Can you do a static NAT inside a router from a network if that network is not defined on an interface of the router?
Here is my situation. We are moving to a new ISP and a new IP block
router s0 - 192.168.1.1/24
router e0 - 172.16.1.1/24
fw e1 - 172.16.1.2/24
fw e0 - 10.1.1.1/24
So for inbound traffic, the flow is from router s0 -> router e0 -> fw e1 -> fw e0 -> LAN. Our 10.1.1.0/24 network is actually a public IP network that was not using NAT.
My new config will be taking out the FW and putting a new router in place with the FW feature set. So the 172.16.1.0/24 network will be eliminated. Here will be our new IP setup.
Router s0 192.168.2.1/24
Router e0 10.1.1.1/24 - I will be keeping the same old IP scheme for the LAN. I need the router e0 to be in the same LAN as the fw e0 was because I lost the hop between the fw and the router. Anyway, I know have a new IP address block that I will need to use for NAT to come from our Internet to the LAN.
New IP block - 10.10.10.0/24
I want to be able to do the following:
Mail server on LAN - 10.1.1.10
I want to be able to do a command like:
ip nat inside source static 10.1.1.10 10.10.10.10
Will using the 10.10.10.10 address on the router work? Even though neither interface has an ip address on the 10.10.10.0/24 network, will the router still route this ip and then translate to my LAN?
Do I have to add something like this?
ip route 10.10.10.0 255.255.255.0 null0 - to populate the routing table?
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