{"id":18360,"date":"2026-03-13T11:51:50","date_gmt":"2026-03-13T10:51:50","guid":{"rendered":"https:\/\/webhosting.de\/server-firewall-konfigurationen-hosting-sicherheitsboost\/"},"modified":"2026-03-13T11:51:50","modified_gmt":"2026-03-13T10:51:50","slug":"%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%83%95%e3%82%a1%e3%82%a4%e3%82%a2%e3%82%a6%e3%82%a9%e3%83%bc%e3%83%ab%e8%a8%ad%e5%ae%9a%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%82%bb%e3%82%ad","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/server-firewall-konfigurationen-hosting-sicherheitsboost\/","title":{"rendered":"\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u904b\u7528\u306b\u304a\u3051\u308b\u30b5\u30fc\u30d0\u30fc\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u8a2d\u5b9a\uff1a\u7a76\u6975\u306e\u30ac\u30a4\u30c9"},"content":{"rendered":"<p><strong>\u30b5\u30fc\u30d0\u30fc\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/strong>-\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306e\u8a2d\u5b9a\u306b\u3064\u3044\u3066\u3001\u69cb\u9020\u7684\u306a\u6c7a\u5b9a\u3092\u4e0b\u3057\u307e\u3059\uff1a\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u62d2\u5426\u3001\u660e\u78ba\u306b\u5b9a\u7fa9\u3055\u308c\u305f\u30b5\u30fc\u30d3\u30b9\u3001\u30ed\u30ae\u30f3\u30b0\u3001\u5178\u578b\u7684\u306a\u653b\u6483\u306b\u5bfe\u3059\u308b\u5b89\u5168\u306a\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3001\u7ba1\u7406\u8005\u30a2\u30af\u30bb\u30b9\u306e\u76e3\u8996\u3002UFW\u3001iptables\u3001WAF\u3001DDoS\u5bfe\u7b56\u306b\u3088\u308a\u3001\u30de\u30eb\u30c1\u30ec\u30d9\u30eb\u306e\u4fdd\u8b77\u3092\u8a2d\u5b9a\u3057\u3001\u4e0d\u8981\u306a\u30dd\u30fc\u30c8\u3092\u9589\u3058\u3001\u7591\u308f\u3057\u3044\u30d1\u30bf\u30fc\u30f3\u306b\u8fc5\u901f\u306b\u5bfe\u5fdc\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n<p>\u4ee5\u4e0b\u306e\u91cd\u8981\u306a\u8a18\u8ff0\u306f\u3001\u5b89\u5168\u3067\u4fdd\u5b88\u53ef\u80fd\u306a\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u6c7a\u5b9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3063\u3066\u3044\u308b\u3002.<\/p>\n<ul>\n  <li><strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u62d2\u5426<\/strong> \u57fa\u672c\u30eb\u30fc\u30eb\u3068\u3057\u3066<\/li>\n  <li><strong>\u4e16\u754c\u52b4\u9023<\/strong> \u30b7\u30f3\u30d7\u30eb\u306a\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u306e\u5834\u5408<\/li>\n  <li><strong>IP\u30c6\u30fc\u30d6\u30eb<\/strong> \u5fae\u8abf\u6574\u7528<\/li>\n  <li><strong>\u30ed\u30ae\u30f3\u30b0<\/strong> \u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/li>\n  <li><strong>\u30ef\u30d5<\/strong> \u30d7\u30e9\u30b9\u30ec\u30fc\u30c8\u5236\u9650<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/03\/server-firewall-guide-1874.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u696d\u52d9\u3067\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u304c\u9055\u3044\u3092\u751f\u3080\u7406\u7531<\/h2>\n<p>\u512a\u5148\u9806\u4f4d\u3092\u3064\u3051\u308b <strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u62d2\u5426<\/strong>-\u306a\u305c\u306a\u3089\u3001\u65b0\u3057\u3044\u30b5\u30fc\u30d3\u30b9\u306f\u3001\u79c1\u304c\u7279\u5225\u306b\u30ea\u30ea\u30fc\u30b9\u3057\u3001\u30c6\u30b9\u30c8\u3057\u305f\u3068\u304d\u306b\u306e\u307f\u898b\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u304b\u3089\u3060\u3002\u5171\u6709\u30db\u30b9\u30c8\u3084\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u30fb\u30db\u30b9\u30c8\u3067\u306f\u3001\u660e\u78ba\u306a\u30eb\u30fc\u30eb\u3067\u653b\u6483\u5bfe\u8c61\u9818\u57df\u3092\u6e1b\u3089\u3057\u3001\u6a2a\u65ad\u7684\u306a\u30b5\u30fc\u30d3\u30b9\u3092\u4fdd\u8b77\u3057\u3001\u4fb5\u5bb3\u5f8c\u306e\u6a2a\u306e\u52d5\u304d\u3092\u6291\u3048\u307e\u3059\u3002\u9001\u53d7\u4fe1\u63a5\u7d9a\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u3001\u65e2\u77e5\u306e\u30dd\u30fc\u30c8\u3092\u5236\u5fa1\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304b\u3089\u5371\u967a\u306a\u7ba1\u7406\u30b5\u30fc\u30d3\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3057\u307e\u3059\u3002XSS\u3084SQLi\u306b\u5bfe\u3059\u308b\u30db\u30b9\u30c8\u30d9\u30fc\u30b9\u306e\u30eb\u30fc\u30eb\u3092 <strong>\u30ef\u30d5<\/strong>, \u3053\u308c\u306f\u3001HTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u5206\u6790\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u30a2\u30af\u30c6\u30a3\u30d6\u30fb\u30ed\u30ae\u30f3\u30b0\u306b\u3088\u3063\u3066\u3001\u79c1\u306f\u9038\u8131\u3092\u8a8d\u8b58\u3057\u3001\u76e3\u67fb\u306b\u304a\u3051\u308b\u5909\u5316\u3092\u8a3c\u660e\u3057\u3001\u30d6\u30eb\u30fc\u30c8\u30d5\u30a9\u30fc\u30b9\u3001\u30dd\u30fc\u30c8\u30b9\u30ad\u30e3\u30f3\u3001DDoS\u3092\u793a\u3059\u30d1\u30bf\u30fc\u30f3\u306b\u3088\u308a\u8fc5\u901f\u306b\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n<h2>iptables\u3068UFW\u306e\u6bd4\u8f03\uff1a\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306e\u9078\u629e<\/h2>\n<p>\u306e\u3069\u3061\u3089\u304b\u306b\u6c7a\u3081\u308b\u3002 <strong>IP\u30c6\u30fc\u30d6\u30eb<\/strong> \u3068 UFW \u3092\u3001\u30c1\u30fc\u30e0\u306e\u5c02\u9580\u77e5\u8b58\u3001\u5909\u66f4\u983b\u5ea6\u3001\u30e9\u30f3\u30c9\u30b9\u30b1\u30fc\u30d7\u306e\u898f\u6a21\u306b\u5fdc\u3058\u3066\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002UFW\u306f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3092\u7c21\u7d20\u5316\u3057\u3001\u30bf\u30a4\u30d7\u30df\u30b9\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001SSH\u3001HTTP\u3001HTTPS\u306e\u5b9a\u671f\u7684\u306a\u30ea\u30ea\u30fc\u30b9\u3092\u5bb9\u6613\u306b\u3057\u307e\u3059\u3002Iptables\u306f\u3001\u6642\u9593\u30d9\u30fc\u30b9\u306e\u30eb\u30fc\u30eb\u3001\u30a2\u30c9\u30ec\u30b9\u30d9\u30fc\u30b9\u306e\u4f8b\u5916\u3001\u304d\u3081\u7d30\u304b\u306a\u30ec\u30fc\u30c8\u5236\u9650\u306a\u3069\u3001\u304d\u3081\u7d30\u304b\u306a\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3092\u63d0\u4f9b\u3057\u3066\u304f\u308c\u308b\u3002\u5c0f\u898f\u6a21\u304b\u3089\u4e2d\u898f\u6a21\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3067\u306f\u3001UFW\u3092\u30bb\u30ad\u30e5\u30a2\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u4f7f\u7528\u3057\u3001Fail2ban\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3002\u5927\u898f\u6a21\u306a\u74b0\u5883\u3067\u306f\u3001\u5c02\u7528\u306eiptables\u30c1\u30a7\u30fc\u30f3\u3001\u4e00\u8cab\u3057\u305f\u547d\u540d\u898f\u5247\u3001\u81ea\u52d5\u5316\u3055\u308c\u305f\u30c6\u30b9\u30c8\u304c\u5f79\u306b\u7acb\u3061\u307e\u3059\u3002 <strong>\u4fee\u6b63<\/strong>.<\/p>\n<table>\n  <thead>\n    <tr>\n      <th>\u7279\u5fb4<\/th>\n      <th>IP\u30c6\u30fc\u30d6\u30eb<\/th>\n      <th>\u4e16\u754c\u52b4\u9023<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u64cd\u4f5c<\/td>\n      <td>CLI\u4e2d\u5fc3\u3067\u8a73\u7d30\u304c\u8c4a\u5bcc<\/td>\n      <td>\u30b7\u30f3\u30d7\u30eb\u3067\u660e\u78ba\u306a\u30b3\u30de\u30f3\u30c9<\/td>\n    <\/tr>\n    <tr>\n      <td>\u67d4\u8edf\u6027<\/td>\n      <td>\u6700\u5927\u9650\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb<\/td>\n      <td>\u6a19\u6e96\u7684\u306a\u30b1\u30fc\u30b9\u3067\u306f\u5341\u5206<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u6642\u9593<\/td>\n      <td>\u30eb\u30fc\u30eb\u306b\u3088\u308b\u3002<\/td>\n      <td>\u5206<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30a8\u30e9\u30fc\u306e\u30ea\u30b9\u30af<\/td>\n      <td>\u6025\u304c\u3070\u56de\u308c<\/td>\n      <td>\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u306e\u304a\u304b\u3052<\/td>\n    <\/tr>\n    <tr>\n      <td>\u4ee3\u8868\u7684\u306a\u4f7f\u7528\u4f8b<\/td>\n      <td>\u5927\u578b\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3001\u30d5\u30a1\u30a4\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb<\/td>\n      <td>\u6bce\u65e5 <strong>\u7ba1\u7406<\/strong><\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/03\/server_firewall_guide9450.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u8a2d\u8a08\u306b\u304a\u3051\u308bIPv6<\/h2>\n<p>\u79c1\u306f\u5e38\u306b\u30c7\u30e5\u30a2\u30eb\u30b9\u30bf\u30c3\u30af\u3092\u8a08\u753b\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u30a2\u30a4\u30d4\u30fc\u30d6\u30a4\u30b7\u30c3\u30af\u30b9<\/strong> \u3092\u5c4a\u3051\u308b\u3002\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u306f\u3001v6\u3092\u30aa\u30fc\u30d7\u30f3\u306b\u3057\u305f\u307e\u307ev4\u3060\u3051\u3092\u56fa\u3081\u308b\u3053\u3068\u3060\u3002\u79c1\u306f\u4e00\u8cab\u3057\u3066UFW\u3067IPv6\u3092\u6709\u52b9\u5316\u3057\u3001\u3055\u3089\u306b\u6b21\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u3002 <em>\u30c7\u30d5\u30a9\u30eb\u30c8\u62d2\u5426<\/em>. .\u79c1\u306f\u7279\u306bICMPv6\u3092\u6271\u3046\uff1a\u30eb\u30fc\u30bf\u30fc\u3068\u8fd1\u96a3\u63a2\u7d22\u306fv6\u306b\u3068\u3063\u3066\u521d\u6b69\u7684\u306a\u3053\u3068\u3067\u3042\u308a\u3001\u30d6\u30e9\u30f3\u30b1\u30c3\u30c8\u30d6\u30ed\u30c3\u30af\u306f\u63a5\u7d9a\u6027\u3092\u58ca\u3059\u3002\u5fc5\u8981\u306aICMPv6\u30bf\u30a4\u30d7\u306f\u9650\u5b9a\u7684\u306b\u8a31\u53ef\u3057\u3001\u7570\u5e38\u306f\u30ed\u30b0\u306b\u6b8b\u3057\u3001\u60aa\u7528\u30d1\u30bf\u30fc\u30f3\u306e\u307f\u3092\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u308b\u3002\u307e\u305f\u3001DNS\u306e\u30a8\u30f3\u30c8\u30ea\uff08AAAA\uff09\u3082\u30c1\u30a7\u30c3\u30af\u3057\u3001\u610f\u56f3\u305b\u305av6\u7d4c\u7531\u3067\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u30b5\u30fc\u30d3\u30b9\u304c\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002v6\u3092\u4f7f\u7528\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u5185\u3067\u304d\u308c\u3044\u306b\u7121\u52b9\u5316\u3057\u3001\u305d\u306e\u6c7a\u5b9a\u3092\u6587\u66f8\u5316\u3057\u307e\u3059\u3002\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u3001v6\u3092v4\u3068\u540c\u3058\u539f\u5247\u3092\u6301\u3064\u5bfe\u7b49\u306a\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u5206\u5c90\u3068\u307f\u306a\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>\u30b9\u30c6\u30fc\u30c8\u30d5\u30eb\u30fb\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3001\u30b3\u30f3\u30f3\u30c8\u30e9\u30c3\u30af\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/h2>\n<p>\u79c1\u306f\u3053\u3046\u3057\u3066\u3044\u308b\u3002 <strong>\u30b9\u30c6\u30fc\u30c8\u30d5\u30eb<\/strong>-Conntrack\u306b\u3088\u308b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\uff1a\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u6301\u3064\u30d1\u30c3\u30b1\u30fc\u30b8 <em>\u8a2d\u7acb<\/em>\/<em>\u95a2\u9023\u8a18\u4e8b<\/em> \u30eb\u30fc\u30eb\u306e\u65e9\u3044\u6bb5\u968e\u3067\u767a\u751f\u3059\u308b\u305f\u3081\u3001\u8ca0\u8377\u304c\u8efd\u6e1b\u3055\u308c\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u53d7\u3051\u5165\u308c\u305f\u30d5\u30ed\u30fc\u306b\u512a\u5148\u9806\u4f4d\u3092\u3064\u3051\u3001\u6df1\u3044\u30c1\u30a7\u30c3\u30af\u3092\u7701\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u308c\u306f\u3001\u9ad8\u4fa1\u306a\u30c1\u30a7\u30c3\u30af\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001\u660e\u3089\u304b\u306a\u30ce\u30a4\u30ba\uff08\u4f8b\u3048\u3070\u7121\u52b9\u306a\u30d1\u30b1\u30c3\u30c8\uff09\u306b\u5bfe\u3059\u308b\u30c9\u30ed\u30c3\u30d7\u30eb\u30fc\u30eb\u306b\u3059\u3050\u306b\u7d9a\u304f\u3002\u5e83\u7bc4\u306aIP\u30ea\u30b9\u30c8\u306b\u5bfe\u3057\u3066\u306f <em>\u30a4\u30d7\u30bb\u30c3\u30c8<\/em> 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<code>*\u30ea\u30b9\u30c8\u30a2<\/code>-\u30b3\u30de\u30f3\u30c9\u306e\u77db\u76fe\u3092\u907f\u3051\u308b\u305f\u3081\u3067\u3042\u308b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/03\/server-firewall-hosting-guide-7462.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30b9\u30c6\u30c3\u30d7\u30fb\u30d0\u30a4\u30fb\u30b9\u30c6\u30c3\u30d7\u3067UFW\u3092\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3059\u308b<\/h2>\n<p>\u79c1\u306fUFW\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3001\u307e\u305aSSH\u3092\u6709\u52b9\u306b\u3057\u3066\u304b\u3089\u3001\u30ed\u30c3\u30af\u30a2\u30a6\u30c8\u304c\u306a\u3044\u3088\u3046\u306b\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u30a6\u30a7\u30d6\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306e\u5834\u5408\u306f\u3001\u30dd\u30fc\u30c880\u3068443\u3092\u958b\u304d\u3001SSH\u306e\u8ffd\u52a0\u5236\u9650\u3092\u8a2d\u5b9a\u3057\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u30bd\u30fc\u30b9IP\u7d4c\u7531\u306e\u7ba1\u7406\u8005\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3057\u3066\u3044\u307e\u3059\u3002\u5185\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3084\u30c8\u30f3\u30cd\u30eb\u7d4c\u7531\u306e\u30a2\u30af\u30bb\u30b9\u306e\u65b9\u304c\u5b89\u5168\u306a\u306e\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304b\u3089\u306e3306\u30845432\u306a\u3069\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30dd\u30fc\u30c8\u306f\u30d6\u30ed\u30c3\u30af\u3057\u3066\u3044\u307e\u3059\u3002\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u304c\u7d42\u308f\u3063\u305f\u3089\u3001\u30eb\u30fc\u30eb\u3068\u30ed\u30b0\u30ec\u30d9\u30eb\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001nmap\u3067\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u304b\u3069\u3046\u304b\u30c6\u30b9\u30c8\u3057\u3066\u3001\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u30bb\u30ad\u30e5\u30a2\u306b\u3057\u307e\u3059\u3002\u7e70\u308a\u8fd4\u3057\u767a\u751f\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u306b\u306f <a href=\"https:\/\/webhosting.de\/ja\/%e3%83%95%e3%82%a1%e3%82%a4%e3%82%a2%e3%82%a6%e3%82%a9%e3%83%bc%e3%83%ab-%e3%83%ab%e3%83%bc%e3%83%ab-%e3%82%a6%e3%82%a7%e3%83%96%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc-iptables-ufw-%e5%ae%9f%e8%b7%b5\/\">\u5b9f\u8df5\u7684\u306a\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u30eb\u30fc\u30eb<\/a>, 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<strong>\u30ed\u30ae\u30f3\u30b0<\/strong> 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<em>\u30c9\u30e9\u30a4\u30fb\u30e9\u30f3<\/em> 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class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/03\/server_firewall_guide_6983.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<p>\u672c\u5f53\u306b\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u3060\u3051\u3092\u958b\u304d\u3001ss 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class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/03\/server_firewall_guide_2938.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\uff1anftables\u3001\u540d\u524d\u7a7a\u9593\u3001WAF<\/h2>\n<p>\u79c1\u306f\u4e2d\u671f\u7684\u306b\u6b21\u306e\u3088\u3046\u306a\u8a08\u753b\u3092\u7acb\u3066\u3066\u3044\u308b\u3002 <strong>\u30a8\u30cc\u30a8\u30d5\u30c6\u30a3\u30fc\u30d6\u30eb\u30ba<\/strong> 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<strong>\u56de\u7b54<\/strong>.<\/p>\n\n<h2>Docker\u3001Kubernetes\u3001\u30af\u30e9\u30a6\u30c9\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/h2>\n<p>\u79c1\u306f\u3001\u30db\u30b9\u30c8\u30d9\u30fc\u30b9\u306e\u30eb\u30fc\u30eb\u3068\u30aa\u30fc\u30b1\u30b9\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u30dd\u30ea\u30b7\u30fc\u3092\u8abf\u6574\u3057\u3001\u52b9\u679c\u304c\u4e92\u3044\u306b\u77db\u76fe\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002Kubernetes\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30dd\u30ea\u30b7\u30fc\u306f\u5fc5\u8981\u6700\u4f4e\u9650\u306e\u3082\u306e\u306b\u9650\u5b9a\u3057\u3001\u30dd\u30c3\u30c9\u306e\u767a\u4fe1\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306f\u72ed\u304f\u3057\u3066\u3044\u308b\u3002Docker\u74b0\u5883\u3067\u306f\u3001NAT\u3068FORWARD\u30c1\u30a7\u30fc\u30f3\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001iptables\u306e\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u30c7\u30d5\u30a9\u30eb\u30c8\u3092\u4fee\u6b63\u3057\u3001\u30b3\u30f3\u30c6\u30ca\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u610f\u5473\u306e\u3042\u308b\u3068\u3053\u308d\u3060\u3051\u8a71\u3059\u3053\u3068\u3092\u8a31\u53ef\u3059\u308b\u3002\u30af\u30e9\u30a6\u30c9\u30fb\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u4e0a\u6d41\u3067\u4f7f\u3044\u3001\u653b\u6483\u304c\u30db\u30b9\u30c8\u306b\u5230\u9054\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3001\u5e2f\u57df\u5e45\u3092\u4e8b\u524d\u306b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u3002\u76e3\u67fb\u306b\u3064\u3044\u3066\u306f\u3001\u5404\u30ec\u30d9\u30eb\u9593\u306e\u76f8\u4e92\u4f5c\u7528\u3092\u6587\u66f8\u5316\u3057\u3001\u8cac\u4efb\u3092\u5272\u308a\u5f53\u3066\u3001\u5909\u66f4\u3092\u6bb5\u968e\u7684\u306b <strong>\u30b9\u30c6\u30fc\u30b8<\/strong>.<\/p>\n\n<h2>sysctl\u306b\u3088\u308b\u30ab\u30fc\u30cd\u30eb\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30cf\u30fc\u30c9\u30cb\u30f3\u30b0<\/h2>\n<p>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306b\u30ab\u30fc\u30cd\u30eb\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3092\u8ffd\u52a0\u3057\u3001\u653b\u6483\u30d9\u30af\u30c8\u30eb\u3092\u3055\u3089\u306b\u9589\u3058\u3066\u30ea\u30bd\u30fc\u30b9\u3092\u4fdd\u8b77\u3059\u308b\u3002\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30bf\u30b9\u30af\u306e\u306a\u3044\u30b5\u30fc\u30d0\u30fc\u3067\u306fIP\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u7121\u52b9\u306b\u3057\u3001IP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u306b\u5bfe\u3057\u3066\u306f\u30ea\u30d0\u30fc\u30b9\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u30fc\u3092\u6709\u52b9\u306b\u3057\u3001SYN\/ICMP\u95a2\u9023\u306e\u5236\u9650\u3092\u9632\u5fa1\u7684\u306b\u8a2d\u5b9a\u3059\u308b\u3002IPv6\u306b\u3064\u3044\u3066\u306f\u3001\u30eb\u30fc\u30bf\u30fc\u3068\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8003\u616e\u3057\u3001\u300c\u30de\u30fc\u30c6\u30a3\u30a2\u30f3\u300d\u306e\u30ed\u30b0\u3092\u614e\u91cd\u306b\u53d6\u3063\u3066\u3001\u4f7f\u3048\u308b\u304c\u904e\u5bc6\u306a\u30c7\u30fc\u30bf\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002\u3053\u308c\u3089\u306f\u3001\u79c1\u304c\u5f79\u5272\u306b\u5fdc\u3058\u3066\u5fae\u8abf\u6574\u3057\u3066\u3044\u308b\u8abf\u6574\u306e\u4e00\u4f8b\u3067\u3059\uff1a<\/p>\n<ul>\n  <li>net.ipv4.ip_forward=0\u3001net.ipv6.conf.all.forwarding=0<\/li>\n  <li>net.ipv4.conf.all.rp_filter=1 (\u975e\u5bfe\u79f0\u6027\u306b\u3088\u3063\u3066\u306f2)<\/li>\n  <li>net.ipv4.tcp_syncookies=1\u3001net.ipv4.tcp_max_syn_backlog\u304c\u5897\u52a0\u3057\u305f\u3002<\/li>\n  <li>net.ipv4.conf.all.accept_redirects=0, send_redirects=0<\/li>\n  <li>net.ipv6.conf.all.accept_ra=0\uff08\u30b5\u30fc\u30d0\u30fc\uff09\u3001accept_redirects=0<\/li>\n  <li>net.ipv4.icmp_echo_ignore_broadcasts=1, icmp_ratelimit \u9069\u5ea6<\/li>\n  <li>net.ipv4.conf.all.log_martians=1 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