface "TO-PE2" detail | match "Ingr IPv6 Flt"
Egr IPv6 Flt : none Ingr IPv6 Flt : 40

If the router is not configured to drop IPv6 packets containing a Hop-by-Hop or Destination Option extension header with an undefined option type, this is a finding.

Vulnerability Number

V-283845

Documentable

False

Rule Version

NOKI-RT-000270

Severity Override Guidance

This requirement is not applicable for the DODIN Backbone.

Review the router configuration and determine if filters are bound to the applicable interfaces to drop all inbound IPv6 packets containing an undefined option type value regardless of whether they appear in a Hop-by-Hop or Destination Option header. Undefined values are 0x02, 0x03, 0x06, 0x9 - 0xE, 0x10 - 0x22, 0x24, 0x25, 0x27 - 0x2F, and 0x31 - 0xFF.

Verify the IPv6 filter has the HopByHop option set to "True", as shown in the example below:

- show filter ipv6 40

Entry : 10 (Inactive)
Description : (Not Specified)
Log Id : n/a
Src. IP : ::/0
Src. Port : n/a
Dest. IP : ::/0
Dest. Port : n/a
Next Header : Undefined
Dscp : Undefined
ICMP Type : Undefined ICMP Code : Undefined
Sampling : Off Int. Sampling : On
Tcp-flag : (Not Specified)
Fragment : Off
HopByHop Opt : True Routing Type0 : Off

Verify an "Ing IPv6 Flt" has been applied to the interface, as shown in the example below:

- show router interface "TO-PE2" detail | match "Ingr IPv6 Flt"
Egr IPv6 Flt : none Ingr IPv6 Flt : 40

If the router is not configured to drop IPv6 packets containing a Hop-by-Hop or Destination Option extension header with an undefined option type, this is a finding.

Check Content Reference

M

Target Key

5746