tee problem

#!/usr/bin/env ruby
# https://rubygems.org/gems/net-ping/versions/1.7.7
# https://github.com/chernesk/net-ping/blob/master/doc/ping.txt

require 'net/ping'

UP = true
DOWN = false

def _ping(p)
  if p.ping
    return true
  else
    return false
  end
end

start_time = Time.now.to_s

_ping_comcast_gateway = Net::Ping::External.new('10.0.0.1')
_ping_secondpets = Net::Ping::HTTP.new('10.0.17.1')

if _ping(_ping_comcast_gateway)
  _comcast_gateway_status = UP
  print start_time + " comcast gateway up\n"
else
  _comcast_gateway_status = DOWN
  print start_time + " comcast gateway down\n"
end

if _ping(_ping_secondpets)
  _secondpets_status = UP
  print start_time + " secondpets up\n"
else
  _secondpets_status = DOWN
  print start_time + " secondpets down\n"
end

while true do
  sleep 60
  test_time = Time.now.to_s

  _status = _ping(_ping_comcast_gateway)
  if _status != _comcast_gateway_status
    print test_time + " comcast gateway down\n"
  else
    print test_time + " comcast gateway up\n"
  end
  _comcast_gateway_status = _status

  _status = _ping(_ping_secondpets)
  if _status != _secondpets_status
    if _secondpets_status == UP
      print test_time + " secondpets down\n"
    else
      print test_time + " secondpets up\n"
    end
    _secondpets_status = _status
  end
end

$ ./net_status.rb | tee net.status.log 
does not work with this program