{"url":"https://watarin.hatenadiary.org/entry/20070719/1184819881","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwatarin.hatenadiary.org%2Fentry%2F20070719%2F1184819881\" title=\"iptables\u3067PING\u4ed6\u3001\u4e0d\u8981\u306aICMP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u62d2\u5426 - \u308f\u305f\u308a\u3093\u306e\u96d1\u8a18\u3068\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2007-07-19 13:38:01","blog_url":"https://watarin.hatenadiary.org/","version":"1.0","provider_url":"https://hatena.blog","title":"iptables\u3067PING\u4ed6\u3001\u4e0d\u8981\u306aICMP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u62d2\u5426","image_url":null,"categories":["Linux"],"height":"190","width":"100%","blog_title":"\u308f\u305f\u308a\u3093\u306e\u96d1\u8a18\u3068\u30e1\u30e2","provider_name":"Hatena Blog","author_name":"watarin","author_url":"https://blog.hatena.ne.jp/watarin/","description":"iptables\u3092\u4f7f\u3063\u3066PING\u306a\u3069\u3092\u62d2\u5426\u3059\u308b\u65b9\u6cd5 http://d.hatena.ne.jp/watarin/20070507/1178534020 \u3067PING\u3092DROP \u3092\u66f8\u3044\u305f\u3051\u3069PING(echo request)\u4ee5\u5916\u306b\u3082\u30b5\u30fc\u30d0\u306e\u691c\u51fa\u306b\u4f7f\u308f\u308c\u308b\u3082\u306e\u304c\u3042\u308b\u306e\u3067 \u5fc5\u8981\u306a\u3082\u306e\u306e\u307f\u901a\u3059\u3063\u3066\u3044\u3046\u65b9\u91dd\u306b\u5909\u3048\u3066\u4e0b\u8a18\u306e\u901a\u308a A INPUT -p icmp --icmp-type echo-reply -j ACCEPT A INPUT -p icmp --icmp-type destination-unreachable -j ACCEPT A INPUT -p icmp --icmp-type so\u2026"}