Multicast required for Intrazone policy?

CPatterson1 — Mon, 18 Apr 2022 22:20:59 GMT

My understanding is the intrazone default policy allowed anything in a layer 3 vlan to talk to anything in that same vlan on any protocol. So if I have layer 3 vlan of 10.31.25.0/24 and host a is 10.31.25.148 and host b is 10.31.25.210. In theory everything is allowed between the two of them. Does that include Multicast? Note Multicast is NOT enabled on the VR (virtual router)

Thank you

Re: Multicast required for Intrazone policy?

TomYoung — Tue, 19 Apr 2022 02:26:21 GMT

Hi @CPatterson1 ,

Are host a and host b connected to layer 2 ports on the firewall? Then all traffic is allowed between the two hosts with the intrazone-default rule as long as they are in the same L2 zone. Also, the 5th paragraph implies that L2 ports do not forward multicast packets -> https://docs.paloaltonetworks.com/pan-os/10-0/pan-os-admin/networking/ip-multicast-overview.

If the hosts are connected to a switch, then the switch will forward packets (including multicast) directly between the hosts and not to the firewall.

Thanks,

Tom

topic Multicast required for Intrazone policy? in General Topics

Multicast required for Intrazone policy?

Re: Multicast required for Intrazone policy?