{"id":1454,"date":"2026-10-26T13:00:00","date_gmt":"2026-10-26T04:00:00","guid":{"rendered":"https:\/\/quantumsea.net\/?p=1454"},"modified":"2026-10-23T13:19:26","modified_gmt":"2026-10-23T04:19:26","slug":"qs-dns-serial-wraparound-20261023","status":"publish","type":"post","link":"https:\/\/quantumsea.net\/?p=1454","title":{"rendered":"DNS\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3001\u6570\u5b57\u304c\u5c0f\u3055\u304f\u3066\u3082\u65b0\u3057\u3044\u7248\u306b\u306a\u308b\u7406\u7531"},"content":{"rendered":"<p>DNS\u306e\u8a2d\u5b9a\u3092\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u3067\u305d\u308d\u3048\u308b\u3068\u304d\u3001\u300c\u3069\u3061\u3089\u304c\u65b0\u3057\u3044\u7248\u304b\u300d\u3092\u8868\u3059\u306e\u304cSOA\u30ec\u30b3\u30fc\u30c9\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3067\u3059\u3002\u3068\u3053\u308d\u304c\u3001\u6570\u5b57\u3068\u3057\u3066\u5c0f\u3055\u3044\u756a\u53f7\u304c\u65b0\u3057\u3044\u7248\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u756a\u53f7\u3092\u5165\u308c\u308b\u5834\u6240\u306e\u5927\u304d\u3055\u304c\u6709\u9650\u3067\u3001\u4e0a\u9650\u306e\u6b21\u306b\u5148\u982d\u3078\u623b\u308b\u305f\u3081\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u3053\u306e\u6298\u308a\u8fd4\u3057\u3092\u6271\u3046<strong>Serial Number Arithmetic\uff08\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u6f14\u7b97\uff09<\/strong>\u3092\u3001\u5c0f\u3055\u306a\u6570\u306e\u4f8b\u3067\u78ba\u304b\u3081\u307e\u3059\u3002<\/p>\n<section class=\"influvetor-quick-summary\" aria-label=\"\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\uff1f\">\n<p><strong>\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\uff1f<\/strong><\/p>\n<ul>\n<li>DNS\u306eSOA\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u306f32\u30d3\u30c3\u30c8\u3002\u901a\u5e38\u306e\u6574\u6570\u306e\u5927\u5c0f\u3060\u3051\u3067\u306f\u3001\u6298\u308a\u8fd4\u3057\u5f8c\u306e\u65b0\u65e7\u3092\u5224\u5b9a\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<li>\u524d\u5411\u304d\u306e\u5dee\u304c\u756a\u53f7\u7a7a\u9593\u306e\u534a\u5206\u672a\u6e80\u306a\u3089\u65b0\u3057\u3044\u5074\u3001\u534a\u5206\u3061\u3087\u3046\u3069\u306a\u3089\u5927\u5c0f\u95a2\u4fc2\u306f\u672a\u5b9a\u7fa9\u3067\u3059\u3002<\/li>\n<li>\u5c0f\u3055\u306a\u66f4\u65b0\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3082\u3001\u9577\u304f\u53d6\u308a\u6b8b\u3055\u308c\u305f\u7248\u3068\u306e\u95a2\u4fc2\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u756a\u53f7\u306e\u6bd4\u8f03\u3068\u3001\u5404\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u53cd\u6620\u78ba\u8a8d\u3092\u5206\u3051\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/section>\n<h2>SOA\u306e\u756a\u53f7\u306f\u3001\u8a2d\u5b9a\u306e\u7248\u3092\u6bd4\u3079\u308b\u305f\u3081\u306b\u3042\u308b<\/h2>\n<p>SOA\uff08Start of Authority\uff09\u306f\u3001DNS\u306e\u7ba1\u7406\u7bc4\u56f2\u3067\u3042\u308b\u30be\u30fc\u30f3\u306b\u3064\u3044\u3066\u3001\u7248\u756a\u53f7\u3084\u66f4\u65b0\u78ba\u8a8d\u306b\u95a2\u308f\u308b\u5024\u3092\u6301\u3064\u30ec\u30b3\u30fc\u30c9\u3067\u3059\u3002RFC 1035\u306eSERIAL\u6b04\u306f\u7b26\u53f7\u306a\u305732\u30d3\u30c3\u30c8\u306e\u7248\u756a\u53f7\u3067\u3001\u30be\u30fc\u30f3\u8ee2\u9001\u3067\u3082\u305d\u306e\u5024\u3092\u4fdd\u3061\u307e\u3059\u3002EXPIRE\u6b04\u306f\u3001\u30be\u30fc\u30f3\u306e\u60c5\u5831\u3092\u6a29\u5a01\u3042\u308b\u60c5\u5831\u3068\u3057\u3066\u6271\u3044\u7d9a\u3051\u3089\u308c\u308b\u671f\u9650\u306b\u95a2\u308f\u308a\u307e\u3059\u3002\u7248\u756a\u53f7\u3068\u6642\u9593\u306e\u5024\u306f\u3001\u540c\u3058SOA\u306b\u5165\u3063\u3066\u3044\u3066\u3082\u5f79\u5272\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u756a\u53f7\u304c\u4e00\u81f4\u3057\u305f\u3053\u3068\u306f\u300c\u756a\u53f7\u304c\u540c\u3058\u300d\u3068\u3044\u3046\u89b3\u6e2c\u3067\u3059\u3002\u305d\u308c\u3060\u3051\u3067\u3001\u8a2d\u5b9a\u5185\u5bb9\u306e\u8aa4\u308a\u304c\u306a\u3044\u3053\u3068\u3084\u3001\u3059\u3079\u3066\u306e\u5229\u7528\u8005\u304c\u65b0\u3057\u3044\u5fdc\u7b54\u3092\u53d7\u3051\u305f\u3053\u3068\u307e\u3067\u306f\u8a3c\u660e\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u306e\u8a18\u4e8b\u304c\u6271\u3046\u306e\u306f\u3001\u4e8c\u3064\u306e\u7248\u756a\u53f7\u3092\u6bd4\u8f03\u3059\u308b\u898f\u5247\u3067\u3059\u3002<\/p>\n<h2>16\u500b\u306e\u756a\u53f7\u3067\u3001\u6298\u308a\u8fd4\u3057\u3092\u898b\u3066\u307f\u308b<\/h2>\n<p>\u5b9f\u969b\u306eDNS\u3067\u306f0\u304b\u30894,294,967,295\u307e\u3067\u306e\u5024\u3092\u4f7f\u3044\u307e\u3059\u3002\u307e\u305a\u8aac\u660e\u7528\u306b4\u30d3\u30c3\u30c8\u3001\u3064\u307e\u308a0\u304b\u308915\u307e\u3067\u306e16\u500b\u3078\u7e2e\u3081\u307e\u3059\u3002\u3053\u308c\u306fDNS\u306e\u8a2d\u5b9a\u5024\u30924\u30d3\u30c3\u30c8\u306b\u3059\u308b\u63d0\u6848\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u65e7\u7248\u309214\u3068\u3057\u30013\u56de\u5206\u9032\u3081\u308b\u3068\u300115\u30010\u30011\u3068\u306a\u308a\u307e\u3059\u3002\u65b0\u3057\u3044\u756a\u53f7\u306f1\u3067\u3059\u304c\u3001\u666e\u901a\u306e\u6574\u6570\u6bd4\u8f03\u3067\u306f1\u306f14\u3088\u308a\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u98df\u3044\u9055\u3044\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u6bd4\u8f03\u3067\u306f\u300c\u65e7\u7248\u304b\u3089\u5019\u88dc\u3078\u3001\u6298\u308a\u8fd4\u3057\u3092\u542b\u3081\u3066\u524d\u5411\u304d\u306b\u3069\u308c\u3060\u3051\u96e2\u308c\u3066\u3044\u308b\u304b\u300d\u3092\u6c42\u3081\u307e\u3059\u3002<\/p>\n<p>\u5019\u88dc\u3092b\u3001\u65e7\u7248\u3092a\u3001\u756a\u53f7\u7a7a\u9593\u306e\u5927\u304d\u3055\u3092M\u3068\u3059\u308b\u3068\u3001\u5deed\u306f<strong>(b \u2212 a) mod M<\/strong>\u3067\u3059\u3002\u3053\u3053\u3067mod\u306f\u30010\u4ee5\u4e0aM\u672a\u6e80\u306b\u306a\u308b\u4f59\u308a\u3092\u53d6\u308b\u64cd\u4f5c\u3067\u3059\u3002\u8ca0\u6570\u306e\u4f59\u308a\u306e\u6271\u3044\u304c\u8a00\u8a9e\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u305f\u3081\u3001\u5f0f\u3092\u5b9f\u88c5\u3059\u308b\u3068\u304d\u306f\u3053\u306e\u7bc4\u56f2\u3078\u305d\u308d\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-dns-serial-wraparound-20261023-figure-d669c0b9635a.png\" alt=\"\u8aac\u660e\u75284\u30d3\u30c3\u30c8\u7a7a\u9593\u3067\u3001\u65e714\u304b\u3089\u5019\u88dc1\u3078\u306e\u524d\u5411\u304d\u5dee\u306f3\u3067\u65b0\u3057\u3044\u3002\u65e714\u304b\u3089\u5019\u88dc6\u306f\u5dee8\u3067\u5927\u5c0f\u672a\u5b9a\u7fa9\u3002\u65e714\u304b\u3089\u5019\u88dc13\u306f\u5dee15\u3067\u53e4\u3044\u3002\u5404\u5dee\u306f16\u3067\u6298\u308a\u8fd4\u3057\u3066\u8a08\u7b97\u3002\" style=\"width:100%;height:auto;max-width:720px\" \/><figcaption>\u8aac\u660e\u7528\u306e4\u30d3\u30c3\u30c8\u7a7a\u9593\u3067\u3001\u65e7\u724814\u3068\u4e09\u3064\u306e\u5019\u88dc\u3092\u6bd4\u8f03\u3057\u305f\u72ec\u81ea\u8a08\u7b97\u3002\u5b9f\u969b\u306eDNS\u306f32\u30d3\u30c3\u30c8\u3067\u3042\u308a\u3001\u3053\u306e\u56f3\u306fDNS\u30b5\u30fc\u30d0\u30fc\u306e\u5b9f\u6e2c\u7d50\u679c\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/figcaption><\/figure>\n<p>16\u500b\u306e\u756a\u53f7\u3067\u306f\u534a\u5206\u304c8\u3067\u3059\u3002\u5dee\u304c0\u306a\u3089\u540c\u3058\u30011\u304b\u30897\u306a\u3089\u5019\u88dc\u304c\u65b0\u3057\u3044\u30019\u304b\u308915\u306a\u3089\u5019\u88dc\u304c\u53e4\u3044\u3068\u5224\u5b9a\u3057\u307e\u3059\u3002\u5dee8\u3060\u3051\u306f\u3001\u3069\u3061\u3089\u3092\u5927\u304d\u3044\u3068\u3059\u308b\u304b\u304c\u898f\u5247\u3067\u6c7a\u307e\u308a\u307e\u305b\u3093\u3002RFC 1982\u306e\u6bd4\u8f03\u898f\u5247\u3092\u3001\u3053\u306e\u5c0f\u3055\u306a\u7a7a\u9593\u3078\u5f53\u3066\u306f\u3081\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306b\u306f\u3001\u65e714\u30fb\u5019\u88dc1\u306a\u3089d=3\u3067\u65b0\u3057\u3044\u5074\u3067\u3059\u3002\u65e714\u30fb\u5019\u88dc13\u306a\u3089d=15\u3067\u53e4\u3044\u5074\u3067\u3059\u3002\u65e714\u30fb\u5019\u88dc6\u306a\u3089d=8\u3068\u306a\u308a\u3001\u5927\u5c0f\u672a\u5b9a\u7fa9\u3067\u3059\u3002\u300c\u540c\u3058\u300d\u3067\u3082\u300c\u5fc5\u305a\u30a8\u30e9\u30fc\u3092\u8fd4\u3059\u300d\u3067\u3082\u3042\u308a\u307e\u305b\u3093\u3002\u7279\u5b9a\u306e\u5927\u5c0f\u7d50\u679c\u3092\u524d\u63d0\u306b\u4f7f\u308f\u306a\u3044\u5883\u754c\u3067\u3059\u3002<\/p>\n<h2>\u4e00\u56de\u305a\u3064\u6b63\u3057\u304f\u9032\u3081\u3066\u3082\u3001\u53e4\u3044\u7248\u304b\u3089\u898b\u308b\u3068\u9006\u8ee2\u3059\u308b<\/h2>\n<p>\u6b21\u306b\u30014\u30d3\u30c3\u30c8\u306e\u756a\u53f7\u30921\u21927\u219213\u3068\u9032\u3081\u307e\u3059\u3002\u3069\u3061\u3089\u306e\u4e00\u6b69\u3082\u5897\u5206\u306f6\u306a\u306e\u3067\u3001\u534a\u5468\u306e8\u672a\u6e80\u3067\u3059\u30027\u306f1\u3088\u308a\u65b0\u3057\u304f\u300113\u306f7\u3088\u308a\u65b0\u3057\u3044\u3068\u5224\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3068\u3053\u308d\u304c\u3001\u6700\u521d\u306e1\u3060\u3051\u3092\u899a\u3048\u3066\u3044\u308b\u5074\u304c13\u3092\u898b\u308b\u3068\u3001\u524d\u5411\u304d\u306e\u5dee\u306f12\u3067\u3059\u3002\u534a\u5468\u3092\u8d85\u3048\u308b\u305f\u3081\u3001\u6bd4\u8f03\u4e0a\u306f13\u304c\u53e4\u3044\u5074\u306b\u306a\u308a\u307e\u3059\u3002\u9014\u4e2d\u306e\u66f4\u65b0\u3092\u898b\u305f\u5074\u3068\u898b\u9003\u3057\u305f\u5074\u3067\u3001\u898b\u3048\u3066\u3044\u308b\u95a2\u4fc2\u304c\u7570\u306a\u308b\u306e\u3067\u3059\u3002\u5404\u4e00\u6b69\u306e\u5408\u6cd5\u6027\u3060\u3051\u3067\u306f\u3001\u9577\u304f\u6b8b\u3063\u305f\u7248\u304b\u3089\u6700\u5f8c\u306e\u7248\u3092\u6bd4\u8f03\u3067\u304d\u308b\u4fdd\u8a3c\u306b\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u306e\u4f8b\u306f\u3082\u3046\u4e00\u3064\u306e\u6ce8\u610f\u3082\u793a\u3057\u307e\u3059\u30021\u3088\u308a7\u304c\u65b0\u3057\u304f\u30017\u3088\u308a13\u304c\u65b0\u3057\u304f\u3066\u3082\u30011\u306813\u306e\u95a2\u4fc2\u307e\u3067\u666e\u901a\u306e\u6570\u76f4\u7dda\u306e\u9806\u5e8f\u3068\u3057\u3066\u3064\u306a\u3052\u3089\u308c\u307e\u305b\u3093\u3002\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3092\u3001\u4efb\u610f\u306b\u9577\u3044\u5c65\u6b74\u3092\u4e00\u5217\u306b\u4e26\u3079\u308b\u305f\u3081\u306e\u5358\u7d14\u306a\u30bd\u30fc\u30c8\u30ad\u30fc\u3068\u3057\u3066\u6271\u3046\u306e\u306f\u9069\u3057\u307e\u305b\u3093\u3002<\/p>\n<h2>32\u30d3\u30c3\u30c8\u3067\u5883\u754c\u3092\u78ba\u304b\u3081\u308b<\/h2>\n<p>DNS\u3067\u306fM=4,294,967,296\u3001\u534a\u5468\u306f2,147,483,648\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u65e74,294,967,294\u304b\u3089\u5019\u88dc1\u3078\u306e\u5dee\u306f3\u3068\u306a\u308a\u3001\u5019\u88dc\u304c\u65b0\u3057\u3044\u3068\u5224\u5b9a\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u6841\u304c\u5c0f\u3055\u304f\u306a\u3063\u305f\u304b\u3089\u5dfb\u304d\u623b\u3063\u305f\u300d\u3068\u306f\u9650\u3089\u306a\u3044\u5177\u4f53\u4f8b\u3067\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3001\u65e7100\u3068\u5019\u88dc2,147,483,748\u306e\u5dee\u306f\u534a\u5468\u3061\u3087\u3046\u3069\u3067\u3059\u3002\u5927\u5c0f\u306f\u672a\u5b9a\u7fa9\u306b\u306a\u308a\u307e\u3059\u3002\u5019\u88dc2,147,483,747\u306a\u3089\u5dee\u306f\u534a\u5468\u3088\u308a1\u5c0f\u3055\u304f\u3001\u65b0\u3057\u3044\u5074\u3067\u3059\u3002\u305f\u3063\u305f1\u306e\u9055\u3044\u3067\u3082\u5883\u754c\u306e\u610f\u5473\u304c\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n<p>RFC 1982\u306f\u3001\u4e00\u5ea6\u306b\u52a0\u3048\u3066\u3088\u3044\u5897\u5206\u30920\u304b\u30892,147,483,647\u307e\u3067\u3068\u5b9a\u3081\u3001SOA\u306eEXPIRE\u306b\u76f8\u5f53\u3059\u308b\u671f\u9593\u5185\u306e\u7d2f\u7a4d\u5897\u5206\u306b\u3082\u6ce8\u610f\u3092\u6c42\u3081\u3066\u3044\u307e\u3059\u3002\u5927\u304d\u304f\u756a\u53f7\u3092\u98db\u3070\u3057\u3066\u4fee\u6b63\u3059\u308b\u3068\u304d\u306f\u3001\u624b\u5143\u306e\u4e00\u53f0\u3068\u306e\u6bd4\u8f03\u3060\u3051\u3067\u306f\u5341\u5206\u3067\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u53cd\u6620\u3092\u8abf\u3079\u308b\u3068\u304d\u306b\u3001\u4f55\u3092\u6b8b\u3059\u304b<\/h2>\n<p>\u904b\u7528\u8a18\u9332\u306b\u306f\u3001\u65b0\u3057\u3044\u5024\u3060\u3051\u3067\u306a\u304f\u3001\u5404\u30b5\u30fc\u30d0\u30fc\u3067\u89b3\u6e2c\u3057\u305f\u65e7\u5024\u30fb\u5019\u88dc\u5024\u30fb\u89b3\u6e2c\u6642\u523b\u3092\u7d44\u306b\u3057\u3066\u6b8b\u3059\u3068\u6bd4\u8f03\u3067\u304d\u307e\u3059\u3002\u540c\u3058\u5019\u88dc\u3067\u3082\u3001\u65e7\u5024\u304c\u9055\u3048\u3070\u5dee\u304c\u5909\u308f\u308b\u305f\u3081\u3067\u3059\u3002\u524d\u306e\u4f8b\u306a\u3089\u3001\u65e7\u50247\u306e\u30b5\u30fc\u30d0\u30fc\u3068\u65e7\u50241\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u4e00\u3064\u306b\u307e\u3068\u3081\u3066\u3057\u307e\u3046\u3068\u3001\u7d50\u679c\u306e\u9055\u3044\u3092\u898b\u843d\u3068\u3057\u307e\u3059\u3002<\/p>\n<p>\u6bd4\u8f03\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u3059\u308b\u306a\u3089\u3001\u901a\u5e38\u306e\u5897\u52a0\u3060\u3051\u3067\u306a\u304f\u3001\u6298\u308a\u8fd4\u3057\u3001\u540c\u5024\u3001\u534a\u5468\u3061\u3087\u3046\u3069\u3001\u305d\u306e\u524d\u5f8c\u3092\u542b\u3081\u308b\u3068\u5883\u754c\u3092\u70b9\u691c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u8aac\u660e\u75284\u30d3\u30c3\u30c8\u306e\u5168256\u7d44\u3092\u898f\u683c\u306e\u4e0d\u7b49\u5f0f\u3068\u7167\u5408\u3057\u300132\u30d3\u30c3\u30c8\u306e\u4e0a\u8a18\u4f8b\u3082\u8a08\u7b97\u3057\u307e\u3057\u305f\u3002\u305f\u3060\u3057\u3001\u3053\u308c\u306f\u6570\u5f0f\u3068\u4f8b\u306e\u691c\u8a3c\u3067\u3059\u3002\u5229\u7528\u4e2d\u306eDNS\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3084\u5b9f\u969b\u306e\u30be\u30fc\u30f3\u8ee2\u9001\u3092\u8a66\u9a13\u3057\u305f\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u304b\u3089\u5206\u304b\u308b\u306e\u306f\u3001\u6c7a\u3081\u3089\u308c\u305f\u7bc4\u56f2\u5185\u3067\u306e\u7248\u306e\u524d\u5f8c\u95a2\u4fc2\u3067\u3059\u3002\u756a\u53f7\u306e\u6bd4\u8f03\u304c\u6210\u7acb\u3059\u308b\u3053\u3068\u3001\u5fc5\u8981\u306a\u30b5\u30fc\u30d0\u30fc\u304c\u66f4\u65b0\u3092\u53d7\u3051\u53d6\u3063\u305f\u3053\u3068\u3001\u516c\u958b\u3057\u305fDNS\u30c7\u30fc\u30bf\u304c\u610f\u56f3\u3069\u304a\u308a\u3067\u3042\u308b\u3053\u3068\u3092\u3001\u305d\u308c\u305e\u308c\u78ba\u304b\u3081\u308b\u3068\u72b6\u6cc1\u3092\u53d6\u308a\u9055\u3048\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u51fa\u5178<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc1982.html\">RFC 1982 \u2014 Serial Number Arithmetic<\/a>\uff081996\u5e748\u6708\u3001Proposed Standard\uff09\u30022\u301c5\u7bc0\u30017\u7bc0\u3002\u6f14\u7b97\u898f\u5247\u3068DNS\u306e32\u30d3\u30c3\u30c8\u7a7a\u9593\u3002<\/li>\n<li><a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc1035.html\">RFC 1035 \u2014 Domain Names &#8211; Implementation and Specification<\/a>\uff081987\u5e7411\u6708\uff09\u30023.3.13\u7bc0\u306eSOA SERIAL\u30fbEXPIRE\u6b04\u3002\u6bd4\u8f03\u306e\u8a73\u7d30\u306f\u5f8c\u7d9a\u306eRFC 1982\u3092\u53c2\u7167\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>DNS\u306e\u8a2d\u5b9a\u3092\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u3067\u305d\u308d\u3048\u308b\u3068\u304d\u3001\u300c\u3069\u3061\u3089\u304c\u65b0\u3057\u3044\u7248\u304b\u300d\u3092\u8868\u3059\u306e\u304cSOA\u30ec\u30b3\u30fc\u30c9\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3067\u3059\u3002\u3068\u3053\u308d\u304c\u3001\u6570\u5b57\u3068\u3057\u3066\u5c0f\u3055\u3044\u756a\u53f7\u304c\u65b0\u3057\u3044\u7248\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u756a\u53f7\u3092\u5165\u308c\u308b\u5834\u6240\u306e\u5927\u304d\u3055\u304c\u6709\u9650\u3067\u3001\u4e0a\u9650\u306e\u6b21\u306b\u5148\u982d [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1452,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":false,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[29],"tags":[288],"class_list":["post-1454","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-communications-networking","tag-dns-serial-arithmetic"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-dns-serial-wraparound-20261023-featured-a8fd4f213dc0.png","_links":{"self":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1454"}],"version-history":[{"count":1,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1454\/revisions"}],"predecessor-version":[{"id":1455,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1454\/revisions\/1455"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/media\/1452"}],"wp:attachment":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1454"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}