{"id":17805,"date":"2024-11-18T14:31:23","date_gmt":"2024-11-18T06:31:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/17805\/"},"modified":"2024-11-18T14:31:23","modified_gmt":"2024-11-18T06:31:23","slug":"linux%e7%b3%bb%e7%bb%9fdhcp%e5%8c%85%e6%9f%a5%e6%89%be%e7%9a%84%e5%b8%b8%e7%94%a8%e5%91%bd%e4%bb%a4%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/17805\/","title":{"rendered":"Linux\u7cfb\u7edfDHCP\u5305\u67e5\u627e\u7684\u5e38\u7528\u547d\u4ee4\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

\"Linux\u7cfb\u7edfDHCP\u5305\u67e5\u627e\u7684\u5e38\u7528\u547d\u4ee4\u6709\u54ea\u4e9b\uff1f\u63d2\u56fe\"<\/p>\n

\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u67e5\u627eDHCP\u5305\u7684\u5e38\u7528\u547d\u4ee4\u53ef\u4ee5\u5e2e\u52a9\u7f51\u7edc\u7ba1\u7406\u5458\u8bca\u65ad\uff0c\u5b9a\u4f4dDHCP\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u901a\u4fe1\u662f\u5426\u6b63\u5e38\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u547d\u4ee4\u53ca\u5176\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

    \n
  1. \n

    tcpdump\u547d\u4ee4<\/strong>\uff1a
    tcpdump\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u7f51\u7edc\u6293\u5305\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u6355\u83b7\u548c\u5206\u6790\u7f51\u7edc\u6570\u636e\u5305\u3002\u901a\u8fc7tcpdump\u53ef\u4ee5\u67e5\u770bDHCP\u5305\u7684\u4ea4\u4e92\u8fc7\u7a0b\u3002<\/p>\n

    # tcpdump -i <interface> port 67 or port 68<\/interface><\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8fd9\u6761\u547d\u4ee4\u5c06\u76d1\u89c6\u6307\u5b9a\u7f51\u7edc\u63a5\u53e3\u4e0a\u7684DHCP\u6570\u636e\u5305\u4f20\u8f93\u3002\u4f60\u53ef\u4ee5\u66ff\u6362 \u4e3a\u5b9e\u9645\u7684\u7f51\u7edc\u63a5\u53e3\u540d\u79f0\u3002 <\/p>\n<\/li>\n
  2. \n
    dhclient\u547d\u4ee4<\/strong>\uff1a
    dhclient\u662fLinux\u7cfb\u7edf\u4e0a\u7684DHCP\u5ba2\u6237\u7aef\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u624b\u52a8\u89e6\u53d1DHCP\u4ea4\u4e92\u8fc7\u7a0b\u3002\u901a\u8fc7dhclient\u547d\u4ee4\uff0c\u53ef\u4ee5\u67e5\u770bDHCP\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u8fc7\u7a0b\u3002<\/p>\n
    # dhclient -v <interface><\/interface><\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8fd9\u6761\u547d\u4ee4\u4f1a\u5728\u6307\u5b9a\u7684\u7f51\u7edc\u63a5\u53e3\u4e0a\u6267\u884cDHCP\u5ba2\u6237\u7aef\u5e76\u6253\u5370\u8be6\u7ec6\u7684\u8c03\u8bd5\u4fe1\u606f\u3002<\/p>\n<\/li>\n
  3. \n
    dhcpdump\u547d\u4ee4<\/strong>\uff1a
    dhcpdump\u662f\u4e00\u4e2a\u4e13\u95e8\u7528\u4e8e\u5206\u6790DHCP\u6570\u636e\u5305\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u66f4\u52a0\u65b9\u4fbf\u5730\u67e5\u770bDHCP\u5305\u7684\u8be6\u7ec6\u5185\u5bb9\u3002<\/p>\n
    # dhcpdump -i <interface><\/interface><\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8fd9\u6761\u547d\u4ee4\u5c06\u5728\u6307\u5b9a\u7684\u7f51\u7edc\u63a5\u53e3\u4e0a\u6293\u53d6DHCP\u6570\u636e\u5305\uff0c\u5e76\u4ee5\u6613\u8bfb\u7684\u683c\u5f0f\u663e\u793aDHCP\u5305\u7684\u5185\u5bb9\u3002<\/p>\n<\/li>\n
  4. \n
    wireshark\u547d\u4ee4<\/strong>\uff1a
    wireshark\u662f\u4e00\u4e2a\u7f51\u7edc\u5c01\u5305\u5206\u6790\u8f6f\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u6355\u83b7\u548c\u5206\u6790DHCP\u6570\u636e\u5305\u3002<\/p>\n
    # wireshark<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8fd0\u884c\u8fd9\u4e2a\u547d\u4ee4\u540e\uff0c\u4f1a\u6253\u5f00wireshark\u7684\u56fe\u5f62\u754c\u9762\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u754c\u9762\u8fdb\u884c\u8fc7\u6ee4\u548c\u67e5\u770bDHCP\u5305\u7684\u5185\u5bb9\u3002<\/p>\n<\/li>\n<\/ol>\n
    \u901a\u8fc7\u4ee5\u4e0a\u8fd9\u4e9b\u547d\u4ee4\uff0c\u7f51\u7edc\u7ba1\u7406\u5458\u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u67e5\u627e\u3001\u5206\u6790\u548c\u8bca\u65adDHCP\u5305\u5728Linux\u7cfb\u7edf\u4e2d\u7684\u4f20\u8f93\u60c5\u51b5\uff0c\u5e2e\u52a9\u5b9a\u4f4d\u7f51\u7edc\u95ee\u9898\u5e76\u8fdb\u884c\u76f8\u5e94\u7684\u89e3\u51b3\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662fLinux\u7cfb\u7edfDHCP\u5305\u67e5\u627e\u7684\u5e38\u7528\u547d\u4ee4\u6709\u54ea\u4e9b\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u67e5\u627eDHCP\u5305\u7684\u5e38\u7528\u547d\u4ee4\u53ef\u4ee5\u5e2e\u52a9\u7f51\u7edc\u7ba1\u7406\u5458\u8bca\u65ad\uff0c\u5b9a\u4f4dDHCP\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u901a\u4fe1\u662f\u5426\u6b63\u5e38\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u547d\u4ee4\u53ca\u5176\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\uff1a tcpdump\u547d\u4ee4\uff1atcpdump\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u7f51\u7edc\u6293\u5305\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u6765\u6355\u83b7\u548c\u5206\u6790\u7f51\u7edc\u6570\u636e\u5305\u3002\u901a\u8fc7tcpdump\u53ef\u4ee5\u67e5\u770bDHCP\u5305\u7684\u4ea4\u4e92\u8fc7\u7a0b\u3002 # tcpdump -i <interface> port 67 or port 68<\/interface> \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u6761\u547d\u4ee4\u5c06\u76d1\u89c6\u6307\u5b9a\u7f51\u7edc\u63a5\u53e3\u4e0a\u7684DHCP\u6570\u636e\u5305\u4f20\u8f93\u3002\u4f60\u53ef\u4ee5\u66ff\u6362 \u4e3a\u5b9e\u9645\u7684\u7f51\u7edc\u63a5\u53e3\u540d\u79f0\u3002 dhclient\u547d\u4ee4\uff1adhclient\u662fLinux\u7cfb\u7edf\u4e0a\u7684DHCP\u5ba2\u6237\u7aef\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u624b\u52a8\u89e6\u53d1DHCP\u4ea4\u4e92\u8fc7\u7a0b\u3002\u901a\u8fc7dhclient\u547d\u4ee4\uff0c\u53ef\u4ee5\u67e5\u770bDHCP\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u8fc7\u7a0b\u3002 # dhclient -v <interface><\/interface> \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u6761\u547d\u4ee4\u4f1a\u5728\u6307\u5b9a\u7684\u7f51\u7edc\u63a5\u53e3\u4e0a\u6267\u884cDHCP\u5ba2\u6237\u7aef\u5e76\u6253\u5370\u8be6\u7ec6\u7684\u8c03\u8bd5\u4fe1\u606f\u3002 dhcpdump\u547d\u4ee4\uff1adhcpdump\u662f\u4e00\u4e2a\u4e13\u95e8\u7528\u4e8e\u5206\u6790DHCP\u6570\u636e\u5305\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u66f4\u52a0\u65b9\u4fbf\u5730\u67e5\u770bDHCP\u5305\u7684\u8be6\u7ec6\u5185\u5bb9\u3002 # dhcpdump -i <interface><\/interface> \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u6761\u547d\u4ee4\u5c06\u5728\u6307\u5b9a\u7684\u7f51\u7edc\u63a5\u53e3\u4e0a\u6293\u53d6DHCP\u6570\u636e\u5305\uff0c\u5e76\u4ee5\u6613\u8bfb\u7684\u683c\u5f0f\u663e\u793aDHCP\u5305\u7684\u5185\u5bb9\u3002 wireshark\u547d\u4ee4\uff1awireshark\u662f\u4e00\u4e2a\u7f51\u7edc\u5c01\u5305\u5206\u6790\u8f6f\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u6355\u83b7\u548c\u5206\u6790DHCP\u6570\u636e\u5305\u3002 # wireshark \u767b\u5f55\u540e\u590d\u5236 \u8fd0\u884c\u8fd9\u4e2a\u547d\u4ee4\u540e\uff0c\u4f1a\u6253\u5f00wireshark\u7684\u56fe\u5f62\u754c\u9762\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u754c\u9762\u8fdb\u884c\u8fc7\u6ee4\u548c\u67e5\u770bDHCP\u5305\u7684\u5185\u5bb9\u3002 \u901a\u8fc7\u4ee5\u4e0a\u8fd9\u4e9b\u547d\u4ee4\uff0c\u7f51\u7edc\u7ba1\u7406\u5458\u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u67e5\u627e\u3001\u5206\u6790\u548c\u8bca\u65adDHCP\u5305\u5728Linux\u7cfb\u7edf\u4e2d\u7684\u4f20\u8f93\u60c5\u51b5\uff0c\u5e2e\u52a9\u5b9a\u4f4d\u7f51\u7edc\u95ee\u9898\u5e76\u8fdb\u884c\u76f8\u5e94\u7684\u89e3\u51b3\u3002 \u4ee5\u4e0a\u5c31\u662fLinux\u7cfb\u7edfDHCP\u5305\u67e5\u627e\u7684\u5e38\u7528\u547d\u4ee4\u6709\u54ea\u4e9b\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-17805","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=17805"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17805\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=17805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=17805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=17805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}