Activate IP forwarding

site.pp

  # Activate ip forwarding
  exec { '/sbin/sysctl -w net.ipv4.ip_forward=1':
    unless  => "/sbin/sysctl net.ipv4.ip_forward | /bin/grep -q ' = 1$'",
  }
  exec { "persist ip forwarding":
    command => "/bin/echo 'net.ipv4.ip_forward=1' > /etc/sysctl.conf",
    unless  => "/bin/grep -q '^net.ipv4.ip_forward=1$' /etc/sysctl.conf",
  }