{"id":51680,"date":"2024-12-03T13:17:12","date_gmt":"2024-12-03T05:17:12","guid":{"rendered":"https:\/\/fwq.ai\/blog\/51680\/"},"modified":"2024-12-03T13:17:12","modified_gmt":"2024-12-03T05:17:12","slug":"%e5%9c%a8linux%e7%b3%bb%e7%bb%9f%e4%b8%ad%e5%a6%82%e4%bd%95%e5%af%bb%e6%89%bedhcp%e6%95%b0%e6%8d%ae%e5%8c%85%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/51680\/","title":{"rendered":"\u5728Linux\u7cfb\u7edf\u4e2d\u5982\u4f55\u5bfb\u627eDHCP\u6570\u636e\u5305\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5728Linux\u7cfb\u7edf\u4e2d\u5982\u4f55\u5bfb\u627eDHCP\u6570\u636e\u5305\uff1f<\/h1>\n

\u5728Linux\u7cfb\u7edf\u4e2d\u67e5\u627eDHCP\u6570\u636e\u5305\u5bf9\u4e8e\u7f51\u7edc\u7ba1\u7406\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u4f7f\u7528tcpdump\u3001dhcpdump\u548cwireshark\u7b49\u547d\u4ee4\u548c\u5de5\u5177\uff0c\u7ba1\u7406\u5458\u53ef\u4ee5\u8f7b\u677e\u5730\u6355\u83b7\u3001\u5206\u6790\u548c\u8bca\u65adDHCP\u5305\u3002\u8fd9\u4e9b\u547d\u4ee4\u63d0\u4f9b\u5404\u79cd\u8fc7\u6ee4\u548c\u663e\u793a\u9009\u9879\uff0c\u4f7f\u7ba1\u7406\u5458\u80fd\u591f\u5feb\u901f\u5b9a\u4f4d\u548c\u89e3\u51b3DHCP\u76f8\u5173\u95ee\u9898\uff0c\u4ece\u800c\u786e\u4fdd\u7f51\u7edc\u7684\u5e73\u7a33\u8fd0\u884c\u3002<\/p>\n

\u6807\u9898\uff1a\u5982\u4f55\u4f7f\u7528Linux\u547d\u4ee4\u67e5\u627eDHCP\u5305\uff1f<\/p>\n

\u5728\u7f51\u7edc\u7ba1\u7406\u4e2d\uff0cDHCP\uff08\u52a8\u6001\u4e3b\u673a\u914d\u7f6e\u534f\u8bae\uff09\u5145\u5f53\u7740\u91cd\u8981\u7684\u89d2\u8272\uff0c\u8d1f\u8d23\u4e3a\u7f51\u7edc\u8bbe\u5907\u5206\u914dIP\u5730\u5740\u548c\u5176\u4ed6\u76f8\u5173\u914d\u7f6e\u3002\u5f53\u7f51\u7edc\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u8ffd\u8e2a\u548c\u8bca\u65adDHCP\u5305\u662f\u4e00\u9879\u5fc5\u8981\u7684\u64cd\u4f5c\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u901a\u8fc7\u4f7f\u7528\u4e00\u4e9b\u547d\u4ee4\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u67e5\u627e\u3001\u6355\u83b7\u548c\u5206\u6790DHCP\u5305\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u547d\u4ee4\u6765\u5b9e\u73b0\u8fd9\u4e00\u76ee\u7684\u3002<\/p>\n

1. \u4f7f\u7528tcpdump\u547d\u4ee4<\/strong><\/p>\n

tcpdump\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u7f51\u7edc\u5305\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u6355\u83b7\u548c\u5206\u6790\u7f51\u7edc\u6d41\u91cf\u3002\u4e0b\u9762\u662f\u4f7f\u7528tcpdump\u67e5\u627eDHCP\u5305\u7684\u547d\u4ee4\u793a\u4f8b\uff1a<\/p>\n

sudo tcpdump -i <interface> port 67 or port 68 -vv<\/pre>\n
\u5176\u4e2d\uff0c-i<\/code>\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u7f51\u7edc\u63a5\u53e3\uff08\u5982eth0\u3001wlan0\u7b49\uff09\uff0cport 67 or port 68<\/code>\u8868\u793a\u8fc7\u6ee4DHCP\u670d\u52a1\u5668\u7aef\u53e3\u548c\u5ba2\u6237\u7aef\u7aef\u53e3\uff0c-vv<\/code>\u7528\u4e8e\u8f93\u51fa\u66f4\u8be6\u7ec6\u7684\u4fe1\u606f\u3002\u6267\u884c\u6b64\u547d\u4ee4\u5c06\u6355\u83b7\u7ecf\u8fc7\u6307\u5b9a\u63a5\u53e3\u7684\u6240\u6709DHCP\u5305\u3002<\/p>\n
2. \u4f7f\u7528dhcpdump\u547d\u4ee4<\/strong><\/p>\n
dhcpdump\u662f\u53e6\u4e00\u4e2a\u7528\u4e8e\u5206\u6790DHCP\u5305\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u66f4\u76f4\u89c2\u5730\u663e\u793aDHCP\u4ea4\u4e92\u8fc7\u7a0b\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528dhcpdump\u6765\u67e5\u627eDHCP\u5305\u7684\u793a\u4f8b\u547d\u4ee4\uff1a<\/p>\n
sudo dhcpdump -i <interface><\/pre>\n
\u901a\u8fc7\u8fd9\u4e2a\u547d\u4ee4\uff0cdhcpdump\u5c06\u5b9e\u65f6\u663e\u793a\u7ecf\u8fc7\u6307\u5b9a\u63a5\u53e3\u7684DHCP\u4ea4\u4e92\u4fe1\u606f\uff0c\u5305\u62ecDHCP\u53d1\u73b0\u3001\u63d0\u4f9b\u3001\u8bf7\u6c42\u548c\u786e\u8ba4\u7b49\u9636\u6bb5\u7684\u6570\u636e\u5305\u3002<\/p>\n
3. \u4f7f\u7528wireshark\u5de5\u5177<\/strong><\/p>\n
wireshark\u662f\u4e00\u4e2a\u6d41\u884c\u7684\u7f51\u7edc\u534f\u8bae\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u56fe\u5f62\u5316\u5730\u663e\u793a\u7f51\u7edc\u6570\u636e\u5305\u7684\u5185\u5bb9\u3002\u901a\u8fc7wireshark\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fc7\u6ee4\u5e76\u67e5\u770bDHCP\u5305\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u4e0b\u9762\u662f\u4f7f\u7528wireshark\u6355\u83b7DHCP\u5305\u7684\u6b65\u9aa4\uff1a<\/p>\n
    \n
  • \u6253\u5f00wireshark\uff0c\u5e76\u9009\u62e9\u8981\u76d1\u542c\u7684\u7f51\u7edc\u63a5\u53e3\u3002<\/li>\n
  • \u5728\u8fc7\u6ee4\u680f\u4e2d\u8f93\u5165bootp<\/code>\u6216dhcp<\/code>\u4f5c\u4e3a\u8fc7\u6ee4\u6761\u4ef6\uff0c\u7136\u540e\u5f00\u59cb\u6355\u83b7\u3002<\/li>\n
  • \u901a\u8fc7\u8fc7\u6ee4\u540e\u7684\u6570\u636e\u5305\u5217\u8868\u548c\u5305\u8be6\u60c5\uff0c\u53ef\u4ee5\u67e5\u770b\u5230DHCP\u4ea4\u4e92\u7684\u6574\u4e2a\u8fc7\u7a0b\u3002<\/li>\n<\/ul>\n
    \u4ee5\u4e0a\u662f\u51e0\u79cd\u5e38\u7528\u7684\u5728Linux\u7cfb\u7edf\u4e0b\u67e5\u627eDHCP\u5305\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u8fd9\u4e9b\u547d\u4ee4\u548c\u5de5\u5177\u7684\u7ed3\u5408\u4f7f\u7528\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u7f51\u7edc\u6545\u969c\u6392\u67e5\u548c\u76d1\u63a7\u5de5\u4f5c\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5bf9\u8bfb\u8005\u7406\u89e3\u548c\u5e94\u7528Linux\u547d\u4ee4\u67e5\u627eDHCP\u5305\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
    \u672c\u7bc7\u5173\u4e8e\u300a\u5728Linux\u7cfb\u7edf\u4e2d\u5982\u4f55\u5bfb\u627eDHCP\u6570\u636e\u5305\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n
    \n
    <\/dt>\n
    \n   \u5b9e\u73b0PHP\u65e5\u671f\u65f6\u95f4\u5411\u6570\u5b57\u8f6c\u6362\u7684\u6280\u5de7\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
    \u5728Linux\u7cfb\u7edf\u4e2d\u5982\u4f55\u5bfb\u627eDHCP\u6570\u636e\u5305\uff1f \u5728Linux\u7cfb\u7edf\u4e2d\u67e5\u627eDHCP\u6570\u636e\u5305\u5bf9\u4e8e\u7f51\u7edc\u7ba1\u7406\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u4f7f\u7528tcpdump\u3001dhcpdump\u548cwireshark\u7b49\u547d\u4ee4\u548c\u5de5\u5177\uff0c\u7ba1\u7406\u5458\u53ef\u4ee5\u8f7b\u677e\u5730\u6355\u83b7\u3001\u5206\u6790\u548c\u8bca\u65adDHCP\u5305\u3002\u8fd9\u4e9b\u547d\u4ee4\u63d0\u4f9b\u5404\u79cd\u8fc7\u6ee4\u548c\u663e\u793a\u9009\u9879\uff0c\u4f7f\u7ba1\u7406\u5458\u80fd\u591f\u5feb\u901f\u5b9a\u4f4d\u548c\u89e3\u51b3DHCP\u76f8\u5173\u95ee\u9898\uff0c\u4ece\u800c\u786e\u4fdd\u7f51\u7edc\u7684\u5e73\u7a33\u8fd0\u884c\u3002 \u6807\u9898\uff1a\u5982\u4f55\u4f7f\u7528Linux\u547d\u4ee4\u67e5\u627eDHCP\u5305\uff1f \u5728\u7f51\u7edc\u7ba1\u7406\u4e2d\uff0cDHCP\uff08\u52a8\u6001\u4e3b\u673a\u914d\u7f6e\u534f\u8bae\uff09\u5145\u5f53\u7740\u91cd\u8981\u7684\u89d2\u8272\uff0c\u8d1f\u8d23\u4e3a\u7f51\u7edc\u8bbe\u5907\u5206\u914dIP\u5730\u5740\u548c\u5176\u4ed6\u76f8\u5173\u914d\u7f6e\u3002\u5f53\u7f51\u7edc\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u8ffd\u8e2a\u548c\u8bca\u65adDHCP\u5305\u662f\u4e00\u9879\u5fc5\u8981\u7684\u64cd\u4f5c\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u901a\u8fc7\u4f7f\u7528\u4e00\u4e9b\u547d\u4ee4\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u67e5\u627e\u3001\u6355\u83b7\u548c\u5206\u6790DHCP\u5305\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u547d\u4ee4\u6765\u5b9e\u73b0\u8fd9\u4e00\u76ee\u7684\u3002 1. \u4f7f\u7528tcpdump\u547d\u4ee4 tcpdump\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u7f51\u7edc\u5305\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u6355\u83b7\u548c\u5206\u6790\u7f51\u7edc\u6d41\u91cf\u3002\u4e0b\u9762\u662f\u4f7f\u7528tcpdump\u67e5\u627eDHCP\u5305\u7684\u547d\u4ee4\u793a\u4f8b\uff1a sudo tcpdump -i <interface> port 67 or port 68 -vv \u5176\u4e2d\uff0c-i\u9009\u9879\u7528\u4e8e\u6307\u5b9a\u7f51\u7edc\u63a5\u53e3\uff08\u5982eth0\u3001wlan0\u7b49\uff09\uff0cport 67 or port 68\u8868\u793a\u8fc7\u6ee4DHCP\u670d\u52a1\u5668\u7aef\u53e3\u548c\u5ba2\u6237\u7aef\u7aef\u53e3\uff0c-vv\u7528\u4e8e\u8f93\u51fa\u66f4\u8be6\u7ec6\u7684\u4fe1\u606f\u3002\u6267\u884c\u6b64\u547d\u4ee4\u5c06\u6355\u83b7\u7ecf\u8fc7\u6307\u5b9a\u63a5\u53e3\u7684\u6240\u6709DHCP\u5305\u3002 2. \u4f7f\u7528dhcpdump\u547d\u4ee4 dhcpdump\u662f\u53e6\u4e00\u4e2a\u7528\u4e8e\u5206\u6790DHCP\u5305\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u66f4\u76f4\u89c2\u5730\u663e\u793aDHCP\u4ea4\u4e92\u8fc7\u7a0b\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528dhcpdump\u6765\u67e5\u627eDHCP\u5305\u7684\u793a\u4f8b\u547d\u4ee4\uff1a sudo dhcpdump -i <interface> \u901a\u8fc7\u8fd9\u4e2a\u547d\u4ee4\uff0cdhcpdump\u5c06\u5b9e\u65f6\u663e\u793a\u7ecf\u8fc7\u6307\u5b9a\u63a5\u53e3\u7684DHCP\u4ea4\u4e92\u4fe1\u606f\uff0c\u5305\u62ecDHCP\u53d1\u73b0\u3001\u63d0\u4f9b\u3001\u8bf7\u6c42\u548c\u786e\u8ba4\u7b49\u9636\u6bb5\u7684\u6570\u636e\u5305\u3002 3. \u4f7f\u7528wireshark\u5de5\u5177 wireshark\u662f\u4e00\u4e2a\u6d41\u884c\u7684\u7f51\u7edc\u534f\u8bae\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u56fe\u5f62\u5316\u5730\u663e\u793a\u7f51\u7edc\u6570\u636e\u5305\u7684\u5185\u5bb9\u3002\u901a\u8fc7wireshark\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fc7\u6ee4\u5e76\u67e5\u770bDHCP\u5305\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u4e0b\u9762\u662f\u4f7f\u7528wireshark\u6355\u83b7DHCP\u5305\u7684\u6b65\u9aa4\uff1a \u6253\u5f00wireshark\uff0c\u5e76\u9009\u62e9\u8981\u76d1\u542c\u7684\u7f51\u7edc\u63a5\u53e3\u3002 \u5728\u8fc7\u6ee4\u680f\u4e2d\u8f93\u5165bootp\u6216dhcp\u4f5c\u4e3a\u8fc7\u6ee4\u6761\u4ef6\uff0c\u7136\u540e\u5f00\u59cb\u6355\u83b7\u3002 \u901a\u8fc7\u8fc7\u6ee4\u540e\u7684\u6570\u636e\u5305\u5217\u8868\u548c\u5305\u8be6\u60c5\uff0c\u53ef\u4ee5\u67e5\u770b\u5230DHCP\u4ea4\u4e92\u7684\u6574\u4e2a\u8fc7\u7a0b\u3002 \u4ee5\u4e0a\u662f\u51e0\u79cd\u5e38\u7528\u7684\u5728Linux\u7cfb\u7edf\u4e0b\u67e5\u627eDHCP\u5305\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u8fd9\u4e9b\u547d\u4ee4\u548c\u5de5\u5177\u7684\u7ed3\u5408\u4f7f\u7528\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u7f51\u7edc\u6545\u969c\u6392\u67e5\u548c\u76d1\u63a7\u5de5\u4f5c\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5bf9\u8bfb\u8005\u7406\u89e3\u548c\u5e94\u7528Linux\u547d\u4ee4\u67e5\u627eDHCP\u5305\u6709\u6240\u5e2e\u52a9\u3002 \u672c\u7bc7\u5173\u4e8e\u300a\u5728Linux\u7cfb\u7edf\u4e2d\u5982\u4f55\u5bfb\u627eDHCP\u6570\u636e\u5305\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01 \u5b9e\u73b0PHP\u65e5\u671f\u65f6\u95f4\u5411\u6570\u5b57\u8f6c\u6362\u7684\u6280\u5de7<\/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-51680","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/51680","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=51680"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/51680\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=51680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=51680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=51680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}