The system must not have IP tunnels configured.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-001551

SV-38929r1_rule The system must not have IP tunnels configured.

Vulnerability discussion

IP tunneling mechanisms can be used to bypass network filtering.

Check content

Determine if any IP tunnels are configured on the system. Check for IP tunnels. # lstun -a # ifconfig -a | grep -e gre -e gif -e cti -e sit If any tunnels are listed, this is a finding.

Fix text

Remove the configuration for any IP tunnels from the system. Remove tunnels listed with the lstun command. #rmtun -t -d Remove the tunneled IP interfaces. #ifconfig detach #rmdev -Rdl

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