{"id":629,"date":"2021-11-21T11:55:58","date_gmt":"2021-11-21T03:55:58","guid":{"rendered":"https:\/\/blog.cauchyschwarz.com\/?p=629"},"modified":"2021-12-14T23:33:50","modified_gmt":"2021-12-14T15:33:50","slug":"tcpdump","status":"publish","type":"post","link":"https:\/\/blog.cauchyschwarz.com\/?p=629","title":{"rendered":"tcpdump"},"content":{"rendered":"\n

tcpdump,wireshark\u662f\u5e38\u7528\u6293\u5305\u5de5\u5177\u3002\u8fd9\u91cc\u603b\u7ed3\u4e0btcpdump\u7528\u6cd5\u3002<\/p>\n\n\n\n

packet filter syntax<\/h1>\n\n\n\n

\u901a\u8fc7\u9605\u8bfbtcpdump\u7684manual\u53ef\u4ee5\u77e5\u9053tcpdump\u7528\u6765\u8fc7\u6ee4\u5305\u7684\u8868\u8fbe\u5f0f\u4f7f\u7528\u7684\u8bed\u6cd5\u6765\u81ea\u4e8epcap-filter\u3002\u901a\u8fc7\u9605\u8bfbpcap-filter\u7684manual\uff0c\u6211\u4eec\u53ef\u4ee5\u4e86\u89e3\u5230\u8fd9\u4e2a\u7528\u4e8e\u8fc7\u6ee4\u8981\u6293\u7684\u5305\u7684\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u4e00\u4e2a\u8fc7\u6ee4\u8868\u8fbe\u5f0f\u7531\u4e00\u4e2a\u6216\u51e0\u4e2aprimitive(\u5b50\u53e5\u6216\u8005\u539f\u8bed\uff1f\u7406\u89e3\u610f\u601d\u5c31\u884c)\u6309\u7167\u903b\u8f91\u5173\u7cfb\u7ec4\u5408\u5728\u4e00\u8d77\uff0c\u6ee1\u8db3\u8fd9\u4e2a\u7ec4\u5408\u6761\u4ef6\u7684\u5305\u624d\u4f1a\u88abtcpdump\u8bb0\u5f55\u4e0b\u6765\u3002\u6bcf\u4e2aprimitive\u901a\u5e38\u662f\u5bf9\u8981\u6293\u7684\u5305\u7684\u67d0\u4e2a\u5c42\u6b21\u534f\u8bae\u7684\u67d0\u4e2a\u5b57\u6bb5\u7684\u9650\u5236\uff0c\u6bd4\u5982\u7aef\u53e3\u3001\u5730\u5740\u4e4b\u7c7b\u3002\u4e3a\u4e86\u63cf\u8ff0\u6e05\u695a\u5230\u5e95\u662f\u5bf9\u54ea\u4e2a\u5b57\u6bb5\u505a\u9650\u5236\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e09\u79cd\u4e0d\u540c\u7684\u4fee\u9970\u8bcd(qualifier)\uff1atype(\u6307\u660e\u5b57\u6bb5), dir(\u6307\u660e\u7f51\u7edc\u4f20\u8f93\u65b9\u5411), proto(\u6307\u660e\u534f\u8bae)\u3002\u4e0b\u9762\u5217\u4e3e\u51e0\u4e2a\u4f8b\u5b50\u5c31\u660e\u767d\u4e86\uff1a<\/p>\n\n\n\n

dst host host<\/em>
\u6293\u53d6IPv4\/v6\u76ee\u6807\u5730\u5740\u662fhost\u7684\u5305\uff0c\u8fd9\u4e2ahost<\/em>\u53ef\u4ee5\u662fip\u5730\u5740\uff0c\u4e5f\u53ef\u4ee5\u662f\u57df\u540d\u6216\u8005\u4e3b\u673a\u540d<\/p>\n\n\n\n

src host host<\/em>
\u6293\u53d6IPv4\/v6\u6e90\u5730\u5740\u4e3ahost<\/em>\u7684\u5305<\/p>\n\n\n\n

host host<\/em>
\u6293\u53d6IPv4\/v6\u6e90\u5730\u5740\u6216\u8005\u76ee\u6807\u5730\u5740\u662fhost\u7684\u5305<\/p>\n\n\n\n

\u8bf4\u660e\uff1a<\/p>\n\n\n\n

  1. \u4e0a\u8ff0\u4f8b\u5b50\u4e2d\u7684dst,src\u5373\u4e3a\u65b9\u5411(dir)\uff0c\u5982\u679c\u4e0d\u6307\u660e\u90a3\u4e48\u5c31\u662f\u9ed8\u8ba4\u4e24\u4e2a\u65b9\u5411\u7684\u5305\u90fd\u6293\uff1b<\/li>
  2. \u4e0a\u8ff0\u4f8b\u5b50\u4e2d\u7684host<\/em>\u53ef\u4ee5\u540c\u65f6\u586b\u591a\u4e2a\u57df\u540d\u6216\u8005\u4e3b\u673a\u540d\uff0c\u53ea\u8981\u5305\u7684\u5730\u5740\u548c\u5176\u4e2d\u4efb\u4e00\u4e2a\u7b26\u5408\u90fd\u4f1a\u88abtcpdump\u6293\u5230\uff1b<\/li>
  3. \u4e0a\u8ff0\u4f8b\u5b50\u4e2d\u6ca1\u6709\u5199proto\uff0c\u9ed8\u8ba4\u4e3aip\u534f\u8bae\uff1b\u6309\u7167manual\uff0c\u4e0a\u9762\u7684\u7b2c\u4e09\u4e2a\u4f8b\u5b50\u53ef\u4ee5\u7b49\u540c\u4e8eip host host<\/em>\uff0c\u4e5f\u53ef\u4ee5\u7b49\u540c\u4e8eether proto ip and host host<\/em>\uff0c\u8fd9\u4e2aether proto ip and host host<\/em>\u53ef\u4ee5\u8fd9\u6837\u7406\u89e3\uff1a\u8be5\u8fc7\u6ee4\u8868\u8fbe\u5f0f\u6709\u4e24\u4e2a\u5b50\u53e5\uff0c\u7b2c\u4e00\u4e2a\u662f\u8bf4\u8fd9\u4e2a\u5305\u662fether\u534f\u8bae\u5305\u5e76\u4e14ether\u534f\u8bae\u91cc\u7684proto\u5b57\u6bb5\u7684\u503c\u6307\u7684\u662fip\u534f\u8bae\uff0c\u7b2c\u4e8c\u4e2a\u5b50\u53e5\u662f\u8bf4\u8fd9\u4e2a\u5305\u7684ip\u5730\u5740\u5fc5\u987b\u662fhost<\/em>\uff1b<\/li><\/ol>\n\n\n\n

    ether dst ehost<\/em>
    \u6293\u53d6ether\u534f\u8bae\u76ee\u7684\u5730\u5740\u4e3aehost<\/em>\u7684\u5305<\/p>\n\n\n\n

    ether src ehost<\/em>
    \u6293\u53d6ether\u534f\u8bae\u6e90\u5730\u5740\u4e3aehost<\/em>\u7684\u5305<\/p>\n\n\n\n

    ether host ehost<\/em>
    \u6293\u53d6ether\u534f\u8bae\u76ee\u7684\u5730\u5740\u6216\u8005\u6e90\u5730\u5740\u4e3aethos<\/em>\u7684\u5305<\/p>\n\n\n\n

    gateway host<\/em>
    \u6293\u53d6ether\u534f\u8bae\u76ee\u7684\u5730\u5740\u6216\u6e90\u5730\u5740\u662fhost<\/em>\uff0c\u4f46\u662fip\u534f\u8bae\u76ee\u7684\u5730\u5740\u548c\u6e90\u5730\u5740\u4e0d\u80fd\u662fhost<\/em>\u7684\u5305\uff0c\u8fd9\u4e2ahost<\/em>\u5fc5\u987b\u662f\u540d\u5b57\u3002\u7b49\u4ef7\u8868\u8fbe\u5f0f\uff1aether host ehost<\/em> and not host host<\/em>\uff0c\u8fd9\u4e2a\u7b49\u4ef7\u8868\u8fbe\u5f0f\u4e2d\u7684ehost<\/em>\u548chost<\/em>\u662f\u628agateway host<\/em>\u4e2d\u7684host<\/em>\u5206\u522b\u6309arp\u6620\u5c04\u5173\u7cfb\u548c\u4e3b\u673a\u540d\u4e0eip\u5730\u5740\u6620\u5c04\u5173\u7cfb\u8f6c\u6362\u5f97\u5230\u7684\u771f\u6b63\u7684ether\u534f\u8bae\u5730\u5740\u548cip\u5730\u5740\u3002<\/p>\n\n\n\n

    dst net net<\/em><\/p>\n\n\n\n

    tcpdump\u547d\u4ee4\u884c\u9009\u9879\u8bf4\u660e<\/h1>\n","protected":false},"excerpt":{"rendered":"

    tcpdump,wireshark\u662f\u5e38\u7528\u6293\u5305\u5de5\u5177\u3002\u8fd9\u91cc\u603b\u7ed3\u4e0btcpdump\u7528\u6cd5\u3002 packet filter syntax \u901a\u8fc7\u9605\u8bfbtcpdump\u7684manual\u53ef\u4ee5\u77e5\u9053tcpdump\u7528\u6765\u8fc7\u6ee4\u5305\u7684\u8868\u8fbe\u5f0f...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[61,28],"class_list":["post-629","post","type-post","status-publish","format-standard","hentry","category-10","tag-tcpdump","tag-28"],"_links":{"self":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=629"}],"version-history":[{"count":2,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/629\/revisions"}],"predecessor-version":[{"id":783,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/629\/revisions\/783"}],"wp:attachment":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}