I know how this topology on a Cisco Router, can be implemented
but on a Meraki MX64, I can't figure, please show me step by step how to config this with GUI, I can't find a way in this GUI to associate one specific valid public IP address+port to a private address
Question 1)
First as you can see from the picture of MX64 itself, we have one uplink(internet link) and 4 port to internal LAN
so how can we have 2 uplinks as this menu is suggesting, I only see one port?
Question 2)
Port Forwarding
I think for this part I need to go to
Appliance status->Uplink, and click on that pen next to WAN
Switch6500(config)#int fa1/1
Switch6500(config-if)#ip add 81.1.1.30 255.255.255.252
For this part you need to goto Security -> Firewall but I can't figure how to associate public port and IP to private
Switch6500(config)#ip nat inside source static 192.168.1.50 80 81.1.1.30 80
Switch6500(config)#ip nat inside source static 192.168.1.51 80 81.1.1.31 80
Switch6500(config)#int fa1/1
Switch6500(config-if)#ip nat inside
Switch6500(config)#int fa1/2
Switch6500(config-if)#ip nat outside
Question 3)
Overloading with PAT
Switch3650(config)#access-list 1 permit 192.168.1.1 0.0.0.31 (overload the range from 192.168.1.1 to 192.168.1.32 on ip 81.1.1.30 )
Switch3650(config)#ip nat inside source list 1 81.1.1.30 overload