{"image_url":null,"categories":[],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fryuichi1208.hateblo.jp%2Fentry%2F2020%2F03%2F25%2F215312\" title=\"\u3010Linux\u3011iptables\u3067\u306e\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u78ba\u7acb\u8981\u6c42\u3092\u7834\u68c4 - \u5730\u65b9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u5b66\u7fd2\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/ryuichi1208/","version":"1.0","provider_name":"Hatena Blog","title":"\u3010Linux\u3011iptables\u3067\u306e\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u78ba\u7acb\u8981\u6c42\u3092\u7834\u68c4","height":"190","width":"100%","blog_title":"\u5730\u65b9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u5b66\u7fd2\u65e5\u8a18","provider_url":"https://hatena.blog","author_name":"ryuichi1208","description":"iptables\u3067\u306e\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u78ba\u7acb\u8981\u6c42\u3092\u7834\u68c4 iptables\u3092\u8d77\u52d5\u3055\u305b\u3066\u304a\u3044\u3066\u4e0b\u8a18\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c $ iptables -A INPUT -p tcp -d 127.0.0.1 --dport 12345 -j DROP # firewalld\u3092\u4f7f\u3046\u306a\u3089\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058(\u672a\u691c\u8a3c) $ firewall-cmd --direct --add-rule ipv4 filter OUTPUT 1 -p tcp --dport 11111 -j DROP telnet\u306a\u308a\u3067port\u3078\u63a5\u7d9a\u3092\u8a66\u307f\u308b\u3068\u7e4b\u3054\u3046\u3068\u3057\u3066os\u306e\u8a2d\u5b9a\u5024\u3067\u3042\u308btimeout\u307e\u3067\u30ea\u30c8\u30e9\u30a4\u3092\u7e70\u308a\u8fd4\u3059 $ telnet 127.0.0.\u2026","url":"https://ryuichi1208.hateblo.jp/entry/2020/03/25/215312","type":"rich","blog_url":"https://ryuichi1208.hateblo.jp/","published":"2020-03-25 21:53:12"}