In my experience, you can only NAT from outside to inside LAN and Site-to-site VPN Translation https://documentation.meraki.com/MX/NAT_and_Port_Forwarding/Port_Forwarding_and_NAT_Rules_on_the_MX https://documentation.meraki.com/MX/Site-to-site_VPN/Using_Site-to-site_VPN_Translation
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