NAT with same network

RouterOS General
1

I would like to configure RouterOS so that it will “NAT” for a private network which has the same address range as the public network, including default route. This is so that the private network can be used for testing, but have internet access. For example:

default route:1.2.3.1/20 ------eth0:1.2.3.2/20[ROUTERBOARD]eth1:1.2.3.1/20 default route:1.2.3.1/20-----

I would appreciate suggestions. If the internal and external networks are different, then there is no problem, but if they are the same, then having only one routing table creates problems.

Andrew Hilborne

2

From routing point of view this :1.2.3.2/20[ROUTERBOARD]eth1:1.2.3.1/20
make two /ip route entries with the same network on different interfaces, this is not right.

What is the reason to use the same network on public and local interfaces, if it is masqueraded?