|I'm going to need to have you describe how everything is connected. |
Since that's a USB modem that looks like a memory key, I'm guessing you plug it into your laptop, then plug the wired connection of the laptop into a LAN port on the router.
Is this correct?
Above you said, "The USB Modem uses a subnet assigned by the ISP, now, when I share that internet connection, it gives the LAN card an IP of 192.168.137.1 and a subnet of 255.255.255.0"
If I'm correct in how things physically connect, then you should be able to assign the router an IP in that subnet. I know you said it errored out when you tried but I'm thinking maybe you tried to plug in to the WAN port on the router. If so, that could be the problem. I want you to go from the computer into a LAN port on the router and will therefore need to assign an IP also to the LAN side.
So for example, on the LAN side of the router you would give it the following TCP/IP information:
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.137.1 (IP of your laptop)
Then you'd want to configure DHCP for other clients connecting to the router.
I'd use the following settings:
Scope: 192.168.138.100 to 192.168.137.199
If that DNS doesn't work, use the ones provided by your ISP (18.104.22.168
Give that a try and see if it doesn't work properly.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.