Configuring a Zone Without Interfaces

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L0 Member

Configuring a Zone Without Interfaces

It is possible to configure a zone without any interfaces specified? 
Will the rule containing this zone be applied ?

Will traffic that match this rule be accepted from any source and destination interface? 

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Community Team Member

Hi,

 

Yes you can configure zones without adding them to an interface :

 

Zone without interfaceZone without interface

 

You can even configure this zone in the rulebase :

 

Zone in rulebaseZone in rulebase

 

 Correct me if I'm wrong but as nothing is tied to this zone, this rule will never be matched.

 

-Kim.

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L7 Applicator

Firewall lookup from zone to zone is matched based on the ingress and egress interface of the traffic.  

 

so if a zone has no interfaces, the zone and associated rules will never be used for any traffic.

Steve Puluka BSEET - IP Architect - DQE Communications (Metro Ethernet/ISP)
ACE PanOS 6; ACE PanOS 7; ASE 3.0; PSE 7.0 Foundations & Associate in Platform; Cyber Security; Data Center
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Community Team Member

@shaunyt, My question for you is:

 

Why were you wanting to create a zone without interfaces? 

What were you trying to accomplish?

Stay Secure,
Joe
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L4 Transporter

A use case would be the situation that a rule is deployed from Panorama to multiple firewalls and some dont have this zone. So commit will fail. When you add such a "dummy" zone with no interface assigned the commit will succeed.

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