Hi, I leave you links that could help you: External IP: https://community.meraki.com/t5/Security-SD-WAN/How-to-Block-external-IP-s-on-MX100/td-p/2644 MX Firewall Settings: https://documentation.meraki.com/MX/Firewall_and_Traffic_Shaping/MX_Firewall_Settings Blocking Inbound Traffic on MX Security Appliances: https://documentation.meraki.com/MX/NAT_and_Port_Forwarding/Blocking_Inbound_Traffic_on_MX_Security_Appliances I hope it helps you✌
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