\u3000\u3053\u306e\u30d6\u30ed\u30b0\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u7cfb\u306e\u8a18\u4e8b\u3068\u6620\u753b\u7cfb\u306e\u3068\u304c\u3054\u3061\u3083\u307e\u305c\u3067\u3059\u304c\u3001\u6570\u5c11\u306a\u3044\u8aad\u8005\u306e\u65b9\u3005\u306f\u3069\u3061\u3089\u3092\u671f\u5f85\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u2026
\n\u3000\u4eca\u56de\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30cd\u30bf\u3092\u3002<\/p>\n
\u3000Google\u306e\u30a6\u30a7\u30d6\u30de\u30b9\u30bf\u30fc\u30c4\u30fc\u30eb<\/a>\u3067\u5c11\u6570\u306eDNS\u30a8\u30e9\u30fc\u304c\u5831\u544a\u3055\u308c\u308b\u3002\u3057\u304b\u3057\u624b\u5143\u3067\u30db\u30b9\u30c8\u540d\u3092\u5f15\u3044\u3066\u307f\u3066\u3082\u307b\u3068\u3093\u3069\u82e5\u3057\u304f\u306f\u5168\u304f\u30a8\u30e9\u30fc\u306f\u8d77\u3053\u3089\u306a\u3044\u3002<\/p>\n \u3000\u5f53\u8a72\u30c9\u30e1\u30a4\u30f3\u3092\u53d7\u3051\u6301\u3064\u516c\u5f0f(authoritative)\u30b5\u30fc\u30d0\u304c\u3001DNS Amplification\u653b\u6483(DNS Amp\u30fbDNS reflecton)\u306e\u305f\u3081\u306e\u5927\u91cf\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u3051\u3066\u3044\u305f\u305f\u3081\u306b\u3001DNS\u3078\u306e\u5fdc\u7b54\u304c\u9045\u308c\u3066\u3044\u305f\u305f\u3081\u3002 \u3000\u307e\u305a\u3001\u5f53\u8a72DNS\u30b5\u30fc\u30d0\u304copen resolver\u306e\u5834\u5408\u3001\u4ed6\u306e\u30db\u30b9\u30c8\u3078\u306e\u653b\u6483\u306b\u5229\u7528\u3055\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u5916\u90e8\u304b\u3089\u306e\u518d\u5e30\u30af\u30a8\u30ea\u3092\u7981\u6b62\u3059\u308b\u306a\u3069\u3057\u3066\u65e9\u6025\u306bopen resolver\u3067\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002 DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\u3092\u4f7f\u7528\u3057\u305f\u300cDNS\u30a2\u30f3\u30d7\u300d\u653b\u6483\u304c\u767a\u751f\u4e2d\u2026\u2026\u518d\u5e30\u7684\u306a\u554f\u3044\u5408\u308f\u305b\u3092\u60aa\u7528<\/a> \u3000\u3053\u306e\u30d6\u30ed\u30b0\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u7cfb\u306e\u8a18\u4e8b\u3068\u6620\u753b\u7cfb\u306e\u3068\u304c\u3054\u3061\u3083\u307e\u305c\u3067\u3059\u304c\u3001\u6570\u5c11\u306a\u3044\u8aad\u8005\u306e\u65b9\u3005\u306f\u3069\u3061\u3089\u3092\u671f\u5f85\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u2026 \u3000\u4eca\u56de\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30cd\u30bf\u3092\u3002 \u75c7\u72b6 \u3000Google\u306e\u30a6\u30a7\u30d6\u30de\u30b9\u30bf\u30fc\u30c4\u30fc\u30eb\u3067\u5c11\u6570\u306eDNS\u30a8\u30e9\u30fc\u304c\u5831 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-9750","post","type-post","status-publish","format-standard","hentry","category-6"],"_links":{"self":[{"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9750"}],"version-history":[{"count":0,"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9750\/revisions"}],"wp:attachment":[{"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9750"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9750"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/tec-jpn.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\u539f\u56e0(\u306e\u4e00\u4f8b)<\/h3>\n
\n\u3000\u3053\u306e\u3053\u3068\u306f\u3001\u4f8b\u3048\u3070Linux + BIND\u306e\u5834\u5408\u3001syslog\u306b\u6b21\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u5927\u91cf\u306b\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3067\u78ba\u8a8d\u3067\u304d\u308b\u3002
\nnamed[1528]: client 24.13.152.253#12767: query (cache) 'a.packetdevil.com\/A\/IN' denied<\/code>
\n\u3000\u306a\u304a\u3001open resolver\u306b\u306a\u3063\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u3082\u78ba\u8a8d\u3067\u304d\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/p>\n\u5bfe\u51e6\u7b56(\u306e\u4e00\u4f8b)<\/h3>\n
\n\u3000\u305d\u306e\u4e0a\u3067\u3001\u5f53\u8a72DNS\u30b5\u30fc\u30d0\u4e0a\u3067\u30d1\u30b1\u30c3\u30c8\u30d5\u30a3\u30eb\u30bf\u3092\u5b9f\u65bd\u3059\u308b\u3002Linux\u306eiptables\u306e\u5834\u5408\u3001GitHub\u306bDNS Amp\u7528\u30d5\u30a3\u30eb\u30bf\u3092\u81ea\u52d5\u7684\u306b\u3068\u3063\u3066\u304d\u3066\u9069\u7528\u3059\u308b\u305f\u3081\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u4e0a\u304c\u3063\u3066\u3044\u308b<\/a>\u306e\u3067\u3001\u3053\u308c\u3092\u5229\u7528\u3059\u308b\u306e\u304c\u4fbf\u5229\u3002<\/p>\n\u53c2\u8003\u6587\u732e<\/h3>\n
\nDNS Amp\u306e\u8105\u5a01<\/a>
\n\u5206\u6563\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08DDoS\uff09\u653b\u6483\u3092\u4ed5\u639b\u3051\u308bDNS amp\u3068\u306f\uff1f<\/a>
\n\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0(Open Resolver)\u306b\u5bfe\u3059\u308b\u6ce8\u610f\u559a\u8d77<\/a>
\nDNS Amplification Attacks Observer<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"