I have a network with IP addresses in the range of 192.168.100 and 192.168.130 on two singular network cards on the same machine on the local network. Port 4 on the firewall is plugged into another device with the .130 range IP. Port 1 on the firewall is plugged into the local network. I can’t contact the other device from the machine.
Any idea how I can achieve this?
I think your enviroment like this;
Have a nice and healty day.
If i read your issue correctly you have:
a desktop computer with 2 network cards plugged in, one in range 192.168.100 and one in 192.168.130
your firewall also has 2 connected interfaces, one in 192.168.100 and one in 192.168.130
your desktop is connected with both interfaces in the same broadcast domain to the firewall on the interface with ip 192.168.100
the firewall is connected to a different broadcast domain on the 192.168.130 interface
i don't think there is a (layer3) solution to this issue as your host will always prefer the locally connected subnet over a remotely routed one so it will look for ARP rather than route
you could consider switching your firewall to two layer2 interfaces, and setting up routed vlan interfaces in each subnet
that way both broadcast domains will see eachother and a default gateway will remain available for routing
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