Main computer ethernet adaptor eth0, ip 192.168.2.5 connected to router, ip 192.168.2.1 router connected to cable modem.
Second computer ethernet adapter#1 eth0, ip 192.168.2.10 connected to router, has access to internet. Second computers ethernet adapter#2 eth1, ip 192.168.3.1 connected to a network hub.
Two raspberry pis connected via usb->ethernet adapter to network hub. ips 192.168.3.20 & 192.168.3.21 everything on 192.168.3.* reaches each other.
I want to reach rpi @ 192.168.3.20 from first computer 192.168.2.5. What do I need to do on computer 1 & 2? I’m fine with using ip’s vs nameserver.