Access dstnat/netmap from same subnet

I’m wondering how/if I can access the external natted address from the same subnet as that external natted address is on. For example, my external nat address is 100.0.0.1/24 which maps to an internal server of 192.168.0.1/24. My routerboard has addresses on both networks 192.168.0.254/24 and 100.0.0.254/24 I have another machine with an address of 100.0.0.3/24 on the same network as the routerboard’s 100.0.0.254/24 address. I can’t access the natted address from the 100.0.0.3 machine, I can access it if I route traffic through the routerboard from another network. Is there something special I need to enable to make this work (proxy-arp, etc)?


Thanks for any help,
pace

By adding the natted IP address (100.0.0.1) to the routerboard, I’m able to access the natted address from the machine (100.0.0.3) on the same subnet.


pace