なるほどNATをゲートウェイを使うのか
dev.classmethod.jp
https://qiita.com/miriwo/items/e9084359d4b75b6bffb2
pythonのsubprocessでpingを飛ばす方法
https://qiita.com/MashCannu/items/4dfaf09d15919eb33402
https://plantprogramer.com/ping/
https://qiita.com/diaphragm/items/b87d700ef36fa62c1aa8
