Three boxes running three different ubuntu flavours (14.04, 14.10, 15.04). I'm trying to get all of these to talk between themselves, while being on different subnets, and I can't figure how, yet.
Problem is that my ISP provides a router for the TV, phone and internet. We cannot change the hub's lan range (192.168.2.0/24), while my lan with my own router is on 10.0.0.0/13 (and I don't want to change it).
Here's the setup:
My ISP's hub/router is on 192.168.2.1, so that's the gw facing internet. My own router is connected (DHCP) to this router, its LAN address is thus in 192.168.2.0/24 .
I have PC1, PC2 and PC3 in 10.0.0.0/13, going on the Net thru my own router, which is connected onto my ISP-provided router in 192.168.2.0/24. Those PCs can connect onto my 192.168.2.1.
Now, I have to connect a PC directly onto my ISP-provided router; it'll have a 192.168.2.0/24 address, and cannot see other devices into 10.0.0.0/13 . I'm not that well-versed in routing, I'm wondering what can I do to get it to see PCs onto 10.0.0.0/13 ?
Oh, and the easy way is out : I cannot add a static route on 192.168.2.1 (the ISP gateway).