Find the Gateway on your network.
First you will need to find the Gateway’s address on your network. If you look on the bottom of the Gateway you will find a name plate on the bottom. Here you will see the Gateway’s MAC address. This one ends with C3C2. On a computer’s browser on the same network as the gateway try entering ncd-XXXX.local where XXXX is the last 4 digits of the MAC address. In my case it would be ncd-c3c2.local. This should bring up the Gateway’s Admin page.
You will be prompted to login. The default username is ncdio, the default password is ncdB3ast. Now you will see the admin interface for the Gateway.
Once signed in click Network on the left nav, then Firewall under that. In the screen that appears click the Edit button to the right of ETH0_CLIENT.
Scroll down to the Access Control Settings section, then click the switch for Enable SSH Access so the ON is grey, then click the Submit button
Finally to make this setting permanent click the Check button at the top of the page.
Now you should have SSH access. For SSH access the default username is ncdio and the default password is ncdB3ast.