Navigate

Check: GEN007780

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN007780 (in versions v1 r14 through v1 r10)

Title

The system must not have 6to4 enabled. (Cat II impact)

Discussion

6to4 is an IPv6 transition mechanism involving 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

Determine if there are any 6to4 tunnels configured on the system. #ifconfig -a If there are any sit or cit adapters in the ifconfig listing, this is a finding.

Fix Text

Remove the configuration for any 6to4 tunnels on the system. #ifconfig sit0 detach #rmdev -dl sit0 #ifconfig cit0 detach #rmdev -dl cit0 Set the startup script /etc/rc.net to call autoconf6 with the -6 argument to prevent setting up 6 to 4 tunnels.

Additional Identifiers

Rule ID: SV-38926r1_rule

Vulnerability ID: V-22545

Group Title: GEN007780

Expert Comments

Expert comments are only available to logged-in users.

CCIs

CCIs tied to check.

Number	Definition
CCI-001551	The organization defines approved authorizations for controlling the flow of information between interconnected systems.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-4	Information Flow Enforcement