{"id":5521,"date":"2025-05-13T10:10:20","date_gmt":"2025-05-13T10:10:20","guid":{"rendered":"https:\/\/hocoos.com\/?post_type=answer&#038;p=5521"},"modified":"2025-05-13T10:10:25","modified_gmt":"2025-05-13T10:10:25","slug":"what-is-a-firewall","status":"publish","type":"answer","link":"https:\/\/hocoos.com\/zh\/%e7%ad%94%e6%a1%88\/what-is-a-firewall\/","title":{"rendered":"\u4ec0\u4e48\u662f\u9632\u706b\u5899\uff1f"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><strong>\u9632\u706b\u5899\u6709\u54ea\u4e9b\u4e0d\u540c\u7c7b\u578b\uff1f<\/strong><\/h2>\n\n\n\n<p>\u9632\u706b\u5899\u79cd\u7c7b\u7e41\u591a\uff0c\u5b83\u4eec\u68c0\u67e5\u7f51\u7edc\u6d41\u91cf\u7684\u65b9\u5f0f\u5404\u4e0d\u76f8\u540c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6570\u636e\u5305\u8fc7\u6ee4\u9632\u706b\u5899\uff1a<\/strong> \u8fd9\u7c7b\u9632\u706b\u5899\u67e5\u770b\u6570\u636e\u5305\u4e2d\u7684\u57fa\u672c\u4fe1\u606f\uff0c\u4f8b\u5982\u5730\u5740\u4fe1\u606f\u3002\u5b83\u7c97\u7565\u5730\u68c0\u67e5\u6e90\u5730\u5740\u3001\u76ee\u6807\u5730\u5740\u548c\u7aef\u53e3\uff0c\u867d\u7136\u4f5c\u7528\u6709\u9650\uff0c\u4f46\u901f\u5ea6\u5f88\u5feb\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5e94\u7528\u5c42\u9632\u706b\u5899\uff08\u4ee3\u7406\uff09\uff1a <\/strong>\u8fd9\u7c7b\u9632\u706b\u5899\u5206\u6790\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5305\u542b\u7684\u6570\u636e\uff0c\u4ece\u800c\u63d0\u4f9b\u66f4\u5f3a\u7684\u5b89\u5168\u6027\uff0c\u4f46\u4f1a\u964d\u4f4e\u7cfb\u7edf\u901f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A \u7c7b\u9632\u706b\u5899\uff1a<\/strong> \u4e0e\u72b6\u6001\u68c0\u6d4b\u9632\u706b\u5899\u76f8\u6bd4\uff0c\u8fd9\u4e9b\u9632\u706b\u5899\u8ddf\u8e2a\u6d3b\u52a8\u8fde\u63a5\uff0c\u53ef\u80fd\u4f1a\u5f71\u54cd\u5b89\u5168\u51b3\u7b56\u548c\u5b89\u5168\u7ea7\u522b\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4e0b\u4e00\u4ee3\u9632\u706b\u5899 (NGFW)\uff1a<\/strong> \u5b83\u4eec\u63d0\u4f9b\u7684\u529f\u80fd\u8d85\u8d8a\u4e86\u4f20\u7edf\u9632\u706b\u5899\uff0c\u5305\u62ec\u6df1\u5ea6\u6570\u636e\u5305\u68c0\u6d4b\u3001\u5165\u4fb5\u9632\u5fa1\u548c\u5e94\u7528\u7a0b\u5e8f\u611f\u77e5\uff0c\u53ef\u80fd\u4f1a\u5f71\u54cd\u5b89\u5168\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<div class=\"answers-tip-box mt-8 mt-lg-10\">\n<div class=\"answers-small-title\">\n\t\t\t\t\t\t\t\n\u4e13\u5bb6\u63d0\u793a\uff1a\u00a0\n\n<\/div>\n<div class=\"answers-small-description mt-4\">\n\n\u8bc6\u522b\u4e0d\u540c\u7c7b\u578b\u7684\u9632\u706b\u5899\uff0c\u540c\u65f6\u6ce8\u610f\u7f51\u7edc\u7684\u590d\u6742\u6027\u548c\u7279\u5b9a\u7684\u5b89\u5168\u8981\u6c42\u3002\n\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:72px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u9632\u706b\u5899\u5982\u4f55\u5904\u7406\u4f20\u5165\u548c\u4f20\u51fa\u7684\u6d41\u91cf\uff1f<\/strong><\/h2>\n\n\n\n<p>\u9632\u706b\u5899\u6839\u636e\u8bbe\u7f6e\u7684\u89c4\u5219\u5904\u7406\u4f20\u5165\u548c\u4f20\u51fa\u7684\u6d41\u91cf\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4f20\u5165\u6d41\u91cf\uff1a<\/strong> \u9632\u706b\u5899\u4f1a\u68c0\u67e5\u6765\u81ea\u5916\u90e8\u6e90\u7684\u8fde\u63a5\u8bf7\u6c42\u662f\u5426\u7b26\u5408\u89c4\u5219\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u5141\u8bb8\u5728\u7279\u5b9a\u7aef\u53e3\u4e0a\u8fde\u63a5\u5230\u60a8\u7684Web\u670d\u52a1\u5668\uff0c\u540c\u65f6\u62d2\u7edd\u6240\u6709\u5176\u4ed6\u8bbf\u95ee\u5c1d\u8bd5\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4f20\u51fa\u6d41\u91cf\uff1a <\/strong>\u9632\u706b\u5899\u8fd8\u53ef\u4ee5\u9650\u5236\u5185\u90e8\u8bbe\u5907\u6216\u5e94\u7528\u7a0b\u5e8f\u8bbf\u95ee\u5916\u90e8\u8d44\u6e90\u3002\u8fd9\u5c06\u963b\u6b62\u6076\u610f\u8f6f\u4ef6\u5c1d\u8bd5\u201c\u5411\u5916\u90e8\u53d1\u9001\u4fe1\u606f\u201d\uff0c\u5e76\u9632\u6b62\u7528\u6237\u8bbf\u95ee\u5371\u9669\u7ad9\u70b9\u3002<\/li>\n<\/ul>\n\n\n\n<div class=\"answers-tip-box mt-8 mt-lg-10\">\n<div class=\"answers-small-title\">\n\t\t\t\t\t\t\t\n\u4e13\u5bb6\u63d0\u793a\uff1a\n\n<\/div>\n<div class=\"answers-small-description mt-4\">\n\n\u51fa\u7ad9\u89c4\u5219\u5f88\u91cd\u8981\uff1b\u8fc7\u5ea6\u5bbd\u677e\u7684\u8fb9\u754c\u53ef\u80fd\u4f1a\u6388\u4e88\u5bf9\u5185\u90e8\u7f51\u7edc\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u5176\u6574\u4f53\u5b89\u5168\u72b6\u51b5\u3002\n\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:72px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4ec0\u4e48\u662f\u9632\u706b\u5899\u89c4\u5219\uff0c\u4ee5\u53ca\u5982\u4f55\u914d\u7f6e\u5b83\u4eec\uff1f<\/strong><\/h2>\n\n\n\n<p>\u6bcf\u4e2a\u9632\u706b\u5899\u90fd\u6709\u89c4\u5219\u6307\u793a <a href=\"https:\/\/hocoos.com\/zh\/%e7%ad%94%e6%a1%88\/%e4%bb%80%e4%b9%88%e6%98%af%e7%bd%91%e7%ab%99%e6%b5%81%e9%87%8f%e6%9d%a5%e6%ba%90\/\" data-type=\"answer\" data-id=\"4309\">\u54ea\u4e9b\u6d41\u91cf<\/a> \u5e94\u8be5\u5141\u8bb8\u901a\u8fc7\u4ee5\u53ca\u54ea\u4e9b\u5e94\u8be5\u88ab\u963b\u6b62\u3002\u4ee5\u4e0b\u5217\u51fa\u4e86\u4e00\u4e9b\u5e38\u89c1\u529f\u80fd\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6e90\u548c\u76ee\u6807IP\u5730\u5740\uff1a<\/strong> \u8bc6\u522b\u6d89\u53ca\u7684\u7f51\u7edc\u6216\u8ba1\u7b97\u673a\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7aef\u53e3\u53f7\uff1a <\/strong>\u63cf\u8ff0\u5c06\u4f7f\u7528\u4ec0\u4e48\u5e94\u7528\u7a0b\u5e8f\u6216\u670d\u52a1\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u534f\u8bae\uff1a<\/strong> \u6307\u5b9a\u901a\u4fe1\u8bed\u8a00\u7684\u7c7b\u578b\uff0c\u4f8b\u5982 TCP \u548c UDP\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6bcf\u6b21\u9632\u706b\u5899\u81ea\u5b9a\u4e49\u90fd\u9700\u8981\u7ba1\u7406\u5458\u901a\u8fc7\u7ba1\u7406\u754c\u9762\u8bbe\u7f6e\u89c4\u5219\u3002\u6bcf\u6761\u89c4\u5219\u90fd\u5fc5\u987b\u7b26\u5408\u7ec4\u7ec7\u5b89\u5168\u7b56\u7565\u3002<\/p>\n\n\n\n<div style=\"height:72px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u8f6f\u4ef6\u9632\u706b\u5899\u548c\u786c\u4ef6\u9632\u706b\u5899\u4e00\u6837\u6709\u6548\u5417\uff1f<\/strong><\/h2>\n\n\n\n<p>\u6bcf\u9879\u5b89\u5168\u63aa\u65bd\u90fd\u5177\u6709\u4e0e\u9632\u706b\u5899\u64cd\u4f5c\u76f8\u5173\u7684\u7279\u5b9a\u7279\u5f81\uff0c\u65e0\u8bba\u662f\u5728\u8f6f\u4ef6\u8fd8\u662f\u786c\u4ef6\u4e2d\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u8f6f\u4ef6\u9632\u706b\u5899\uff1a<\/strong> \u5728\u5355\u4e2a\u8bbe\u5907\u7ea7\u522b\uff08\u4f8b\u5982\u5728\u8ba1\u7b97\u673a\u4e0a\uff09\u63d0\u4f9b\u7f51\u7edc\u5b89\u5168\u3002\u8f6f\u4ef6\u9632\u706b\u5899\u7ba1\u7406\u7279\u5b9a\u7684\u7a0b\u5e8f\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8bbe\u5907\u4e0a\u7684\u63a7\u5236\u7ea7\u522b\u4e0d\u540c\u3002\u4f8b\u5982 Windows Firewall \u6216 macOS Firewall\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u786c\u4ef6\u9632\u706b\u5899\uff1a<\/strong> \u4f5c\u4e3a\u72ec\u7acb\u5355\u5143\uff0c\u5b83\u4eec\u7684\u529f\u80fd\u662f\u540c\u65f6\u4fdd\u62a4\u6574\u4e2a\u8bbe\u5907\u7f51\u7edc\u3002\u80fd\u591f\u5728\u591a\u4e2a\u8bbe\u5907\u4e0a\u540c\u65f6\u8fd0\u884c\uff0c\u6269\u5c55\u4e86\u5b89\u5168\u63aa\u65bd\u7684\u8303\u56f4\u3002\u76ee\u524d\uff0c\u5927\u591a\u6570\u529e\u516c\u5ba4\u548c\u5bb6\u5ead\u4f7f\u7528\u7684\u8def\u7531\u5668\u901a\u5e38\u90fd\u5e26\u6709\u5185\u7f6e\u786c\u4ef6\u9632\u706b\u5899\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4e3a\u4e86\u83b7\u5f97\u6700\u4f73\u6548\u679c\uff0c\u6700\u597d\u662f\u5c06\u4e24\u8005\u7ed3\u5408\u4f7f\u7528\uff0c\u5c24\u5176\u662f\u5728\u5206\u5c42\u5b89\u5168\u7b56\u7565\u4e2d\u3002<\/p>\n\n\n\n<div class=\"answers-tip-box mt-8 mt-lg-10\">\n<div class=\"answers-small-title\">\n\t\t\t\t\t\t\t\n\u4e13\u5bb6\u63d0\u793a\uff1a\u00a0\n\n<\/div>\n<div class=\"answers-small-description mt-4\">\n\n\u4f7f\u7528\u591a\u79cd\u7c7b\u578b\u7684\u9632\u706b\u5899\u53ef\u80fd\u6bd4\u4ec5\u4f7f\u7528\u4e00\u79cd\u66f4\u6709\u76ca\u3002\u4ec5\u4ec5\u4f9d\u9760\u4e00\u79cd\u7c7b\u578b\u7684\u9632\u706b\u5899\uff08\u8f6f\u4ef6\u6216\u786c\u4ef6\uff09\u53ef\u80fd\u4f1a\u5f71\u54cd\u7f51\u7edc\u7684\u5b89\u5168\u72b6\u51b5\uff1b\u56e0\u6b64\uff0c\u5c06\u5355\u4e2a\u8bbe\u5907\u4e0a\u7684\u8f6f\u4ef6\u9632\u706b\u5899\u4e0e\u5916\u56f4\u7684\u786c\u4ef6\u9632\u706b\u5899\u7ed3\u5408\u4f7f\u7528\uff0c\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6df1\u5ea6\u9632\u5fa1\u7b56\u7565\u3002\n\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:72px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4e0b\u4e00\u4ee3\u9632\u706b\u5899 (NGFW) \u4e0e\u4f20\u7edf\u9632\u706b\u5899\u6709\u4f55\u4e0d\u540c\uff1f<\/strong><\/h2>\n\n\n\n<p>\u4e0b\u4e00\u4ee3\u9632\u706b\u5899 (NGFW) \u5305\u542b\u4e0e\u4f20\u7edf\u9632\u706b\u5899\u4e0d\u540c\u7684\u7f51\u7edc\u5b89\u5168\u529f\u80fd\uff0c\u5176\u4e2d\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5e94\u7528\u7a0b\u5e8f\u611f\u77e5\u548c\u63a7\u5236\uff1a <\/strong>\u80fd\u591f\u533a\u5206\u901a\u8fc7\u7f51\u7edc\u8bbf\u95ee\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u5141\u8bb8\u7279\u5b9a\u5e94\u7528\u7a0b\u5e8f\uff08\u4f8b\u5982\uff0c\u5141\u8bb8\u7f51\u9875\u6d4f\u89c8\uff0c\u4f46\u963b\u6b62\u6587\u4ef6\u5171\u4eab\u5e94\u7528\u7a0b\u5e8f\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7528\u6237\u8eab\u4efd\u8bc6\u522b\uff1a<\/strong> \u4e0e\u7b56\u7565\u6570\u636e\u5e93\u7ba1\u7406\u5668\u534f\u540c\u5de5\u4f5c\uff0c\u4e0d\u4ec5\u6839\u636e <a href=\"https:\/\/hocoos.com\/zh\/%e7%ad%94%e6%a1%88\/%e4%bb%80%e4%b9%88%e6%98%afip%e5%9c%b0%e5%9d%80\/\" data-type=\"answer\" data-id=\"4247\">IP \u5730\u5740<\/a>\uff0c\u800c\u4e14\u6839\u636e\u7528\u6237\u8eab\u4efd\u63d0\u4f9b\u7b56\u7565\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6df1\u5ea6\u6570\u636e\u5305\u68c0\u6d4b (DPI)\uff1a<\/strong> \u4e0d\u4ec5\u68c0\u67e5\u6570\u636e\u5305\u7684\u6807\u5934\uff0c\u8fd8\u68c0\u67e5\u7f51\u7edc\u6570\u636e\u5305\u7684\u5185\u5bb9\uff0c\u4ece\u800c\u5b9e\u73b0\u9ad8\u7ea7\u5a01\u80c1\u8bc6\u522b\u548c\u963b\u6b62\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5165\u4fb5\u9632\u5fa1\u7cfb\u7edf (IPS)\uff1a<\/strong> \u5bf9\u4f20\u5165\u548c\u4f20\u51fa\u7f51\u7edc\u6570\u636e\u7684\u6301\u7eed\u76d1\u63a7\u53ef\u4ee5\u8bc6\u522b\u5e76\u8bb0\u5f55\u6709\u5bb3\u6d3b\u52a8\uff0c\u751a\u81f3\u53ef\u4ee5\u963b\u6b62\u548c\u6d88\u9664\u5a01\u80c1\u3002\u00a0<\/li>\n<\/ul>\n\n\n\n<p>\u4e0e\u5177\u6709\u57fa\u672c\u7cfb\u7edf\u7684\u4f20\u7edf\u9632\u706b\u5899\u76f8\u6bd4\uff0cNGFW \u91c7\u7528\u5148\u8fdb\u7684\u6280\u672f\u548c\u8bbe\u5907\uff0c\u53ef\u4ee5\u5f71\u54cd\u7f51\u7edc\u4fdd\u62a4\u7ea7\u522b\uff0c\u4ece\u800c\u53ef\u80fd\u5f71\u54cd\u7f51\u7edc\u5b89\u5168\u6f0f\u6d1e\u7684\u8bc6\u522b\u548c\u654f\u611f\u4fe1\u606f\u7684\u4fdd\u62a4\u3002<\/p>\n\n\n\n<div style=\"height:72px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u603b\u7ed3<\/strong><\/h2>\n\n\n\n<p>\u9632\u706b\u5899\u662f\u7f51\u7edc\u5b89\u5168\u4e2d\u6700\u5173\u952e\u7684\u7ec4\u6210\u90e8\u5206\u4e4b\u4e00\u3002\u5b83\u4eec\u4fdd\u62a4\u6211\u4eec\u7684\u6570\u5b57\u9886\u57df\u5e76\u7ba1\u7406\u7f51\u7edc\u6d41\u91cf\u3002\u4e86\u89e3\u5982\u4f55\u5229\u7528\u9632\u706b\u5899\u53ca\u5176\u5404\u79cd\u7c7b\u578b\uff0c\u4f7f\u4e2a\u4eba\u548c\u4f01\u4e1a\u80fd\u591f\u5145\u5206\u5236\u5b9a\u6218\u7565\uff0c\u5e94\u5bf9\u7f51\u7edc\u72af\u7f6a\uff0c\u5e76\u5c3d\u53ef\u80fd\u5e7f\u6cdb\u5730\u4fdd\u62a4\u81ea\u5df1\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>What are the different types of firewalls? Different categories of firewalls exist, and they differ in the manner in which each examines traffic moving across a network: Pro Tip:\u00a0 Identify different types of firewalls, but pay attention to the intricacy of your network and the distinct security requirements. How do firewalls handle incoming and outgoing [&hellip;]<\/p>","protected":false},"author":39,"featured_media":5522,"template":"","answers_category":[21],"class_list":["post-5521","answer","type-answer","status-publish","has-post-thumbnail","hentry","answers_category-hosting"],"acf":{"image":null,"card_image":5522,"content":[{"acf_fc_layout":"header_section","title":"\u4ec0\u4e48\u662f\u9632\u706b\u5899\uff1f","descriptions":"A firewall is a security measure that regulates and manages the traffic over a network by forming a protective barrier around the internal network while maintaining access to unverified and external networks, such as the internet. A firewall is important because it prevents unauthorized users and damaged equipment from infiltrating your systems.<br\/><br\/>\r\nA firewall protects your information technology system by analyzing the incoming and outgoing traffic and preventing anything that contradicts its protocols from entering. \r\n","tip_label":"Pro Tip","tip":"Regularly reviewing your firewall logs is beneficial to prevent breaches; observed activity levels, when compared to a baseline, might be indicative of a security incident.","additional_tips":null,"key_takeaways_label":"Key Takeaways:","key_takeaways":[{"label":"Firewalls are designed to limit network traffic to prevent unauthorized access","body":""},{"label":"The level of protection offered by various firewall types differs; thus, selection is based on specific security requirements","body":""},{"label":"It is common for firewalls to be parts of integrated systems of security, which operate on several levels, and each has a defined set of rules","body":""}]}]},"_links":{"self":[{"href":"https:\/\/hocoos.com\/zh\/wp-json\/wp\/v2\/answer\/5521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hocoos.com\/zh\/wp-json\/wp\/v2\/answer"}],"about":[{"href":"https:\/\/hocoos.com\/zh\/wp-json\/wp\/v2\/types\/answer"}],"author":[{"embeddable":true,"href":"https:\/\/hocoos.com\/zh\/wp-json\/wp\/v2\/users\/39"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocoos.com\/zh\/wp-json\/wp\/v2\/media\/5522"}],"wp:attachment":[{"href":"https:\/\/hocoos.com\/zh\/wp-json\/wp\/v2\/media?parent=5521"}],"wp:term":[{"taxonomy":"answers_category","embeddable":true,"href":"https:\/\/hocoos.com\/zh\/wp-json\/wp\/v2\/answers_category?post=5521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}