I've received a /29 allocation of IPv4 addresses from my ISP. For sake of discussion, I will call this the 123.0.0.16/29
network.
This IP space is divided as follows:
123.0.0.16: Network
123.0.0.17-21: Free to use
123.0.0.22: Gateway
123.0.0.23: Broadcast
My ISP uses PPPoE and DHCP, and my router, a MikroTik, automatically picked up the gateway address to use as its own. Any clients on the LAN side will appear as this address on the WAN via the magic of NAT.
Now, I have a host I want to assign the .17
address, and have it available on that address through the WAN.
I have no idea how, exactly, to configure this on the MikroTik.
I do believe it needs configuration of some kind, since it wasn't as simple as dropping something like this interfaces
file on the host in question:
auto eth0:0
iface eth0:0 inet static
address 123.0.0.17
netmask 255.255.255.248
gateway 123.0.0.22
From what I understand of basic networking, the router probably needs either a bridge or a static route of some kind set up, since right now it has no idea what to do with a packet claiming to come from 123.0.0.17
on the LAN side.
Am I on the right track here, and what do I need to be looking at in my router config?