IP forwarding for IPv4 must not be enabled, unless the system is a router.

From SOLARIS 10 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-28581r1_rule IP forwarding for IPv4 must not be enabled, unless the system is a router.

Vulnerability discussion

If the system is configured for IP forwarding and is not a designated router, it could be used to bypass network security by providing a path for communication not filtered by network devices.

Check content

Determine if the system is configured for IPv4 forwarding. # svcs | grep svc:/network/ipv4-forwarding If the service is enabled, this is a finding.

Fix text

Disable IPv4 forwarding on the system. # svcadm disable svc:/network/ipv4-forwarding

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