I assume these issues are on the same SSID? I would check the SSID config, make sure it is in bridge mode. I am thinking the Sonicwall might be configured to allow for the LAN subnet and not the Meraki DHCP subnet that is NATd. Another option is to create a new SSID for testing, remove any restrictions and check the results. ... View more

I never asked. You definitely have no splash page on the SSID set and if you are using a small MX as your firewall, also no splash pages on the VLAN interface? You able to paste a screenshot of your SSID settings? ... View more