I feel like this is something that I can accomplish with a Mikrotik, but I tried for several hours today with no luck.
eth1 - WAN, static public IP
eth2 - bridged to bridge1
eth3 - bridged to bridge1
eth4 - bridged to bridge1
eth5 - 192.168.31.250/24 (a different router is the gateway for this subnet/network) <-- I need access to this subnet from 192.168.1.0/24
bridge1 - 192.168.1.1/24 (DHCP enabled)
From any port on bridge1, I can access 192.168.31.250, but nothing else on that subnet.
I tried many firewall filters, various NATting, mangle rules... help!