The system must not have IP tunnels configured.

From Oracle Linux 5 Security Technical Implementation Guide

Part of GEN007820

Associated with: CCI-001551

SV-63413r1_rule The system must not have IP tunnels configured.

Vulnerability discussion

IP tunneling mechanisms can be used to bypass network filtering.

Check content

Check for any IP tunnels. # ip tun list # ip -6 tun list If any tunnels are listed, this is a finding.

Fix text

Remove the tunnels. # ip tun del Edit system startup scripts to prevent tunnel creation on startup.

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