If you're on a mac make sure to edit your /etc/hosts
file.
Find the IP address per instructions above and add the following line to that file
172.x.xx.x.x outer
After that, the steps above worked: navigate to the right page in my iphone browser, visit http://172.x.xx.x.x:port http://www.imore.com/how-edit-your-macs-hosts-file-and-why-you-would-want