The system must not have 6to4 enabled.

From SOLARIS 10 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-001551

SV-26921r1_rule The system must not have 6to4 enabled.

Vulnerability discussion

6to4 is an IPv6 transition mechanism that involves tunneling IPv6 packets encapsulated in IPv4 packets on an ad-hoc basis. This is not a preferred transition strategy and increases the attack surface of the system.

Check content

# ifconfig -a If a tunnel interface is displayed with an IPv4 tunnel source address, an IPv6 interface address, and no tunnel destination address, this is a finding.

Fix text

Disable the active 6to4 tunnel. # ifconfig down Check the /etc/hostname* files for startup configuration for the tunnel, and edit or delete as appropriate to prevent the tunnel creation on startup.

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