Isolate VLANs on a SonicWALL

I have a SonicWALL NSA 2400 with users who connect over it, each user on their own VLAN. I'm currently up to 5 VLANs, but we will be adding several more users pretty soon.

If I create deny rules preventing each VLAN from being able to access other VLANs, the number of rules I have to add just goes up exponentially as I add each new VLAN.

Is there an easier way to isolate the traffic on these VLANs so they cannot send traffic to each other?
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If we want to DENY specific VLANs across the trunk, we can do that. For example, if we want to allow vlans 1-500 through the trunk, and NEVER allow vlans 501-1000, we could use the command:switchport trunk allowed vlan 1-500 (which would exclude 501-1000)This would NEVER allow VLAN traffic for 501-1000 to travel over the trunk. -
where exactly is the InterVLAN routing happening. If on SonicWALL, we can put the newly created VLANs on their own zones and disable the interface trust out.

If the intervlan routing is happening on the switch (although unlikely in your scenario), we can create ACLs to block traffic between VLANs.

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highdellAuthor Commented:
The VLAN routing is happening on the SonicWALL, but even when I disable interface trust on the LAN zone (to which all my VMs' interfaces belong), my VM on VLAN 8 can still ping my VM on VLAN 3. All of them can ping all of them.

I have no special firewall rules enabled to allow ping. Interface trust WAS enabled. When I disable it, is there some special firewall rule I also need to remove or something?
highdellAuthor Commented:
However, adding a new zone and placing all the VLANs into this zone without enabling interface trust seems to do the trick. Thank you for reminding me of the interface trust!
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