Hi @penangit ,   Try having a look at the Firewall Log monitoring tool.  If your MX firmware is 18.2 or newer. You can use this tool to display if the traffic is blocked. I would also suggest to check your Firewall rules as well. See guides below.   https://documentation.meraki.com/MX/Firewall_and_Traffic_Shaping/Firewall_Logging   https://documentation.meraki.com/MX/Firewall_and_Traffic_Shaping/MX_Firewall_Settings       ... View more