The RUCKUS ICX Router must not be configured to use IPv6 Site Local Unicast addresses.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-273666	RCKS-RTR-001030	SV-273666r1110953_rule		Medium

Description

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 has the potential to 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.

STIG	Date
RUCKUS ICX Router Security Technical Implementation Guide	2025-06-03

Details

Check Text (C-77757r1110018_chk)

Review configuration to verify site local unicast addresses (FEC0::/10) have not been defined.

If site local unicast addresses are defined, this is a finding.

Fix Text (F-77662r1110019_fix)

Configure the router to use only authorized IPv6 addresses.