I have a device for which I cannot configure the IP settings. The IP address is 192.168.111.111 and the subnet mask is 255.255.255.0
I have no way to change the network settings. I can’t enter a standard gateway or DNS server. Nothing.
My normal network is at 192.168.2.0/24.
Do I have the option of connecting a Mikrotik router in between and giving it, for example, the IP 192.168.2.220 and the Mikrotik router translates all requests to this IP address 1:1 internally to 192.168.111.111 via NAT?
I would be happy if someone could help me with this. Thanks.
Device connected on an ethernet interface of the Mikrotik , this ethernet not a port of the bridge, with its own IP address and mask: eg 192.168.111.1/24
DSTNAT: It is a case of destination nat, usually used for forwarding incoming request on the public IP to a specific local IP https://www.youtube.com/watch?v=Uk22w6a3ynE
In your case the public IP to use is 192.168.2.220 , not 192.17.90.10 as in the youtube.
The destination 192.168.10.10 of the youtube becomes 192.168.111.111.
What ports? You did not mention what you want to forward. Youtube above is with a limited list of ports. (only port 80 ?)
If you want to forward as much ports as possible , see this post: http://forum.mikrotik.com/t/forward-all-ports-except-mikrotik-reserved/84686/1 , which reserves the WinBox port 8291 for the Mikrotik router (not forwarded), but forwards all other.
The ISP exemple is with the ethernet interface in the WAN interface list, what implies that a srcnat or masquerade rule, is also used for the reverse direction.
You may either want to add the incoming 192.168.2.220 ethernet interface to be in the WAN interface list, are modify/add the masquerade rule in the firewall to include that outgoing interface.
Traffic from 192.168.111.111 will then connect as coming from 192.168.2.220.