I had to manually add routes to the network before I could connect to the internet.
I'm on a Windows machine so I used PuTTY to SSH into the Tetra.
Once SSH is connected and you're logged in, use the route command to add the route to the internet.
root@Pineapple:~# route add -net 0.0.0.0 netmask 0.0.0.0 gw ip_of_gateway_to_internet