Problem connecting to localhost:3000

I am building my environment on my Mac / Yosemite

Here is my /etc/hosts file

Host Database

localhost is used to configure the loopback interface

when the system is booting. Do not change this entry.

127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost

I have installed Ruby, Ruby on Rails, mysql2, homebrew, gems (bundled),
built the newapp, run all the updates. Tried: localhost, 127.0.0.1,
ports 3000, 4000, 4040, 5000, 5050

Using Motorola 6141 modem, Belkin AC1200 router. Do I need to forward
the address of my MAC in the Router?

I don’t get it. What is the issue with connecting to the rails server?

If there is a concise answer to resolve this issue, I have not found it
yet.

Thanks,

bfulbright