By overriding DRb.here? we force DRb communication

force_loopback_drb.rb

require 'drb'
require 'drb/unix'

shared = []
DRb.start_service 'drbunix:', shared

loopback = DRb.uri

puts loopback

def DRb.here? uri
  false
end

ro = DRbObject.new nil, loopback

ro << :a

puts shared