Intrazone default- what gets inspected?

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Intrazone default- what gets inspected?

L1 Bithead



For traffic that matches the intrazone default policy,  and assuming there are no security profiles for anti-virus, anti-malware, threat protection. etc,  Is there any inspection performed? 


Reason I ask- I found an article on the Knowledge base about increasing performance for SMB traffic by enabling an application override for the traffic.  Would application override have any effect on this traffic?






Cyber Elite
Cyber Elite

hi @fmurray


No threat scanning is performed as the default policy does not have security profiles, but app-id is performed.

If you're seing performance issues with SMB and suspect app-id, you could try to create a security policy where you enable 'Disable Server Response Inspection', which will allow you to still apply some security checks on smb (as this is a popular protocol to spread infections) but only for packets originating from the client

Disable Server Response Inspection.png


Or if you need to turn off app-id altogether, create an app override policy which will turn off everything for the new custom app replacing smb (app override works independently of the session hitting a custom security policy or a default one)




Tom Piens
PANgurus - Strata specialist; config reviews, policy optimization

Cyber Elite
Cyber Elite


What we did is add a deny all policy right befor the default policies. That way we had to create policies that had profiles to enable the scanning. While this does take a bit of overhead. It wasnt really that bad. 


I know its a bit off topic.



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