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"Null" Policy Question - Baseline Policy(Sensor) between Interface Policy 1A-1B and Sub Interface VLAN.

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Hello, Please advise us behavior about NULL policy in Sub-Interface VLAN scenario ?

Sensor Policy:ALL Inclusive with audit

Interface Policy 1A-1B:Default Inline IDS

Sub Interface Policy:VLAN 200 : NULL

If we create null policy for VLAN ID 200 and if traffic match.

then traffic will be thru the Sensor with No DETECTION ? and No scan in All Inclusive with audit in Sensor body policy ?

which scenario is correct behavior ?

1 .vlan traffic:200 ---> sub interface policy ->  sensor policy:all inclusive with audit 

or

2. vlan traffic:200 --> sub interface: vlan 200:null policy-> Ignore this traffic because of Null policy match. So VLAN 200 traffic will not go Sensor body Policy:All inclusive with audit.

Does anyone know which one ?

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d_aloy
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Re: "Null" Policy Question - Baseline Policy(Sensor) between Interface Policy 1A-1B and Sub Interface VLAN.

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Hi hogehoge

If you have a VLAN subiterface, then all traffic matching that VLAN (200 in your case) will have the subinterface policy applied (NULL).

All other traffic will have the interface level policy applied (AIWA)

Regards

David

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d_aloy
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Re: "Null" Policy Question - Baseline Policy(Sensor) between Interface Policy 1A-1B and Sub Interface VLAN.

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Hi hogehoge

If you have a VLAN subiterface, then all traffic matching that VLAN (200 in your case) will have the subinterface policy applied (NULL).

All other traffic will have the interface level policy applied (AIWA)

Regards

David

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Re: "Null" Policy Question - Baseline Policy(Sensor) between Interface Policy 1A-1B and Sub Interface VLAN.

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Thank you David I understand about policy. and there are no sensor policy only FW and Recon settings there.

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