{"id":3988,"date":"2020-04-15T10:00:28","date_gmt":"2020-04-15T01:00:28","guid":{"rendered":"https:\/\/hldc.co.jp\/blog\/?p=3988"},"modified":"2025-02-18T11:57:18","modified_gmt":"2025-02-18T02:57:18","slug":"%e5%ae%a2%e5%85%88%e3%81%a7%e3%81%97%e3%81%8b%e7%99%ba%e7%94%9f%e3%81%97%e3%81%aa%e3%81%84%e4%b8%8d%e5%85%b7%e5%90%88%e3%81%a7%e5%9b%b0%e3%81%a3%e3%81%a6%e3%81%be%e3%81%99%e3%83%bb%e3%83%bb-10","status":"publish","type":"post","link":"https:\/\/hldc.co.jp\/blog\/2020\/04\/15\/3988\/","title":{"rendered":"Wireshark\u306e\u4f7f\u3044\u65b9<br>\uff5eWireshark\u3067\u300cTCP\/IP\u300d\u30e2\u30c7\u30eb\u3092\u306e\u305e\u304d\u898b\u308b\uff5e"},"content":{"rendered":"<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u57fa\u672c\u306e\u7406\u89e3\u306e\u8fd1\u9053\u306b\u306a\u308b\u624b\u6bb5\u306e\u3072\u3068\u3064\u3068\u3057\u3066\u3001\u5b9f\u969b\u306b\u751f\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u4e2d\u8eab\u3092\u81ea\u5206\u306e\u76ee\u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u305d\u3053\u3067\u4eca\u56de\u306f\u3001\u5b9f\u969b\u306bWireshark\u3067\u30d1\u30b1\u30c3\u30c8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3001\u305d\u306e\u30c7\u30fc\u30bf\u306b\u306f\u3069\u3046\u3044\u3063\u305f\u610f\u5473\u304c\u3042\u308b\u306e\u304b\u3001Wireshark\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u4ea4\u3048\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u5b9f\u969b\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3068\u3001\u3088\u304f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u53c2\u8003\u66f8\u7b49\u3067\u76ee\u306b\u3059\u308b\u300cTCP\/IP\u968e\u5c64\u30e2\u30c7\u30eb\u300d\u3068\u3044\u3046\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c\u628a\u63e1\u3067\u304d\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3064\u306a\u304c\u308c\u305f\u7570\u306a\u308bPC\u306e\u7570\u306a\u308b\u30d7\u30ed\u30bb\u30b9\u540c\u58eb\u304c\u30c7\u30fc\u30bf\u3092\u9001\u53d7\u4fe1\u3067\u304d\u308b\u4ed5\u7d44\u307f\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"box_border_gray\">\n<h5>CONTENTS<\/h5>\n<ol>\n<li><a href=\"#cont1\">Wireshark\u3068\u306f<\/a><\/li>\n<li><a href=\"#cont2\">Wireshark\u306e\u4f7f\u3044\u65b9<\/a>\n<ul>\n<li><a href=\"#cont2-1\">\u30d1\u30b1\u30c3\u30c8\u53d6\u5f97\u306e\u958b\u59cb\u3068\u505c\u6b62<\/a><\/li>\n<li><a href=\"#cont2-2\">\u30ea\u30b9\u30c8\u3092\u898b\u3084\u3059\u304f\u3059\u308b\u65b9\u6cd5<\/a><\/li>\n<li><a href=\"#cont2-3\">\u30d1\u30b1\u30c3\u30c8\u306e\u898b\u65b9<\/a><\/li>\n<\/ul>\n<\/li>\n<li><a href=\"#cont3\">\u300cTCP\/IP\u300d\u3068\u30d1\u30b1\u30c3\u30c8\u306e\u6d41\u308c<\/a>\n<ul>\n<li><a href=\"#cont3-1\">TCP\/IP\u968e\u5c64\u30e2\u30c7\u30eb\u3068\u5404\u968e\u5c64\u306e\u30c7\u30fc\u30bf<\/a><\/li>\n<li><a href=\"#cont3-2\">\u30d1\u30b1\u30c3\u30c8\u304c\u9001\u4fe1\u5143\u304b\u3089\u53d7\u4fe1\u5148\u306b\u305f\u3069\u308a\u7740\u304f\u307e\u3067<\/a><\/li>\n<li><a href=\"#cont3-3\">\u30d1\u30b1\u30c3\u30c8\u3092\u8997\u3044\u3066\u307f\u308b<\/a><\/li>\n<\/ul>\n<\/li>\n<li><a href=\"#cont4\">\u307e\u3068\u3081<\/a><\/li>\n<\/ol>\n<\/div>\n<div id=\"cont1\" class=\"anchor\">&nbsp;<\/div>\n<h2 class=\"title\">Wireshark\u3068\u306f<\/h2>\n<p>Wireshark\u306f\u3001LAN\u4e0a\u306b\u6d41\u308c\u3066\u3044\u308b\u30d1\u30b1\u30c3\u30c8\u3092\u300c\u898b\u3048\u308b\u5316\u300d\u3059\u308b\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u30c4\u30fc\u30eb\u3067\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af(LAN)\u4e0a\u306b\u306f\u3044\u308d\u3044\u308d\u306a\u7a2e\u985e\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u6d41\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30d1\u30b1\u30c3\u30c8\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u3001\u305d\u306e\u30d1\u30b1\u30c3\u30c8\u306f\u3069\u306e\u3088\u3046\u306a\u7a2e\u5225\u306e\u30c7\u30fc\u30bf(\u30d5\u30a3\u30fc\u30eb\u30c9)\u304c\u3042\u308a\u3001\u305d\u306e\u5024\u306f\u4f55\u306a\u306e\u304b\u3001\u3068\u3044\u3046\u30d1\u30b1\u30c3\u30c8\u306e\u4e2d\u8eab\u3092\u8a73\u7d30\u306b\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u958b\u767a\u8005\u306e\u30c7\u30d0\u30c3\u30b0\u3084\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u4e3b\u306a\u7528\u9014\u3067\u3059\u3002<\/p>\n<p>\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u30c4\u30fc\u30eb(LAN\u30a2\u30ca\u30e9\u30a4\u30b6\u3068\u3044\u3046\u8a00\u3044\u65b9\u304c\u6b63\u78ba\u304b\u3082\u3057\u308c\u307e\u305b\u3093)\u306b\u306f\u69d8\u3005\u3042\u308a\u307e\u3059\u304c\u3001\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306eWireshark\u306f\u8ab0\u3067\u3082\u81ea\u7531\u306b\u5229\u7528\u3067\u304d\u3001Windows\u3060\u3051\u3067\u306a\u304fMac OS X\u3001Linux\u3001\u5404\u7a2eBSD\u306a\u3069\u3001\u69d8\u3005\u306a\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u3082\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u305d\u3057\u3066\u5177\u4f53\u7684\u306b\u4f55\u304c\u3067\u304d\u3066\u4f55\u304c\u3067\u304d\u306a\u3044\u306e\u304b\u3001\u4ee5\u4e0b\u306e\u8868\u306b\u7c21\u5358\u306b\u307e\u3068\u3081\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-4008\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_ProsCons-1024x257.png\" alt=\"\" width=\"1024\" height=\"257\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_ProsCons-1024x257.png 1024w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_ProsCons-300x75.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_ProsCons-768x192.png 768w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_ProsCons-1080x271.png 1080w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_ProsCons.png 1517w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<div id=\"cont2\" class=\"anchor\">&nbsp;<\/div>\n<h2 class=\"title\">Wireshark\u306e\u4f7f\u3044\u65b9<\/h2>\n<p>\u5b9f\u969b\u306bWireshark\u3092\u4f7f\u3063\u3066\u30d1\u30b1\u30c3\u30c8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u4eca\u56de\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u69cb\u6210\u3067DT10\u306e\u30ed\u30b0\u30c7\u30fc\u30bf\u3092Ethernet\u7d4c\u7531\u3067\u53d6\u5f97\u3057\u307e\u3059\u3002<img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4062\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Environment.png\" alt=\"\" width=\"541\" height=\"168\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Environment.png 618w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Environment-300x93.png 300w\" sizes=\"(max-width: 541px) 100vw, 541px\" \/><\/p>\n<p>\u5c11\u3057\u88dc\u8db3\u3057\u307e\u3059\u3068\u3001DT10\u3068\u306f\u30bf\u30fc\u30b2\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u30c6\u30b9\u30c8\u30dd\u30a4\u30f3\u30c8(\u2252printf\u30c7\u30d0\u30c3\u30b0\u3067\u4f7f\u7528\u3059\u308bprint\u6587)\u3092\u81ea\u52d5\u3067\u633f\u5165\u3057\u3066\u3001\u5b9f\u969b\u306b\u30bf\u30fc\u30b2\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5b9f\u884c\u3055\u308c\u305f\u3068\u304d\u306b\u30c6\u30b9\u30c8\u30dd\u30a4\u30f3\u30c8\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3057\u3001\u5b9f\u884c\u7d4c\u8def\u3084\u51e6\u7406\u6642\u9593\u30fb\u30ab\u30d0\u30ec\u30c3\u30b8\u306a\u3069\u3092\u89e3\u6790\u3067\u304d\u308b\u5f0a\u793e\u306e\u30c6\u30b9\u30c8\u30c4\u30fc\u30eb\u3067\u3059\u3002\u30bf\u30fc\u30b2\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089DT10\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u52d5\u4f5c\u3057\u3066\u3044\u308bPC\u306b\u5bfe\u3057\u3066\u30c6\u30b9\u30c8\u30dd\u30a4\u30f3\u30c8\u30c7\u30fc\u30bf\u304c\u9001\u4fe1\u3055\u308c\u3066\u3044\u308b\u3068\u304d\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u5b9f\u884c\u3057\u307e\u3057\u305f\u3002<\/p>\n<div id=\"cont2-1\" class=\"anchor\">&nbsp;<\/div>\n<h5 class=\"underline\">\u30d1\u30b1\u30c3\u30c8\u53d6\u5f97\u306e\u958b\u59cb\u3068\u505c\u6b62<\/h5>\n<p>Wireshark\u3092\u8d77\u52d5\u3059\u308b\u3068\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u4e00\u89a7\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u305f\u3044\u9805\u76ee\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u56f3\u306e\u3088\u3046\u306bIPv6\u3084\u4eee\u60f3\u74b0\u5883\u306e\u3082\u306e\u306a\u3069\u3001\u4eca\u56de\u5b9f\u969b\u306b\u898b\u305f\u3044\u3082\u306e\u4ee5\u5916\u306b\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u30de\u30a6\u30b9\u3092\u5f53\u3066\u308b\u3068IP\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u60c5\u5831\u304c\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u9069\u5207\u306a\u3082\u306e\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u3061\u306a\u307f\u306b\u3001\u300cCtrl\u300d\u3084\u300cShift\u300d\u30ad\u30fc\u3067\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4059\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_InterfaceSelection-1024x540.png\" alt=\"\" width=\"785\" height=\"414\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_InterfaceSelection-1024x540.png 1024w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_InterfaceSelection-300x158.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_InterfaceSelection-768x405.png 768w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_InterfaceSelection-1080x569.png 1080w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_InterfaceSelection.png 1136w\" sizes=\"(max-width: 785px) 100vw, 785px\" \/><\/p>\n<p>\u9078\u629e\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u753b\u9762\u306b\u5207\u308a\u66ff\u308f\u308a\u3001\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u304c\u958b\u59cb\u3055\u308c\u307e\u3059\u3002\u30ad\u30e3\u30d7\u30c1\u30e3\u304c\u958b\u59cb\u3055\u308c\u308b\u3068\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306b\u30ea\u30b9\u30c8\u304c\u66f4\u65b0\u3055\u308c\u307e\u3059\u304c\u3001\u30d1\u30e9\u30d1\u30e9\u3068\u77ed\u6642\u9593\u306b\u305f\u304f\u3055\u3093\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u30ad\u30e3\u30d7\u30c1\u30e3\u3055\u308c\u305f\u308a\u3001\u77e5\u3089\u306a\u3044\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7528\u8a9e\u304c\u305f\u304f\u3055\u3093\u4e26\u3073\u307e\u3059\u306e\u3067\u3001\u521d\u3081\u3066\u304a\u4f7f\u3044\u306b\u306a\u308b\u65b9\u306f\u3061\u3087\u3063\u3068\u3073\u3063\u304f\u308a\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<div><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-large wp-image-4015\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView-1024x614.png\" alt=\"\" width=\"1024\" height=\"614\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView-1024x614.png 1024w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView-300x180.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView-768x460.png 768w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView-1080x647.png 1080w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView-1280x768.png 1280w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView-627x376.png 627w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView-440x264.png 440w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_OverView.png 1458w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/div>\n<p><\/p>\n<p>\u30d1\u30b1\u30c3\u30c8\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u505c\u6b62\u3059\u308b\u306b\u306f\u753b\u9762\u5de6\u4e0a\u90e8\u5206\u306e\u300c\u505c\u6b62\u300d\u30dc\u30bf\u30f3\u3092\u62bc\u4e0b\u3057\u307e\u3059\u3002\u307b\u3093\u306e\u6570\u5341\u79d2\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\u3067\u3057\u305f\u304c\u3001\u305f\u304f\u3055\u3093\u306e\u30d1\u30b1\u30c3\u30c8\u304c\u5b58\u5728\u3059\u308b\u305f\u3081\u3053\u306e\u307e\u307e\u3060\u3068\u76ee\u7684\u306e\u30c7\u30fc\u30bf\u307e\u3067\u305f\u3069\u308a\u7740\u304f\u306e\u304c\u5927\u5909\u305d\u3046\u3067\u3059\u3002<\/p>\n<div id=\"cont2-2\" class=\"anchor\">&nbsp;<\/div>\n<h5 class=\"underline\">\u30ea\u30b9\u30c8\u3092\u898b\u3084\u3059\u304f\u3059\u308b\u65b9\u6cd5<\/h5>\n<p>\u305d\u3053\u3067\u3001\u76ee\u7684\u306e\u30c7\u30fc\u30bf\u306b\u7d20\u65e9\u304f\u305f\u3069\u308a\u7740\u304f\u65b9\u6cd5\u306e\u3072\u3068\u3064\u3068\u3057\u3066\u300c\u30d5\u30a3\u30eb\u30bf\u6a5f\u80fd\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u30d1\u30b1\u30c3\u30c8\u81ea\u4f53\u306b\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u3059\u308b\u30ad\u30e3\u30d7\u30c1\u30e3\u30d5\u30a3\u30eb\u30bf\u3068\u3001\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u304b\u3089\u8868\u793a\u3059\u308b\u30d1\u30b1\u30c3\u30c8\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u8868\u793a\u30d5\u30a3\u30eb\u30bf\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u4eca\u56de\u306f\u5f8c\u8005\u306e\u8868\u793a\u30d5\u30a3\u30eb\u30bf\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u8868\u306f\u4e00\u4f8b\u3067\u3059\u304c\u3001\u5404\u30d7\u30ed\u30c8\u30b3\u30eb\u3084\u300c\u9001\u4fe1\u5143\u300d\u300c\u9001\u4fe1\u5148\u300d\u3068\u3044\u3063\u305f\u8981\u7d20\u3067\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4014\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktFilters.png\" alt=\"\" width=\"865\" height=\"181\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktFilters.png 983w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktFilters-300x63.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktFilters-768x161.png 768w\" sizes=\"(max-width: 865px) 100vw, 865px\" \/><\/p>\n<p>\u30d5\u30a3\u30eb\u30bf\u306e\u66f8\u5f0f\u306f\u69d8\u3005\u306a\u3082\u306e\u304c\u3042\u308a\u307b\u3093\u306e\u4e00\u4f8b\u306b\u904e\u304e\u307e\u305b\u3093\u304c\u3001\u4e0a\u8a18\u306e\u5f0f\u3092\u30d5\u30a3\u30eb\u30bf\u6307\u5b9a\u6b04\u306b\u5165\u529b\u3057\u307e\u3059\u3002\u305d\u308c\u306b\u3088\u308a\u3001\u6307\u5b9a\u3057\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u6307\u5b9a\u3057\u305f\u5024\u306b\u5408\u81f4\u3059\u308b\u30d1\u30b1\u30c3\u30c8\u3092\u8868\u793a\u3057\u307e\u3059\u3002\u9006\u306b\u3001\u6307\u5b9a\u3057\u305f\u5024\u306b\u5408\u81f4\u3059\u308b\u30d1\u30b1\u30c3\u30c8\u3092\u975e\u8868\u793a\u306b\u3059\u308b\u5834\u5408\u306f\u3001\u300cip.src!=192.168.100.100\u300d\u306e\u3088\u3046\u306b\u300c==\u300d\u3067\u306f\u306a\u304f\u300c!=\u300d\u3068\u66f8\u304f\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u4eca\u56de\u306e\u5834\u5408\u306f\u9001\u4fe1\u5143\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c192.168.10.136\u3001TCP\u30dd\u30fc\u30c8\u756a\u53f7\u304c3000\u3067\u3057\u305f\u306e\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4f75\u305b\u3066\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u884c\u3044\u3001\u78ba\u8a8d\u3057\u305f\u3044\u30c7\u30fc\u30bf\u306e\u307f\u3092\u8868\u793a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4018\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_AfterFiltered.png\" alt=\"\" width=\"365\" height=\"218\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_AfterFiltered.png 597w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_AfterFiltered-300x179.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_AfterFiltered-440x264.png 440w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><\/p>\n<div id=\"cont2-3\" class=\"anchor\">&nbsp;<\/div>\n<h5 class=\"underline\">\u30d1\u30b1\u30c3\u30c8\u306e\u898b\u65b9<\/h5>\n<p>\u30ea\u30b9\u30c8\u4e0a\u3067\u30d1\u30b1\u30c3\u30c8\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u305d\u306e\u30d1\u30b1\u30c3\u30c8\u306e\u8a73\u7d30\u8868\u793a\u3068\u3001\u751f\u306e\u30c7\u30fc\u30bf\u304cHEX(16\u9032\u6570)\u3067\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u8a73\u7d30\u8868\u793a\u3067\u306f\u3001\u3069\u3046\u3044\u3063\u305f\u30c7\u30fc\u30bf\u9818\u57df(\u30d5\u30a3\u30fc\u30eb\u30c9)\u304c\u5b58\u5728\u3057\u305d\u306e\u5024\u306f\u4f55\u306a\u306e\u304b\u3001\u3068\u3044\u3046\u3053\u3068\u3092\u968e\u5c64\u3084\u30d7\u30ed\u30c8\u30b3\u30eb\u3054\u3068\u306b\u4eba\u9593\u304c\u7406\u89e3\u3067\u304d\u308b\u5f62\u3067\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u8a73\u7d30\u8868\u793a\u306e\u5de6\u7aef\u300c\uff1e\u300d\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u95a2\u9023\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u3055\u3089\u306b\u8868\u793a\u3055\u308c\u3001\u8a72\u5f53\u3059\u308bHEX\u306e\u7b87\u6240\u304c\u30cf\u30a4\u30e9\u30a4\u30c8\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4021\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktDitalied.png\" alt=\"\" width=\"797\" height=\"420\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktDitalied.png 962w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktDitalied-300x158.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktDitalied-768x405.png 768w\" sizes=\"(max-width: 797px) 100vw, 797px\" \/><\/p>\n<p>\u30bf\u30fc\u30b2\u30c3\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u9001\u4fe1\u3055\u308c\u308bDT10\u306e\u30c6\u30b9\u30c8\u30dd\u30a4\u30f3\u30c8\u306e\u30c7\u30fc\u30bf\u306f\u4e0a\u56f3\u306eHEX\u3067\u30cf\u30a4\u30e9\u30a4\u30c8\u3055\u308c\u3066\u3044\u308b\u90e8\u5206\u306e10byte\u3067\u3059\u304c\u3001\u5b9f\u969b\u306b\u306f\u30d1\u30b1\u30c3\u30c8\u4e0a\u306b\u5b58\u5728\u3059\u308b\u30c7\u30fc\u30bf\u306f\u3053\u308c\u3088\u308a\u591a\u3044\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u3053\u306e\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u9001\u4fe1\u3057\u305f\u30c7\u30fc\u30bf\u300d\u3088\u308a\u591a\u304f\u306a\u3063\u3066\u3044\u308b\u90e8\u5206\u3092\u77e5\u308b\u305f\u3081\u306b\u95a2\u308f\u3063\u3066\u304f\u308b\u306e\u304c\u3001\u300cTCP\/IP\u300d\u3068\u3044\u3046\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u3059\u3002<\/p>\n<div id=\"cont3\" class=\"anchor\">&nbsp;<\/div>\n<h2 class=\"title\">\u300cTCP\/IP\u300d\u3068\u30d1\u30b1\u30c3\u30c8\u306e\u6d41\u308c<\/h2>\n<div id=\"cont3-1\" class=\"anchor\">&nbsp;<\/div>\n<h5 class=\"underline\">TCP\/IP\u968e\u5c64\u30e2\u30c7\u30eb\u3068\u5404\u968e\u5c64\u306e\u30c7\u30fc\u30bf<\/h5>\n<p>TCP\/IP\u968e\u5c64\u30e2\u30c7\u30eb\u3068\u300c\u305d\u308c\u305e\u308c\u306e\u968e\u5c64\u306f\u8981\u3059\u308b\u306b\u306a\u306b\uff1f\u300d\u3068\u3044\u3046\u3053\u3068\u3092\u8868\u3059\u3068\u4ee5\u4e0b\u306e\u8868\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4063\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_TCPIP.png\" alt=\"\" width=\"363\" height=\"264\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_TCPIP.png 477w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_TCPIP-300x218.png 300w\" sizes=\"(max-width: 363px) 100vw, 363px\" \/><\/div>\n<div>MAC\u30a2\u30c9\u30ec\u30b9\u3068\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c0\u30d7\u30bf(\u7121\u7ddaLAN\u3082\u542b\u3080)\u306b\u4ed8\u52a0\u3055\u308c\u3066\u3044\u308b\u3001\u4e16\u754c\u3067\u305f\u3060\u3072\u3068\u3064\u306e\u5024\u3067\u3059\u3002IP\u30a2\u30c9\u30ec\u30b9\u306f\u3044\u308f\u3070\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u8b58\u5225\u756a\u53f7\u300d\uff0b\u300c\u305d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u306e\u6a5f\u5668\u306e\u8b58\u5225\u756a\u53f7\u300d\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u3059\u3002\u3053\u3053\u307e\u3067\u3067\u3001\u30c7\u30fc\u30bf\u3092\u5c4a\u3051\u308b\u5b9b\u5148\u306ePC\u307e\u3067\u305f\u3069\u308a\u7740\u304d\u307e\u3059\u3002\u5b9f\u969b\u306b\u306fMAC\u30a2\u30c9\u30ec\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u7d10\u3065\u3051\u3059\u308b\u305f\u3081\u306e\u51e6\u7406\u3084\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u547c\u3070\u308c\u308b\u6700\u9069\u306a\u7d4c\u8def\u9078\u629e\u51e6\u7406\u3001\u30eb\u30fc\u30bf\u3084\u30cf\u30d6\u3092\u7d4c\u7531\u3059\u308b\u969b\u306e\u51e6\u7406\u306a\u3069\u4eca\u56de\u306f\u5272\u611b\u3057\u307e\u3059\u304c\u3001\u69d8\u3005\u306a\u51e6\u7406\u304c\u9014\u4e2d\u306b\u3042\u308a\u307e\u3059\u3002<\/div>\n<div>&nbsp;<\/div>\n<p>\u305d\u3057\u3066\u305f\u3069\u308a\u7740\u3044\u305fPC\u5185\u306b\u306f\u69d8\u3005\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30d7\u30ed\u30bb\u30b9\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u3059\u304c\u3001\u30dd\u30fc\u30c8\u756a\u53f7\u3068\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30d7\u30ed\u30bb\u30b9\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306e\u5024\u3068\u306a\u308a\u307e\u3059\u3002\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u8005\u306e\u65b9\u3067\u300c\u30bd\u30b1\u30c3\u30c8\u300d\u3068\u3044\u3046\u7528\u8a9e\u3092\u805e\u3044\u305f\u3053\u3068\u304c\u3042\u308b\u65b9\u3082\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3053\u306e\u30bd\u30b1\u30c3\u30c8\u3068\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30d7\u30ed\u30bb\u30b9\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u3064\u306a\u3052\u308b\u30c7\u30fc\u30bf\u306e\u51fa\u5165\u308a\u53e3\u3068\u306a\u308b\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002\u305d\u3057\u3066\u901a\u4fe1\u76f8\u624b\u306e\u30bd\u30b1\u30c3\u30c8\u3092\u8a8d\u8b58\u3059\u308b\u305f\u3081\u306b\u30dd\u30fc\u30c8\u756a\u53f7\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<div id=\"cont3-2\" class=\"anchor\">&nbsp;<\/div>\n<h5 class=\"underline\">\u30d1\u30b1\u30c3\u30c8\u304c\u9001\u4fe1\u5143\u304b\u3089\u53d7\u4fe1\u5148\u306b\u305f\u3069\u308a\u7740\u304f\u307e\u3067<\/h5>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4064\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_DataFlow-1024x436.png\" alt=\"\" width=\"900\" height=\"383\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_DataFlow-1024x436.png 1024w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_DataFlow-300x128.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_DataFlow-768x327.png 768w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_DataFlow-1080x460.png 1080w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_DataFlow.png 1600w\" sizes=\"(max-width: 900px) 100vw, 900px\" 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id=\"cont3-3\" class=\"anchor\">&nbsp;<\/div>\n<h5 class=\"underline\">\u30d1\u30b1\u30c3\u30c8\u3092\u8997\u3044\u3066\u307f\u308b<\/h5>\n<p>\u4ee5\u4e0a\u3092\u8e0f\u307e\u3048\u3066\u3001Wireshark\u3067\u53d6\u5f97\u3057\u305f\u30d1\u30b1\u30c3\u30c8\u3092\u8997\u3044\u3066\u307f\u308b\u3068\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u9001\u4fe1\u3057\u305f\u30c7\u30fc\u30bf\u4ee5\u5916\u306b\u5b58\u5728\u3059\u308b\u30c7\u30fc\u30bf\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u968e\u5c64\u3067\u4ed8\u52a0\u3055\u308c\u308b\u3001\u3042\u308b\u3044\u306f\u89e3\u91c8\u3055\u308c\u308b\u30c7\u30fc\u30bf\u304c\u5148\u982d\u304b\u3089\u4e26\u3093\u3067\u3044\u308b\u3053\u3068\u304c\u5b9f\u969b\u306b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4068 size-full\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktStructure.png\" alt=\"\" width=\"896\" height=\"235\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktStructure.png 896w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktStructure-300x79.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_PktStructure-768x201.png 768w\" sizes=\"(max-width: 896px) 100vw, 896px\" \/><\/p>\n<p>\u305d\u3057\u3066\u3001\u4e0b\u306e\u56f3\u306f\u5404\u30d8\u30c3\u30c0\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3092\u8868\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u4f8b\u3048\u3070\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5c64\u3067\u8a00\u3046\u3068\u3001IPv4\u304bIPv6\u304b\u3092\u793a\u3059\u300c\u30d0\u30fc\u30b8\u30e7\u30f3\u300d\u3001TCP\u3084UDP\u304b\u3092\u793a\u3059\u300c\u30d7\u30ed\u30c8\u30b3\u30eb\u300d\u306a\u3069\u3001\u4eca\u56de\u8aac\u660e\u3057\u305f\u4ee5\u5916\u306b\u3082\u901a\u4fe1\u306b\u5fc5\u8981\u306a\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Pkt.png\" rel=\"attachment wp-att-4119\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-4119 size-large\" src=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Pkt-1024x184.png\" alt=\"\" width=\"1024\" height=\"184\" srcset=\"https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Pkt-1024x184.png 1024w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Pkt-300x54.png 300w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Pkt-768x138.png 768w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Pkt-1080x194.png 1080w, https:\/\/hldc.co.jp\/blog\/wp-content\/uploads\/2020\/04\/Wireshark_Pkt.png 1650w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p>\n<p>\u306a\u304aWireshark\u306e\u30ed\u30b0\u3068\u4e0a\u8a18\u306e\u8868\u306b\u306f\u5c11\u3057\u76f8\u9055\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5c64\u306e\u300c\u30d7\u30ea\u30a2\u30f3\u30d7\u30eb\u300d\u306f\u30d1\u30b1\u30c3\u30c8\u9001\u4fe1\u524d\u306e\u540c\u671f\u4fe1\u53f7\u3067Wireshark\u306b\u306f\u8868\u793a\u3055\u308c\u307e\u305b\u3093\u306e\u3067\u3001Wireshark\u306b\u8868\u793a\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306e\u5148\u982d\u306f\u5b9b\u5148\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306b\u306a\u308a\u307e\u3059\u3002\u540c\u3058\u304f\u300c\u30d5\u30ec\u30fc\u30e0\u30c1\u30a7\u30c3\u30af\u30b7\u30fc\u30b1\u30f3\u30b9\u300d\u3082\u8868\u793a\u3055\u308c\u307e\u305b\u3093\u3002\u307e\u305f\u3001Ethernet\u306e\u30d1\u30b1\u30c3\u30c8\u306e\u6700\u5c0f\u30b5\u30a4\u30ba\u306f64byte\u3068\u6c7a\u3081\u3089\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u30b5\u30a4\u30ba\u306b\u6e80\u305f\u306a\u3044\u5834\u5408\u306f\u30d1\u30c7\u30a3\u30f3\u30b0\u3068\u3044\u30460\u8a70\u3081\u30c7\u30fc\u30bf\u304c\u4ed8\u52a0\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u4e0a\u8a18\u306e\u8868\u3067\u306f\u5b58\u5728\u3057\u307e\u305b\u3093\u304c\u3001Wireshark\u306b\u306f\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<div id=\"cont4\" class=\"anchor\">&nbsp;<\/div>\n<h2 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class=\"box_border_gray\">\n<h5>\u7d44\u8fbc\u307f\u30bd\u30d5\u30c8\u306e\u30d0\u30b0\u3092\u89e3\u6790\u3059\u308b\u300c\u52d5\u7684\u30c6\u30b9\u30c8\u30c4\u30fc\u30ebDT+\u300d<\/h5>\n<p><div class='one_half'>\n\t\t\t\t\t<iframe loading=\"lazy\" title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/qXJhYvdjeXE\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe>\n\t\t\t\t<\/div><br \/>\n<div class='one_half 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