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V-283899

CAT II (Medium)

The Nokia router must not be configured to use IPv6 Site Local Unicast addresses.

Rule ID

SV-283899r1203946_rule

STIG

Nokia Service Router OS 25.x Router Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

As currently defined, site local addresses are ambiguous and can be present in multiple sites. The address itself does not contain any indication of the site to which it belongs. The use of site-local addresses could adversely affect network security through leaks, ambiguity, and potential misrouting as documented in section 2 of RFC3879. RFC3879 formally deprecates the IPv6 site-local unicast prefix FEC0::/10 as defined in RFC3513.

Check Content

Review the router configuration to ensure FEC0::/10 IP addresses are not defined. 

Use the command below and verify IPv6 addresses are defined for all interfaces:

- show router interface "TO-CORE" detail | match "IPv6 Address"
IPv6 Address     : 2001:db8:100:1::1/64

If IPv6 Site Local Unicast addresses are defined, this is a finding.

Fix Text

Configure the router using authorized IPv6 addresses using the example below: 

- configure router interface TO-CORE
- config>router>if$ ipv6 address 2001:db8:100:1::1/64
- config>router>if$ port 1/1/c8/1
- config>router>if$ exit all