MX port

[RahulPrasadh]

Is it possible to assign a Public IP address to port 3 of Meraki router which is under VLAN interface and how can we configure?

[RWelch]

You can setup Port Forwarding and NAT Rules on the MX:

https://documentation.meraki.com/MX/NAT_and_Port_Forwarding/Port_Forwarding_and_NAT_Rules_on_the_MX

[Brash]

Public IP's are assigned only to the WAN ports on the MX.
You cannot assign IP addresses directly to LAN ports.

As said above however, you can configure Port Forwarding or 1:1 NAT rules under "Security & SD-WAN" -> "Firewall"