Newbie alert! I am basically complete zero with RouterOS. I am a software engineer, so have some technical background, but have zero hardware background. Therefore my terminology may be off, but I hope the intention will be clear.
I wanted to hear an advice on a simple task I need to achieve.

Here is my setup:
1) I have a Comcast router with an IP 192.168.0.1
2) There is a printer connected to this network on address 192.168.0.12
3) There is a Mikrotik router connected to the Comcast router with its internal network IP address 192.168.88.1

I need to make a printer (2) visible in 192.168.88.X network. For example with an address 192.168.88.12

How do I do the rerouting and/or port forwarding?

And as a side question: if IP address is dynamic, is it better to reroute based on the MAC address instead? is it doable?

Thank you in advance!

Hi Dimag,

I assume the Comcast GW has no filters / firewall for local traffic, therefore port forwarding should not be needed.

How/if you can use the printer will depend a lot on your printer itself and its support for network printing.
You will need to install the printer on the local machine (PC etc.) with the IP address (not name/domain etc.).
Not all printer do work well with such a setup. HP for instance does, Epson does not (just personal experience).

Then it will depend on your Mikrotik setup what firewall filtering you have:
- if you scan/print from the PC, the default forward accept rule should do it.
But if you filter ICMP there might be an issue (but to be seen, and in case log those firewall rules).

There is no need to add route, if you have default route on 0.0.0.0 on 192.168.0.1, as printer .12 is in same subnet as your GW
and thus Mikrotik will know where to route the IP address of the printer.

If it does not work, log your firewall drop rules and search for the IP address of the printer and see where it get filtered.

Let me know if that works out.

I would recommend try to ping the ip of the printer you want to add to the network if you can ping it then all you need to do is add that printer into system from control panel but if you cannot ping it then just put some static routes that can be the only reason if you cannot ping that printer.

Sounds like a double nat scenario and you are effed..........
I would put the printer on the second network and port forward all requests for printer ports be sent to the right IP address behind the second router.
That way it will appear to be ON THE LAN for the primary network and it will be within the LAN on the secondary network.