The IP should be displayed on lcd on the front of the miner.
Enter the ip address in your browser.
This should bring up the web interface.

Change the network information and click the green button.
Change the pool information and click the red button.
I had to clicked the buttons a couple of times to get it to take.
I would not trust any pre-installed software. decoding compiled code could yield the discovery that every 1 out of 100th has went to some strange stratum you did not enter.... hmmmm.
it's why I'd run an ip sniffer in front of it or just a firewall that only permits connections to know sources. I found a bunch of odd connections even on my gridseeds that I blocked.
Can you connect The ethernet cable right into a laptop? Then run a wifi off it from your laptop (Windows 8.1 Ultrabook)? The problem is I have verizon wireless modem. Those things are crappy and garbage. I was wondering if the miner can run wifi as hotspot. If I buy wireless hub.Thanks