I have a similar situation to here:
But i am using a Cisco 1841 with subinterfaces instead (NAT on a stick).
From the internet i can access services on public IP being hosted in LAN2. But when i try to access the same services on the same public IPs but sitting on LAN1, it does not work.
I would reply to you but there is already a great discussion on the same topic here, so please follow it up and if you have any questions then let me know
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