I know this is an older thread, but I have a similar issue.  I have a sonitrol panel as well with a new Meraki 75 firewall.  I put in the port forwarding rule above.  However, I still have some issue as the Sonitrol panel does not connect outbound to the Sonitrol central site (I cannot arm the panel inside the business and disarms do not show up on the Sonitrol history).  I have a Polycom ATA between the Sonitrol alarm system and the Meraki - it gives the Sonitrol a telephone line since I can't get a POTS line anymore. I am wondering if I need anything else configured in the Meraki.  Also, wondering if any of you also use an ATA device connected to the Sonitrol.  If so, is yours different brand that I might try. ... View more

Initially both the LAN and WAN will be linked across all ports so the WAN should find the internet via the LAN.  Make sure nothing important is connected to the MX before the config has applied!  ... View more

The QoS settings on MS switches don't need routing so the outbound queuing is respected for matching traffic.   However you cannot move your audio LAN up to the MX if you require multicast support since the MX itself does not have IGMP querier nor PIM support.  That task can only be done on your MS switch L3 interface.   So it's best to just match the traffic types on your MS switches or just trust what's coming from that VLAN and make sure your needed DSCP values are present in the DSCP to CoS queue mapping section. ... View more

Thank you both.  This was very helpful. ... View more