Socket programming in Ruby

Ruby
1

What are the requirements for the IP address passed to TCPSocket.new?
Example…

require ‘socket’
=> true

s = TCPSocket.new ‘127.0.0.1’, 6500
Errno::ECONNREFUSED: Connection refused - connect(2)
from (irb):2:in initialize' from (irb):2:innew’
from (irb):2

In other words, what relationship does the machine on which the Ruby
code is being run have with the IP address referenced in the code?

2

Never mind – turns out you have to create a TCPServer first.