Rule Types Palo Alto Firewalls

Different rule types on Palo Alto firewalls mean that you can exercise even more control over your traffic, ensuring that traffic can only traverse different zones or that traffic is restricted to its own zone, this video explains the rule types as well as some of the options with rules.
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[@edwardguzinski9853]

So is the difference between an interzone and universal rule that with an interzone, the traffic only flows one way (Source Zone A to Dest Zone B but B can't go back to A) but with a universal one it's bidirectional?

[@mode4480]

Hi,
Within the Palo Alto firewall there are two types of traffic flow with regard to zones, either intrazone or interzone, so if we had a rule with A,B and C zones in both the source and the destination a universal rule would allow intrazone traffic to flow (in this case A to A, B to B, C to C) and interzone traffic, A to B or C if we were to use interzone rule type A to A would not be permitted and if we use intrazone rule type, A to A would be permitted but A to B would not.
Also when creating intrazone rules the destination zone is greyed out in the policy making the security policy a little easier to read.
Hope this helps, and thank you for watching!