I probably have a fairly unique situation here. I have had a Lexmark CX510de for a couple of months now. I work from home and the printer is probably a bit of overkill but the whole family also want to use it.
I have two phone lines with fibre broadband on each, with different providers. I fix PC's and do a lot of updates downloading when I do PC factory resets. There is also a lot of TV streaming goes on in our house as well. I tend to use one network and everyone else uses the other.
So, the CX510de is connected to one network, the one I use most. However other people in the house want to be able to print but their devices are usually on the other network.
I know I could use port forwarding on the router and print via the internet but would prefer not to do this for security reasons, and I am not keen on using a VPN either. Other users...