{"id":34435,"date":"2026-09-01T16:51:17","date_gmt":"2026-09-01T08:51:17","guid":{"rendered":"https:\/\/www.simcentric.com\/uncategorized-sc\/why-old-ip-access-persists-after-server-ip-change\/"},"modified":"2026-09-01T16:57:08","modified_gmt":"2026-09-01T08:57:08","slug":"why-old-ip-access-persists-after-server-ip-change","status":"publish","type":"post","link":"https:\/\/www.simcentric.com\/sc\/japan-dedicated-server-sc\/why-old-ip-access-persists-after-server-ip-change\/","title":{"rendered":"\u4e3a\u4ec0\u4e48\u670d\u52a1\u5668\u66f4\u6362 IP \u540e\uff0c\u65e7 IP \u4ecd\u7136\u53ef\u4ee5\u8bbf\u95ee"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=””]\u4f60\u521a\u521a\u628a\u670d\u52a1\u5668\u8fc1\u79fb<\/a>\u5230\u4e86\u4e00\u4e2a\u65b0\u7684 IP \u5730\u5740\uff0c\u4f46\u5374\u4ecd\u7136\u53ef\u4ee5\u901a\u8fc7\u65e7 IP \u8bbf\u95ee\u5b83\u3002\u8fd9\u4e2a\u4ee4\u4eba\u56f0\u60d1\u7684\u60c5\u51b5\u5176\u5b9e\u6bd4\u4f60\u60f3\u8c61\u4e2d\u66f4\u5e38\u89c1\u3002\u95ee\u9898\u6765\u81ea\u591a\u4e2a\u7f13\u5b58\u5c42\u548c\u914d\u7f6e\u5c42\u540c\u65f6\u53d1\u6325\u4f5c\u7528\u3002DNS \u7f13\u5b58<\/a>\u4f1a\u4fdd\u7559\u65e7\u8bb0\u5f55\uff1b\u672c\u5730\u7f51\u7edc\u7f13\u5b58\u4f1a\u8bb0\u4f4f\u4e4b\u524d\u7684\u6620\u5c04\uff1b\u6301\u4e45\u8fde\u63a5\u4f1a\u8ba9\u4f1a\u8bdd\u7ee7\u7eed\u5b58\u6d3b\uff1b\u670d\u52a1\u5668\u7aef\u8bbe\u7f6e\u4e5f\u53ef\u80fd\u4ecd\u7136\u5f15\u7528\u8fc7\u65f6\u7684\u5730\u5740\u3002\u6b63\u662f\u8fd9\u4e9b\u5c42\u5c42\u53e0\u52a0\u7684\u673a\u5236\uff0c\u5bfc\u81f4\u670d\u52a1\u5668\u66f4\u6362 IP \u540e\u65e7 IP \u8bbf\u95ee\u4ecd\u7136\u6301\u7eed\u3002\u7406\u89e3\u8fd9\u4e9b\u673a\u5236\uff0c\u80fd\u5e2e\u52a9\u4f60\u5feb\u901f\u5b9a\u4f4d\u5e76\u89e3\u51b3\u95ee\u9898\u3002\u4f60\u5c06\u5b66\u4f1a\u5982\u4f55\u5b9e\u9645\u6e05\u7406\u7f13\u5b58\u3001\u5220\u9664\u9648\u65e7\u6761\u76ee\u5e76\u6838\u5bf9\u914d\u7f6e\u3002\u8981\u5b9e\u73b0\u4e00\u6b21\u5e73\u6ed1\u8fc1\u79fb\uff0c\u5c31\u9700\u8981\u7cfb\u7edf\u6027\u5730\u9010\u5c42\u68c0\u67e5\u3002<\/p>\n

\u4e3a\u4ec0\u4e48\u65e7 IP \u8bbf\u95ee\u4ecd\u7136\u5b58\u5728\uff1aDNS \u7f13\u5b58\u4e0e\u4f20\u64ad<\/strong><\/h2>\n

\u670d\u52a1\u5668\u66f4\u6362 IP \u540e\u65e7 IP \u4ecd\u53ef\u8bbf\u95ee\uff0c\u6700\u5e38\u89c1\u7684\u5143\u51f6\u5c31\u662f DNS\u3002\u6bcf\u4e2a\u57df\u540d\u90fd\u4f9d\u8d56 DNS \u8bb0\u5f55\u628a\u6d41\u91cf\u6307\u5411\u6b63\u786e\u7684\u670d\u52a1\u5668\u3002\u8fd9\u4e9b\u8bb0\u5f55\u90fd\u4f1a\u5e26\u6709\u4e00\u4e2a TTL\uff08Time To Live\uff0c\u751f\u5b58\u65f6\u95f4\uff09\u503c\u3002TTL \u544a\u8bc9\u89e3\u6790\u5668\uff0c\u5728\u5411\u6743\u5a01 DNS \u670d\u52a1\u5668\u91cd\u65b0\u67e5\u8be2\u4e4b\u524d\uff0c\u8fd9\u6761\u5e94\u7b54\u53ef\u4ee5\u88ab\u7f13\u5b58\u591a\u4e45\u3002\u6bd4\u5982\uff0c\u4e00\u6761 TTL \u4e3a 3600 \u79d2\u7684\u8bb0\u5f55\uff0c\u5c31\u610f\u5473\u7740\u89e3\u6790\u5668\u6700\u591a\u4f1a\u628a\u8fd9\u4e2a\u7f13\u5b58 IP \u63d0\u4f9b\u7ed9\u5ba2\u6237\u7aef\u4f7f\u7528\u4e00\u5c0f\u65f6\u3002\u5728\u8fd9\u4e00\u5c0f\u65f6\u5185\uff0c\u5373\u4f7f\u6743\u5a01\u670d\u52a1\u5668\u4e0a\u7684\u8bb0\u5f55\u5df2\u7ecf\u53d8\u66f4\uff0c\u6301\u6709\u65e7\u503c\u7684\u5ba2\u6237\u7aef\u4e5f\u4e0d\u4f1a\u770b\u5230\u53d8\u5316\u3002DNS \u6ca1\u6709\u201c\u4e3b\u52a8\u63a8\u9001\u201d\u673a\u5236\uff0c\u53ea\u6709\u7b49\u7f13\u5b58\u8fc7\u671f\u540e\uff0c\u65e7\u8bb0\u5f55\u624d\u4f1a\u88ab\u6e05\u9664\u3002\u8fd9\u5c31\u662f\u4eba\u4eec\u5e38\u8bf4\u7684\u201cDNS \u4f20\u64ad\u201d\u3002<\/p>\n

DNS \u4f20\u64ad\uff1a\u7531\u4e8e\u5404\u7ea7\u9012\u5f52\u89e3\u6790\u5668\u7f13\u5b58\u4e86\u67e5\u8be2\u7ed3\u679c\uff0c\u53d8\u66f4\u53ef\u80fd\u9700\u8981\u6570\u5206\u949f\u5230\u5f88\u591a\u5c0f\u65f6\u624d\u80fd\u5b8c\u5168\u751f\u6548\u3002\u5373\u4f7f\u4f60\u5df2\u7ecf\u56de\u6eda\u6216\u4fee\u590d\u914d\u7f6e\uff0c\u7f13\u5b58\u7ed3\u679c\u4e5f\u53ef\u80fd\u4ecd\u7136\u6301\u7eed\u5b58\u5728\u3002<\/p><\/blockquote>\n

\u6d4f\u89c8\u5668\u548c\u64cd\u4f5c\u7cfb\u7edf\u7ea7\u522b\u7684 DNS \u7f13\u5b58<\/h3>\n

\u4f60\u7684\u6d4f\u89c8\u5668\u4f1a\u5728\u672c\u5730\u7f13\u5b58 DNS \u67e5\u8be2\u7ed3\u679c\u3002Chrome\u3001Firefox \u548c Edge \u90fd\u5404\u81ea\u7ef4\u62a4\u81ea\u5df1\u7684\u7f13\u5b58\u3002\u4f60\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e5f\u4f1a\u7ef4\u62a4\u4e00\u4e2a\u72ec\u7acb\u7684\u89e3\u6790\u5668\u7f13\u5b58\u3002\u8fd9\u4e9b\u5c42\u7ea7\u80fd\u591f\u63d0\u5347\u8bbf\u95ee\u901f\u5ea6\uff0c\u4f46\u5728\u8fc1\u79fb\u4e4b\u540e\uff0c\u4e5f\u4f1a\u628a\u65e7 IP \u5730\u5740\u201c\u56f0\u201d\u5728\u672c\u5730\u3002<\/p>\n

\u4f60\u53ef\u4ee5\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684 DNS \u7f13\u5b58\u6e05\u7406\u5de5\u5177\u6765\u5237\u65b0\u8fd9\u4e9b\u7f13\u5b58\uff0c\u8fd9\u6837\u53ef\u4ee5\u7acb\u5373\u6e05\u7a7a\u672c\u5730\u89e3\u6790\u5668\u7f13\u5b58\u3002\u4f60\u8fd8\u5e94\u8be5\u91cd\u542f\u6d4f\u89c8\u5668\uff0c\u4ee5\u6e05\u9664\u6d4f\u89c8\u5668\u5185\u90e8\u7f13\u5b58\u3002\u8bf7\u5f7b\u5e95\u5173\u95ed\u6240\u6709\u6d4f\u89c8\u5668\u7a97\u53e3\uff0c\u7136\u540e\u91cd\u65b0\u6253\u5f00\u6d4f\u89c8\u5668\uff0c\u518d\u5c1d\u8bd5\u8bbf\u95ee\u65b0\u7684 IP\u3002<\/p>\n

\u8def\u7531\u5668\u548c ISP \u7684\u9012\u5f52\u89e3\u6790\u5668<\/h3>\n

\u4f60\u7684\u5bb6\u7528\u8def\u7531\u5668\u901a\u5e38\u4f1a\u5145\u5f53 DNS \u8f6c\u53d1\u5668\u3002\u5b83\u4f1a\u4e3a\u7f51\u7edc\u4e2d\u7684\u6240\u6709\u8bbe\u5907\u7f13\u5b58 DNS \u5e94\u7b54\uff0c\u8fd9\u4e2a\u7f13\u5b58\u53ef\u80fd\u4f1a\u628a\u65e7 IP \u4fdd\u7559\u6570\u5c0f\u65f6\u751a\u81f3\u6570\u5929\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u65ad\u7535\u91cd\u542f\u6765\u6e05\u9664\u5b83\u3002<\/p>\n

    \n
  1. \u62d4\u6389\u8def\u7531\u5668\u7535\u6e90\u7ebf\u3002<\/li>\n
  2. \u7b49\u5f85 30 \u79d2\u3002<\/li>\n
  3. \u91cd\u65b0\u63d2\u4e0a\u7535\u6e90\u3002<\/li>\n
  4. \u7b49\u5f85\u5176\u5b8c\u5168\u542f\u52a8\uff082-3 \u5206\u949f\uff09\u3002<\/li>\n<\/ol>\n

    \u4f60\u4e5f\u53ef\u4ee5\u901a\u8fc7\u7ba1\u7406\u9762\u677f\u6765\u64cd\u4f5c\u3002\u6253\u5f00\u6d4f\u89c8\u5668\u5e76\u8bbf\u95ee\u8def\u7531\u5668\u7684 IP \u5730\u5740\uff0c\u4f7f\u7528\u7ba1\u7406\u5458\u8d26\u53f7\u767b\u5f55\uff0c\u627e\u5230 DHCP\u3001\u7f51\u7edc\u6216 DNS \u8bbe\u7f6e\u3002\u5bfb\u627e\u7c7b\u4f3c Release\/Renew\u3001Clear DNS Cache \u6216 Restart DNS \u7684\u9009\u9879\uff0c\u7136\u540e\u5e94\u7528\u66f4\u6539\u3002<\/p>\n

    \u9664\u4e86\u4f60\u7684\u8def\u7531\u5668\u4e4b\u5916\uff0c\u4e92\u8054\u7f51\u670d\u52a1\u63d0\u4f9b\u5546\uff08ISP\uff09\u4e5f\u8fd0\u884c\u7740\u9012\u5f52\u89e3\u6790\u5668\u3002\u8fd9\u4e9b\u670d\u52a1\u5668\u4f1a\u4e3a\u6210\u5343\u4e0a\u4e07\u7684\u7528\u6237\u7f13\u5b58 DNS \u8bb0\u5f55\u3002\u4f60\u65e0\u6cd5\u81ea\u5df1\u6e05\u9664\u8fd9\u4e9b\u7f13\u5b58\uff0c\u53ea\u80fd\u7b49\u5f85 TTL \u81ea\u7136\u8fc7\u671f\u3002\u65e7\u8bb0\u5f55\u4e0a\u8bbe\u7f6e\u4e86\u8f83\u957f\u7684 TTL\uff0c\u6b63\u662f\u5f88\u591a\u4eba\u89c9\u5f97 DNS \u4f20\u64ad\u53ef\u80fd\u9700\u8981 48 \u5c0f\u65f6\u7684\u539f\u56e0\u3002<\/p>\n

    \u8fd9\u4e2a\u95ee\u9898\u5176\u5b9e\u53ef\u4ee5\u5728\u8fc1\u79fb\u524d\u9884\u5148\u63a7\u5236\u3002\u63d0\u524d\u51e0\u5929\u628a TTL \u964d\u4f4e\uff0c\u7b49\u5f85\u65e7 TTL \u5728\u5404\u5904\u90fd\u8fc7\u671f\u4e4b\u540e\uff0c\u518d\u8fdb\u884c IP \u53d8\u66f4\u3002\u8fd9\u6837\u7f13\u5b58\u5c31\u80fd\u5728\u51e0\u5206\u949f\u5185\u5237\u65b0\u5b8c\u6210\u3002\u4e4b\u540e\u518d\u628a TTL \u8c03\u9ad8\uff0c\u4ee5\u51cf\u5c11 DNS \u67e5\u8be2\u8d1f\u8f7d\u3002\u8fd9\u4e2a\u7b56\u7565\u80fd\u6709\u6548\u907f\u514d\u5728\u6574\u6279\u7528\u6237\u4e2d\u90fd\u51fa\u73b0\u201c\u65e7 IP \u4ecd\u7136\u53ef\u8bbf\u95ee\u201d\u7684\u607c\u4eba\u60c5\u51b5\u3002<\/p>\n

    \u5373\u4f7f\u670d\u52a1\u5668\u79df\u7528\u672c\u8eab\u8fd0\u884c\u6b63\u5e38\uff0cDNS \u95ee\u9898\u4ecd\u53ef\u80fd\u4e2d\u65ad\u4f60\u7684\u7f51\u7ad9\u670d\u52a1\u3002\u4e00\u4e2a\u914d\u7f6e\u9519\u8bef\u7684\u8bb0\u5f55\u5c31\u53ef\u80fd\u5bfc\u81f4\u957f\u65f6\u95f4\u5b95\u673a\u548c\u5168\u7403\u8303\u56f4\u7684\u8bbf\u95ee\u5931\u8d25\u3002\u6301\u7eed\u76d1\u63a7 DNS \u4f20\u64ad\u60c5\u51b5\u548c TTL \u8bbe\u7f6e\uff0c\u6709\u52a9\u4e8e\u4f60\u53ca\u65e9\u53d1\u73b0\u95ee\u9898\u3002<\/p>\n

    \u7f51\u7edc\u5c42\u7f13\u5b58\uff1aARP \u548c DHCP \u79df\u7ea6<\/strong><\/h2>\n

    DNS \u5e76\u4e0d\u662f\u552f\u4e00\u4f1a\u8bb0\u4f4f\u65e7\u5730\u5740\u7684\u5c42\u3002\u4f60\u7684\u672c\u5730\u7f51\u7edc\u4e5f\u4f1a\u4fdd\u5b58\u8fc7\u65f6\u7684\u6620\u5c04\u4fe1\u606f\u3002\u4e3b\u8981\u6709\u4e24\u79cd\u673a\u5236\u4f1a\u5bfc\u81f4\u8fd9\u79cd\u60c5\u51b5\uff1aARP \u7f13\u5b58\u548c DHCP \u79df\u7ea6\u3002\u5373\u4f7f\u4f60\u5df2\u7ecf\u66f4\u6539\u4e86\u670d\u52a1\u5668\u5730\u5740\uff0c\u5b83\u4eec\u4ecd\u53ef\u80fd\u8ba9\u65e7 IP \u8bbf\u95ee\u7ee7\u7eed\u5b58\u5728\u5f88\u957f\u65f6\u95f4\u3002<\/p>\n

    ARP \u7f13\u5b58\u6761\u76ee\u4e0e\u9759\u6001\u6620\u5c04<\/h3>\n

    \u5730\u5740\u89e3\u6790\u534f\u8bae\uff08ARP\uff09\u7528\u4e8e\u5c06 IP \u5730\u5740\u6620\u5c04\u5230\u7269\u7406 MAC \u5730\u5740\u3002\u7f51\u7edc\u4e2d\u7684\u6bcf\u53f0\u8bbe\u5907\u90fd\u4f1a\u7ef4\u62a4\u4e00\u4e2a ARP \u7f13\u5b58\u3002\u8fd9\u4e2a\u7f13\u5b58\u4f1a\u544a\u8bc9\u8def\u7531\u5668\uff0c\u5bf9\u4e8e\u67d0\u4e2a IP \u5730\u5740\uff0c\u6570\u636e\u5305\u5e94\u8be5\u53d1\u7ed9\u54ea\u4e00\u5757\u786c\u4ef6\u3002\u5f53\u4f60\u66f4\u6362\u670d\u52a1\u5668 IP \u65f6\uff0c\u65e7\u7684 ARP \u6761\u76ee\u53ef\u80fd\u4ecd\u7136\u6307\u5411\u65e7\u786c\u4ef6\uff0c\u5bfc\u81f4\u6d41\u91cf\u7ee7\u7eed\u53d1\u5f80\u9519\u8bef\u7684\u76ee\u6807\u3002<\/p>\n

    \u4f60\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u7b80\u5355\u547d\u4ee4\u6765\u67e5\u770b ARP \u7f13\u5b58\u3002\u4e0b\u8868\u5217\u51fa\u4e86\u6700\u5e38\u7528\u7684\u51e0\u4e2a\uff1a<\/p>\n

    \n\n\n\n\n<\/colgroup>\n\n\n\n\n\n
    \u547d\u4ee4<\/th>\n\u7528\u9014<\/th>\n\u793a\u4f8b<\/th>\n<\/tr>\n
    arp -a<\/code><\/td>\n\u67e5\u770b\u6240\u6709 ARP \u7f13\u5b58\u6761\u76ee<\/td>\narp -a<\/code><\/td>\n<\/tr>\n
    arp -d <ip><\/code><\/td>\n\u5220\u9664\u6307\u5b9a\u7684 ARP \u6761\u76ee<\/td>\narp -d 192.168.1.100<\/code><\/td>\n<\/tr>\n
    sudo ip neigh flush all<\/code><\/td>\n\u6e05\u7a7a\u6574\u4e2a ARP \u7f13\u5b58\uff08Linux\uff09<\/td>\nsudo ip neigh flush all<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    \u9759\u6001 ARP \u6761\u76ee\u4f1a\u9020\u6210\u6700\u987d\u56fa\u7684\u95ee\u9898\u3002\u9759\u6001\u6620\u5c04\u4f1a\u8986\u76d6\u52a8\u6001\u66f4\u65b0\uff0c\u5373\u4f7f\u670d\u52a1\u5668\u5df2\u7ecf\u8fc1\u79fb\uff0c\u8def\u7531\u5668\u4ecd\u4f1a\u7ee7\u7eed\u4f7f\u7528\u65e7\u7684 MAC \u5730\u5740\u3002\u4f60\u5fc5\u987b\u624b\u52a8\u5220\u9664\u8fd9\u4e9b\u6761\u76ee\uff0c\u7136\u540e\u8ba9\u8def\u7531\u5668\u91cd\u65b0\u52a8\u6001\u5efa\u7acb\u90bb\u63a5\u5173\u7cfb\uff0c\u624d\u80fd\u6062\u590d\u6b63\u786e\u8f6c\u53d1\u3002<\/p>\n

    DHCP \u79df\u7ea6\u51b2\u7a81\u4e0e\u9648\u65e7\u5206\u914d<\/h3>\n

    DHCP \u901a\u8fc7\u201c\u79df\u7ea6\u201d\u673a\u5236\u5206\u914d IP \u5730\u5740\u3002\u6bcf\u4e2a\u79df\u7ea6\u90fd\u5e26\u6709\u79df\u671f\u3001\u5f00\u59cb\u65f6\u95f4\u3001\u7ed3\u675f\u65f6\u95f4\u4ee5\u53ca\u5ba2\u6237\u7aef\u7684 MAC \u5730\u5740\u3002DHCP \u670d\u52a1\u5668\u4f1a\u628a\u8fd9\u4e9b\u4fe1\u606f\u4fdd\u5b58\u5728\u79df\u7ea6\u6570\u636e\u5e93\u4e2d\u3002\u5728 Linux \u4e0a\uff0c\u4f60\u901a\u5e38\u53ef\u4ee5\u5728 \/var\/lib\/dhcp\/dhcpd.leases<\/code> \u627e\u5230\u5b83\u3002<\/p>\n

    \u79df\u7ea6\u7eed\u79df\u8fc7\u7a0b\u672c\u8eab\u4e5f\u53ef\u80fd\u8ba9\u65e7\u5730\u5740\u6ede\u7559\u3002\u5f53\u670d\u52a1\u5668\u53d1\u73b0\u4e00\u4e2a\u6b63\u5728\u7eed\u79df\u7684\u5730\u5740\u73b0\u5728\u5df2\u7ecf\u5c5e\u4e8e\u53e6\u4e00\u53f0\u4e3b\u673a\u65f6\uff0c\u5b83\u4f1a\u53d1\u9001 DHCPNAK \u6d88\u606f\u3002\u7136\u800c\uff0c\u5b83\u4f1a\u6545\u610f\u4fdd\u7559\u73b0\u6709\u79df\u7ea6\u3002\u8fd9\u662f\u4e3a\u4e86\u9632\u6b62\u4e22\u5305\u5e26\u6765\u95ee\u9898\u3002\u5982\u679c\u5728\u4e0d\u7a33\u5b9a\u7f51\u7edc\u4e2d DHCPNAK \u4e22\u5931\uff0c\u5ba2\u6237\u7aef\u4f1a\u91cd\u65b0\u53d1\u9001\u8bf7\u6c42\uff0c\u800c\u670d\u52a1\u5668\u4ecd\u9700\u8981\u4fdd\u7559\u8fd9\u4efd\u79df\u7ea6\u4ee5\u5904\u7406\u90a3\u6b21\u91cd\u4f20\u3002\u53ea\u6709\u5f53\u5ba2\u6237\u7aef\u771f\u6b63\u6536\u5230 DHCPNAK \u5e76\u91cd\u65b0\u53d1\u8d77\u65b0\u7684\u53d1\u73b0\u6d41\u7a0b\u540e\uff0c\u670d\u52a1\u5668\u624d\u4f1a\u5220\u9664\u65e7\u79df\u7ea6\u3002<\/p>\n

    \u6b63\u56e0\u4e3a\u6709\u8fd9\u4e2a\u5b89\u5168\u673a\u5236\uff0c\u65e7 IP \u8bbf\u95ee\u53ef\u80fd\u4f1a\u5728\u7eed\u79df\u63e1\u624b\u8fc7\u7a0b\u4e2d\u7ee7\u7eed\u5b58\u5728\u3002\u4f60\u53ef\u4ee5\u5728\u8fc1\u79fb\u524d\u624b\u52a8\u91ca\u653e\u79df\u7ea6\u6765\u52a0\u5feb\u5904\u7406\u3002\u5728\u5ba2\u6237\u7aef\u4e0a\uff0c\u5148\u91ca\u653e\u5f53\u524d\u79df\u7ea6\uff0c\u518d\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u7684 DHCP \u5ba2\u6237\u7aef\u5de5\u5177\u91cd\u65b0\u7533\u8bf7\u65b0\u79df\u7ea6\u3002\u8fd9\u6837\u53ef\u4ee5\u5f3a\u5236\u5b8c\u6210\u4e00\u6b21\u5e72\u51c0\u7684\u5207\u6362\uff0c\u907f\u514d\u65e7\u5730\u5740\u7ee7\u7eed\u6ede\u7559\u5728 DHCP \u6570\u636e\u5e93\u4e2d\u3002<\/p>\n

    \u672c\u5730 Hosts \u6587\u4ef6\u4e0e\u6301\u4e45\u8fde\u63a5<\/strong><\/h2>\n

    \u4f60\u7684\u8ba1\u7b97\u673a\u4e0a\u8fd8\u6709\u53e6\u4e00\u5c42\u5730\u5740\u4fe1\u606f\uff0c\u800c\u4e14\u5b83\u4f1a\u5b8c\u5168\u7ed5\u8fc7 DNS\u3002Hosts \u6587\u4ef6\u53ef\u4ee5\u628a\u57df\u540d\u76f4\u63a5\u6620\u5c04\u5230 IP \u5730\u5740\u3002\u8be5\u6587\u4ef6\u4f4d\u4e8e\u7cfb\u7edf\u914d\u7f6e\u76ee\u5f55\u4e2d\uff1b\u5728 Linux \u548c macOS \u4e0a\u901a\u5e38\u662f \/etc\/hosts<\/code>\uff0c\u800c\u5728 Windows \u4e0a\u5219\u4f4d\u4e8e\u7cfb\u7edf\u76ee\u5f55\u4e0b\u3002\u8fd9\u4e2a\u6587\u4ef6\u7684\u4f18\u5148\u7ea7\u9ad8\u4e8e DNS \u89e3\u6790\uff0c\u7cfb\u7edf\u4f1a\u5148\u68c0\u67e5\u5b83\uff0c\u518d\u53bb\u67e5\u8be2\u4efb\u4f55 DNS \u670d\u52a1\u5668\u3002\u8fd9\u4e2a\u89e3\u6790\u987a\u5e8f\u6765\u81ea nsswitch.conf<\/code> \u6587\u4ef6\uff0c\u901a\u5e38\u8bbe\u7f6e\u4e3a hosts: file dns<\/code>\uff0c\u610f\u601d\u5c31\u662f\uff1a\u53ea\u8981 Hosts \u6587\u4ef6\u91cc\u6709\u8bb0\u5f55\uff0c\u5b83\u5c31\u59cb\u7ec8\u4f18\u5148\u751f\u6548\u3002<\/p>\n

    Hosts \u6587\u4ef6\u4e2d\u7684\u9648\u65e7\u6761\u76ee<\/h3>\n

    \u8fd9\u4e2a\u6587\u4ef6\u91cc\u54ea\u6015\u53ea\u6709\u4e00\u884c\u8fc7\u65f6\u8bb0\u5f55\uff0c\u4e5f\u4f1a\u8ba9\u8fc1\u79fb\u5b8c\u6210\u4e4b\u540e\u65e7 IP \u8bbf\u95ee\u4f9d\u7136\u6301\u7eed\u5b58\u5728\u3002\u4e5f\u8bb8\u4f60\u51e0\u4e2a\u6708\u524d\u4e3a\u4e86\u6d4b\u8bd5\u52a0\u8fc7\u4e00\u6761\u8bb0\u5f55\uff0c\u800c\u5b83\u81f3\u4eca\u4ecd\u7136\u628a\u4f60\u7684\u57df\u540d\u6307\u5411\u65e7\u670d\u52a1\u5668\u5730\u5740\u3002\u6bcf\u6b21\u8bf7\u6c42\u90fd\u4f1a\u5148\u8bfb\u53d6\u8fd9\u4e00\u884c\uff0c\u4ece\u800c\u6839\u672c\u4e0d\u4f1a\u8d70 DNS \u67e5\u8be2\u3002<\/p>\n

    \u8bf7\u7528\u6587\u672c\u7f16\u8f91\u5668\u6253\u5f00 Hosts \u6587\u4ef6\uff0c\u67e5\u627e\u6240\u6709\u5305\u542b\u4f60\u57df\u540d\u7684\u884c\u3002\u5220\u9664\u8fd9\u4e9b\u6761\u76ee\uff0c\u6216\u8005\u628a\u5b83\u4eec\u66f4\u65b0\u4e3a\u65b0\u7684 IP \u5730\u5740\u3002\u4fdd\u5b58\u6587\u4ef6\u540e\uff0c\u518d\u6e05\u7406\u6d4f\u89c8\u5668\u7f13\u5b58\u3002\u8fd9\u4e2a\u4fee\u6539\u4f1a\u7acb\u5373\u751f\u6548\uff0c\u65e0\u9700\u91cd\u542f\u7cfb\u7edf\u3002<\/p>\n

    \u8fd9\u91cc\u8fd8\u5b58\u5728\u5b89\u5168\u9690\u60a3\u3002\u653b\u51fb\u8005\u53ef\u80fd\u4f1a\u4fee\u6539\u8fd9\u4e2a\u6587\u4ef6\uff0c\u628a\u6d41\u91cf\u91cd\u5b9a\u5411\u5230\u6076\u610f\u5730\u5740\uff0c\u8fd9\u79cd\u884c\u4e3a\u88ab\u79f0\u4e3a Hosts \u6587\u4ef6\u6295\u6bd2\u3002\u6709\u4e9b\u7528\u6237\u4e3a\u4e86\u9632\u6b62\u7be1\u6539\uff0c\u751a\u81f3\u4f1a\u76f4\u63a5\u5220\u9664 Hosts \u6587\u4ef6\uff0c\u4f46\u8fd9\u4f1a\u7834\u574f localhost \u7684\u89e3\u6790\u3002\u56de\u73af\u5730\u5740 127.0.0.1 \u548c ::1 \u6b63\u662f\u901a\u8fc7\u8fd9\u4e2a\u6587\u4ef6\u6620\u5c04\u5230 localhost \u7684\u3002\u5982\u679c\u6ca1\u6709\u5b83\uff0c\u800c DNS \u53c8\u65e0\u6cd5\u89e3\u6790 localhost\uff0c\u90a3\u4e48\u672c\u5730\u670d\u52a1\u53ef\u80fd\u5c31\u4f1a\u51fa\u95ee\u9898\u3002<\/p>\n

    TCP Keep-Alive \u4e0e\u73b0\u6709\u4f1a\u8bdd<\/h3>\n

    \u73b0\u6709\u7f51\u7edc\u8fde\u63a5\u5728 IP \u53d8\u66f4\u4e4b\u540e\u4ecd\u6709\u53ef\u80fd\u7ee7\u7eed\u5b58\u6d3b\u3002TCP \u4f1a\u8bdd\u53ef\u4ee5\u901a\u8fc7 Keep-Alive \u673a\u5236\u4fdd\u6301\u6253\u5f00\u72b6\u6001\uff0c\u5373\u4fbf\u6682\u65f6\u6ca1\u6709\u6570\u636e\u4f20\u8f93\uff0c\u8fd9\u4e9b\u5468\u671f\u6027\u63a2\u6d4b\u4e5f\u4f1a\u7ef4\u6301\u8fde\u63a5\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u5728\u8fc1\u79fb\u524d\u5efa\u7acb\u7684 SSH \u4f1a\u8bdd\u6216\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u53ef\u80fd\u4ecd\u7136\u5728\u4f7f\u7528\u65e7\u5730\u5740\u3002<\/p>\n

    \u4f60\u53ef\u4ee5\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u7f51\u7edc\u8fde\u63a5\u76d1\u63a7\u5de5\u5177\u6765\u8bc6\u522b\u8fd9\u4e9b\u6b8b\u7559\u8fde\u63a5\u3002\u67e5\u627e\u6240\u6709\u5230\u65e7 IP \u5730\u5740\u7684\u5df2\u5efa\u7acb\u8fde\u63a5\uff0c\u5e76\u8bb0\u4e0b\u5bf9\u5e94\u7684\u8fdb\u7a0b ID\u3002\u7136\u540e\u7ec8\u6b62\u8fd9\u4e9b\u8fdb\u7a0b\uff0c\u6216\u8005\u91cd\u542f\u62e5\u6709\u8fd9\u4e9b\u8fde\u63a5\u7684\u670d\u52a1\u3002\u8fd9\u6837\u5c31\u80fd\u5f3a\u5236\u65b0\u8fde\u63a5\u6539\u7528\u66f4\u65b0\u540e\u7684\u5730\u5740\u3002<\/p>\n

    \u91cd\u542f\u5e94\u7528\u7a0b\u5e8f\u901a\u5e38\u662f\u6700\u5e72\u51c0\u7684\u89e3\u51b3\u65b9\u6848\u3002\u505c\u6b62\u670d\u52a1\u3001\u5173\u95ed\u5ba2\u6237\u7aef\uff0c\u7136\u540e\u91cd\u65b0\u542f\u52a8\u5168\u90e8\u7ec4\u4ef6\u3002\u65b0\u7684\u8fde\u63a5\u4f1a\u91cd\u65b0\u67e5\u8be2 DNS \u548c\u8def\u7531\u8868\uff0c\u4ece\u800c\u6b63\u786e\u4f7f\u7528\u65b0\u7684 IP\uff0c\u4e0d\u518d\u6df7\u6dc6\u3002<\/p>\n

    \u670d\u52a1\u5668\u7aef\u914d\u7f6e\u4e0e IP \u51b2\u7a81<\/strong><\/h2>\n

    \u670d\u52a1\u5668\u81ea\u8eab\u7684\u914d\u7f6e\u6587\u4ef6\u91cc\uff0c\u4e5f\u53ef\u80fd\u4ecd\u7136\u4fdd\u7559\u7740\u65e7\u5730\u5740\u3002\u50cf Apache \u548c Nginx \u8fd9\u6837\u7684 Web \u670d\u52a1\u5668\u4f1a\u4f7f\u7528\u865a\u62df\u4e3b\u673a\u914d\u7f6e\u5757\u6765\u8def\u7531\u8bf7\u6c42\uff0c\u800c\u8fd9\u4e9b\u914d\u7f6e\u5757\u4e2d\u53ef\u80fd\u5305\u542b\u6307\u5b9a\u76d1\u542c IP \u7684\u6307\u4ee4\u3002\u5982\u679c\u4f60\u5df2\u7ecf\u4fee\u6539\u4e86\u670d\u52a1\u5668 IP\uff0c\u4f46\u8fd9\u4e9b\u8bbe\u7f6e\u6ca1\u6709\u540c\u6b65\u66f4\u65b0\uff0c\u90a3\u4e48\u670d\u52a1\u5668\u4ecd\u53ef\u80fd\u7ee7\u7eed\u5728\u65e7\u5730\u5740\u4e0a\u63a5\u53d7\u6d41\u91cf\u3002\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32\u4e5f\u4f1a\u5e26\u6765\u7c7b\u4f3c\u95ee\u9898\u3002\u5e94\u7528\u7a0b\u5e8f\u4f1a\u628a\u8fd9\u4e9b\u5b57\u7b26\u4e32\u5b58\u50a8\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u800c PHP \u6216 Python \u6587\u4ef6\u4e2d\u786c\u7f16\u7801\u7684\u65e7 IP\uff0c\u4f1a\u628a\u6240\u6709\u67e5\u8be2\u7ee7\u7eed\u53d1\u5f80\u9519\u8bef\u4e3b\u673a\u3002<\/p>\n

    \u8fc1\u79fb\u4e4b\u540e\uff0c\u4f60\u5fc5\u987b\u5168\u9762\u5ba1\u67e5\u8fd9\u4e9b\u6587\u4ef6\u3002\u5728\u6574\u53f0\u670d\u52a1\u5668\u4e0a\u641c\u7d22\u65e7 IP\uff0c\u4f7f\u7528\u6587\u672c\u641c\u7d22\u5de5\u5177\u627e\u51fa\u6bcf\u4e00\u5904\u5f15\u7528\uff0c\u5e76\u628a\u6240\u6709\u51fa\u73b0\u4f4d\u7f6e\u90fd\u66f4\u65b0\u4e3a\u65b0\u5730\u5740\u3002\u4e4b\u540e\u91cd\u542f Web \u670d\u52a1\u5668\u548c\u6570\u636e\u5e93\u670d\u52a1\uff0c\u786e\u4fdd\u6240\u6709\u7ec4\u4ef6\u90fd\u7ed1\u5b9a\u5230\u6b63\u786e\u7684\u63a5\u53e3\u4e0a\u3002<\/p>\n

    \u865a\u62df\u4e3b\u673a\u4e0e\u670d\u52a1\u7ed1\u5b9a<\/h3>\n

    Web \u670d\u52a1\u5668\u914d\u7f6e\u6587\u4ef6\uff0c\u4f8b\u5982 Apache \u6216 Nginx \u7684\u914d\u7f6e\uff0c\u53ef\u80fd\u5305\u542b\u6307\u5b9a IP \u5730\u5740\u7684\u865a\u62df\u4e3b\u673a\u5b9a\u4e49\u3002\u82e5\u67d0\u6761\u6307\u4ee4\u4ecd\u7136\u5199\u7740\u65e7 IP\uff0c\u670d\u52a1\u5668\u5c31\u53ef\u80fd\u65e0\u6cd5\u5728\u65b0\u5730\u5740\u4e0a\u63a5\u53d7\u8fde\u63a5\u3002\u4f60\u5fc5\u987b\u7f16\u8f91\u8fd9\u4e9b\u6307\u4ee4\uff0c\u5e76\u5c06\u65e7 IP \u66ff\u6362\u4e3a\u65b0 IP\u3002<\/p>\n

    \u670d\u52a1\u7ed1\u5b9a\u95ee\u9898\u5e76\u4e0d\u53ea\u9650\u4e8e Web \u670d\u52a1\u5668\u3002\u4f60\u8fd8\u5e94\u68c0\u67e5 SSH\u3001MySQL \u4ee5\u53ca\u5176\u4ed6\u670d\u52a1\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u662f\u5426\u5b58\u5728\u4e0e IP \u7ed1\u5b9a\u76f8\u5173\u7684\u8bbe\u7f6e\uff0c\u5e76\u9010\u4e00\u66f4\u65b0\u3002<\/p>\n

    IP \u5730\u5740\u51b2\u7a81\u4e0e\u8fc1\u79fb\u5de5\u5177\u9057\u7559\u9879<\/h3>\n

    \u5f53\u540c\u4e00\u7f51\u7edc\u4e2d\u7684\u4e24\u53f0\u8bbe\u5907\u4f7f\u7528\u76f8\u540c\u5730\u5740\u65f6\uff0c\u5c31\u4f1a\u53d1\u751f IP \u51b2\u7a81\u3002\u5982\u679c\u53e6\u4e00\u53f0\u673a\u5668\u5df2\u7ecf\u5360\u7528\u4e86\u4f60\u7684\u65b0 IP\uff0c\u670d\u52a1\u5668\u5c31\u53ef\u80fd\u65e0\u6cd5\u7ed1\u5b9a\u5230\u8be5\u5730\u5740\u3002\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u62a5\u544a\u9519\u8bef\uff0c\u800c\u670d\u52a1\u5219\u53ef\u80fd\u56de\u9000\u5230\u65e7 IP \u4e0a\u76d1\u542c\u3002\u8fd9\u79cd\u60c5\u51b5\u4f1a\u8ba9\u66f4\u6362 IP \u540e\u65e7 IP \u8bbf\u95ee\u4ecd\u7136\u6301\u7eed\u3002\u8fc1\u79fb\u524d\u5e94\u5148\u786e\u8ba4\u65b0 IP \u6ca1\u6709\u88ab\u5360\u7528\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528 arp<\/code> \u68c0\u67e5\u662f\u5426\u5df2\u6709\u8bbe\u5907\u5bf9\u8be5\u5730\u5740\u4f5c\u51fa\u54cd\u5e94\u3002<\/p>\n

    \u6709\u4e9b\u8fc1\u79fb\u5de5\u5177\u4f1a\u81ea\u52a8\u66f4\u65b0\u5927\u91cf\u8bbe\u7f6e\uff0c\u4f46\u5b83\u4eec\u901a\u5e38\u65e0\u6cd5\u8986\u76d6\u6240\u6709\u5f15\u7528\u3002\u81ea\u5b9a\u4e49\u914d\u7f6e\u3001cron \u4efb\u52a1\u4ee5\u53ca\u5e94\u7528\u7a0b\u5e8f\u8bbe\u7f6e\u4e2d\uff0c\u53ef\u80fd\u4ecd\u7136\u4fdd\u7559\u65e7 IP\u3002\u56e0\u6b64\uff0c\u624b\u52a8\u6e05\u7406\u4ecd\u7136\u662f\u5fc5\u8981\u6b65\u9aa4\u3002\u8bf7\u5728\u6574\u4e2a\u6587\u4ef6\u7cfb\u7edf\u4e2d\u641c\u7d22\u65e7\u5730\u5740\uff0c\u5e76\u66f4\u65b0\u6240\u6709\u5f15\u7528\u5b83\u7684\u6587\u4ef6\u3002<\/p>\n

    \n
    <\/div>\n<\/div>\n

    \u65e7 IP \u8bbf\u95ee\u4e4b\u6240\u4ee5\u6301\u7eed\u5b58\u5728\uff0c\u662f\u56e0\u4e3a\u591a\u4e2a\u5c42\u9762\u5171\u540c\u4f5c\u7528\u3002DNS \u7f13\u5b58\u4fdd\u7559\u4e86\u8fc7\u671f\u8bb0\u5f55\uff1bARP \u8868\u8bb0\u4f4f\u4e86\u65e7\u7684\u786c\u4ef6\u6620\u5c04\uff1bDHCP \u79df\u7ea6\u5ef6\u7eed\u4e86\u65e7\u5206\u914d\uff1bHosts \u6587\u4ef6\u6761\u76ee\u4f1a\u8986\u76d6\u4e00\u5207\uff1b\u6301\u4e45 TCP \u4f1a\u8bdd\u5728\u8fc1\u79fb\u540e\u4ecd\u53ef\u7ee7\u7eed\uff1b\u670d\u52a1\u5668\u914d\u7f6e\u6587\u4ef6\u4e5f\u53ef\u80fd\u8fd8\u5728\u5f15\u7528\u65e7\u5730\u5740\u3002<\/p>\n

    \u5927\u591a\u6570\u539f\u56e0\u90fd\u80fd\u8f83\u5feb\u89e3\u51b3\u3002\u4f60\u53ef\u4ee5\u7528\u7b80\u5355\u547d\u4ee4\u5237\u65b0 DNS \u7f13\u5b58\uff1b\u53ef\u4ee5\u4f7f\u7528 arp -d<\/code> \u6e05\u9664 ARP \u6761\u76ee\uff1b\u53ef\u4ee5\u624b\u52a8\u91ca\u653e DHCP \u79df\u7ea6\uff1b\u53ef\u4ee5\u76f4\u63a5\u7f16\u8f91 Hosts \u6587\u4ef6\uff1b\u4e5f\u53ef\u4ee5\u901a\u8fc7\u91cd\u542f\u670d\u52a1\u6765\u7ec8\u6b62\u6b8b\u7559\u8fde\u63a5\u3002<\/p>\n

    \u4e3a\u4e86\u8ba9\u8fc1\u79fb\u66f4\u52a0\u987a\u5229\uff0c\u6700\u597d\u63d0\u524d\u89c4\u5212\u3002\u8bf7\u5728\u53d8\u66f4\u524d\u51e0\u5929\u964d\u4f4e DNS TTL\uff0c\u4e3b\u52a8\u6e05\u7406\u7f13\u5b58\uff0c\u5e76\u5ba1\u8ba1\u6240\u6709\u914d\u7f6e\u6587\u4ef6\uff0c\u67e5\u627e\u662f\u5426\u5b58\u5728\u786c\u7f16\u7801\u5730\u5740\u3002<\/p>\n

    \u7406\u89e3\u8fd9\u4e9b\u673a\u5236\u4e4b\u540e\uff0c\u539f\u672c\u4ee4\u4eba\u6cae\u4e27\u7684\u95ee\u9898\u5c31\u4f1a\u53d8\u6210\u4e00\u4efd\u53ef\u6267\u884c\u7684\u6392\u67e5\u6e05\u5355\u3002\u73b0\u5728\uff0c\u4f60\u5df2\u7ecf\u638c\u63e1\u4e86\u9010\u5c42\u8bca\u65ad\u5e76\u81ea\u4fe1\u4fee\u590d\u95ee\u9898\u6240\u9700\u7684\u5de5\u5177\u3002<\/p><\/blockquote>\n

    \u5e38\u89c1\u95ee\u9898<\/strong><\/h2>\n

    DNS \u4f20\u64ad\u5b9e\u9645\u9700\u8981\u591a\u4e45\uff1f<\/h3>\n

    DNS \u4f20\u64ad\u65f6\u95f4\u5b8c\u5168\u53d6\u51b3\u4e8e TTL \u503c\u3002\u4e00\u6761 TTL \u4e3a 3600 \u79d2\uff08\u4e00\u5c0f\u65f6\uff09\u7684\u8bb0\u5f55\uff0c\u901a\u5e38\u4f1a\u5728\u4e00\u5c0f\u65f6\u5185\u6e05\u9664\uff1b\u800c TTL \u8f83\u957f\u7684\u8bb0\u5f55\uff0c\u5219\u53ef\u80fd\u6301\u7eed\u957f\u8fbe 48 \u5c0f\u65f6\u3002\u67e5\u770b\u65e7\u8bb0\u5f55\u7684 TTL\uff0c\u624d\u80fd\u66f4\u51c6\u786e\u5730\u4f30\u7b97\u7b49\u5f85\u65f6\u95f4\u3002<\/p>\n

    \u66f4\u6539\u670d\u52a1\u5668 IP \u4f1a\u5f71\u54cd\u7535\u5b50\u90ae\u4ef6\u6295\u9012\u5417\uff1f<\/h3>\n

    \u4f1a\uff0cIP \u53d8\u66f4\u540e\u90ae\u4ef6\u670d\u52a1\u6709\u53ef\u80fd\u53d7\u5230\u5f71\u54cd\u3002\u4f60\u7684\u57df\u540d MX \u8bb0\u5f55\u4f1a\u628a\u90ae\u4ef6\u670d\u52a1\u5668\u6307\u5411\u7279\u5b9a IP\uff0c\u56e0\u6b64\u5728\u66f4\u65b0 A \u8bb0\u5f55\u7684\u540c\u65f6\uff0c\u4e5f\u5e94\u4e00\u5e76\u66f4\u65b0 MX \u8bb0\u5f55\u3002\u6b64\u5916\uff0c\u8fd8\u8981\u68c0\u67e5 SPF \u548c DKIM \u8bbe\u7f6e\u3002\u8fd9\u4e9b\u8eab\u4efd\u9a8c\u8bc1\u8bb0\u5f55\u4e2d\u5f80\u5f80\u4e5f\u5305\u542b\u9700\u8981\u540c\u6b65\u66f4\u65b0\u7684 IP \u5730\u5740\u3002<\/p>\n

    \u5982\u4f55\u9a8c\u8bc1\u65b0 IP \u662f\u5426\u5de5\u4f5c\u6b63\u5e38\uff1f<\/h3>\n

    \u4f60\u53ef\u4ee5\u4f7f\u7528\u7f51\u7edc\u8bca\u65ad\u5de5\u5177\u6d4b\u8bd5\u8fde\u901a\u6027\uff0c\u5e76\u4f7f\u7528 DNS \u67e5\u8be2\u5de5\u5177\u786e\u8ba4\u89e3\u6790\u7ed3\u679c\u662f\u5426\u5df2\u7ecf\u6307\u5411\u65b0\u5730\u5740\u3002\u540c\u65f6\u67e5\u770b Web \u670d\u52a1\u5668\u8bbf\u95ee\u65e5\u5fd7\uff0c\u8fd9\u4e9b\u65e5\u5fd7\u4f1a\u663e\u793a\u8bf7\u6c42\u5b9e\u9645\u5230\u8fbe\u4e86\u54ea\u4e2a IP \u5730\u5740\u3002<\/p>\n

    \u66f4\u6362 IP \u540e\u9700\u8981\u66f4\u65b0 SSL \u8bc1\u4e66\u5417\uff1f<\/h3>\n

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