Main router(WAN) - 192.168.1.1
client1 : 192.168.1.2
client2: 192.168.1.3
Mikrotik (WAN) - 192.168.1.100
Mikrotik (LAN) - 192.168.30.1
client1: 192.168.30.2
On mikrotik lan client, can communicate main router lan clients.
How to communicate man router client to mikrotik lan clients?