{"id":47332,"date":"2025-07-30T07:27:13","date_gmt":"2025-07-29T23:27:13","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/47332.html"},"modified":"2025-07-30T07:27:13","modified_gmt":"2025-07-29T23:27:13","slug":"%e3%80%90%e4%ba%91%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%89%e5%85%a8%e7%9b%b8%e5%85%b3%e3%80%91%e6%9c%8d%e5%8a%a1%e5%99%a8%e9%98%b2%e7%81%ab%e5%a2%99%e5%b8%b8%e8%a7%81%e7%b3%bb%e7%bb%9f%e6%97%a5%e5%bf%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/47332.html","title":{"rendered":"\u3010\u4e91\u670d\u52a1\u5668\u5b89\u5168\u76f8\u5173\u3011\u670d\u52a1\u5668\u9632\u706b\u5899\u5e38\u89c1\u7cfb\u7edf\u65e5\u5fd7\u4fe1\u606f\u8bf4\u660e"},"content":{"rendered":"<\/p>\n<h4>\u76ee\u5f55<\/h4>\n<ul>\n<li>\u2705 \u4e00\u3001\u9632\u706b\u5899\u65e5\u5fd7\u662f\u505a\u4ec0\u4e48\u7684&#xff1f;<\/li>\n<li>&#x1f6e0;\ufe0f \u4e8c\u3001\u5e38\u89c1\u9632\u706b\u5899\u65e5\u5fd7\u4fe1\u606f\u53ca\u8bf4\u660e<\/li>\n<li>&#x1f9ea; \u4e09\u3001\u5178\u578b\u65e5\u5fd7\u793a\u4f8b\u89e3\u6790<\/li>\n<li>\n<ul>\n<li>1. \u88ab\u963b\u65ad\u7684\u8bbf\u95ee&#xff08;DROP&#xff09;<\/li>\n<li>2. \u88ab\u5141\u8bb8\u7684\u8bbf\u95ee&#xff08;ACCEPT&#xff09;<\/li>\n<li>3. \u88ab\u62d2\u7edd\u7684\u7aef\u53e3\u8bbf\u95ee<\/li>\n<li>4. \u53ef\u7591\u7aef\u53e3\u626b\u63cf\u884c\u4e3a<\/li>\n<\/ul>\n<\/li>\n<li>&#x1f4cb; \u56db\u3001\u9632\u706b\u5899\u65e5\u5fd7\u4e2d\u9ad8\u9891\u5173\u952e\u8bcd\u5bf9\u7167\u8868<\/li>\n<li>&#x1f9e0; \u4e94\u3001\u5982\u4f55\u5904\u7406\u9632\u706b\u5899\u65e5\u5fd7\u4e2d\u7684\u544a\u8b66&#xff1f;<\/li>\n<li>\u2705 \u603b\u7ed3\u4e00\u53e5\u8bdd&#xff1a;<\/li>\n<\/ul>\n<hr \/>\n<p>\u5f53\u4f60\u5728\u4e91\u670d\u52a1\u5668\u6216\u9632\u706b\u5899\u540e\u53f0\u67e5\u770b\u5b89\u5168\u65e5\u5fd7\u65f6&#xff0c;\u53ef\u80fd\u4f1a\u770b\u5230\u4e00\u4e9b\u8ba9\u4eba\u4e0d\u592a\u7406\u89e3\u7684\u65e5\u5fd7\u8bb0\u5f55&#xff0c;\u6bd4\u5982&#xff1a;<\/p>\n<p>[UFW BLOCK] IN&#061;eth0 OUT&#061; MAC&#061;&#8230; SRC&#061;203.0.113.10 DST&#061;192.168.1.10 PROTO&#061;TCP SPT&#061;445 DPT&#061;22<\/p>\n<p>\u6216<\/p>\n<p>Dropped packet: IP&#061;8.8.8.8 PORT&#061;443 PROTOCOL&#061;UDP REASON&#061;Port not allowed<\/p>\n<p>\u8fd9\u4e9b\u65e5\u5fd7\u4fe1\u606f\u5230\u5e95\u662f\u4ec0\u4e48\u610f\u601d&#xff1f;\u54ea\u4e9b\u4ee3\u8868\u6b63\u5e38\u62e6\u622a&#xff0c;\u54ea\u4e9b\u63d0\u793a\u53ef\u80fd\u6709\u5b89\u5168\u98ce\u9669&#xff1f;\u4e0b\u9762\u5e26\u4f60\u5feb\u901f\u7406\u89e3\u9632\u706b\u5899\u7cfb\u7edf\u4e2d\u5e38\u89c1\u65e5\u5fd7\u5185\u5bb9\u53ca\u5173\u952e\u8bcd\u542b\u4e49\u3002<\/p>\n<hr \/>\n<h2>\u2705 \u4e00\u3001\u9632\u706b\u5899\u65e5\u5fd7\u662f\u505a\u4ec0\u4e48\u7684&#xff1f;<\/h2>\n<p>\u670d\u52a1\u5668\u9632\u706b\u5899\u65e5\u5fd7\u8bb0\u5f55\u4e86\u7cfb\u7edf\u5bf9\u7f51\u7edc\u8bbf\u95ee\u884c\u4e3a\u7684\u5904\u7406\u7ed3\u679c&#xff0c;\u4f8b\u5982\u54ea\u4e9b\u8fde\u63a5\u88ab\u5141\u8bb8\u3001\u54ea\u4e9b\u88ab\u62d2\u7edd\u3001\u88ab\u62e6\u622a\u7684\u539f\u56e0\u662f\u4ec0\u4e48\u3002<\/p>\n<p>\u7528\u9014\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u5ba1\u8ba1\u7f51\u7edc\u8bbf\u95ee\u884c\u4e3a<\/li>\n<li>\u53d1\u73b0\u6f5c\u5728\u653b\u51fb&#xff08;\u5982\u7aef\u53e3\u626b\u63cf\u3001\u7206\u7834&#xff09;<\/li>\n<li>\u6392\u67e5\u8bbf\u95ee\u5f02\u5e38\u95ee\u9898<\/li>\n<\/ul>\n<hr \/>\n<h2>&#x1f6e0;\ufe0f \u4e8c\u3001\u5e38\u89c1\u9632\u706b\u5899\u65e5\u5fd7\u4fe1\u606f\u53ca\u8bf4\u660e<\/h2>\n<table>\n<tr>\u65e5\u5fd7\u793a\u4f8b\u542b\u4e49\u4e2d\u6587\u89e3\u91ca<\/tr>\n<tbody>\n<tr>\n<td>ACCEPT \/ ALLOW<\/td>\n<td>\u5141\u8bb8\u8fde\u63a5<\/td>\n<td>\u9632\u706b\u5899\u89c4\u5219\u5141\u8bb8\u8fd9\u6761\u6d41\u91cf\u901a\u8fc7<\/td>\n<\/tr>\n<tr>\n<td>DROP \/ DENY \/ REJECT<\/td>\n<td>\u62d2\u7edd\u8bbf\u95ee<\/td>\n<td>\u9632\u706b\u5899\u62d2\u7edd\u4e86\u8be5\u8fde\u63a5\u8bf7\u6c42<\/td>\n<\/tr>\n<tr>\n<td>BLOCKED \/ UFW BLOCK<\/td>\n<td>\u88ab\u963b\u65ad<\/td>\n<td>Linux \u7684 UFW \u62e6\u622a\u4e86\u4e0d\u7b26\u5408\u89c4\u5219\u7684\u6d41\u91cf<\/td>\n<\/tr>\n<tr>\n<td>SRC&#061; \/ DST&#061;<\/td>\n<td>\u6765\u6e90 \/ \u76ee\u7684 IP<\/td>\n<td>\u5206\u522b\u8868\u793a\u6d41\u91cf\u6765\u6e90\u548c\u76ee\u6807\u7684 IP \u5730\u5740<\/td>\n<\/tr>\n<tr>\n<td>SPT&#061; \/ DPT&#061;<\/td>\n<td>\u6765\u6e90 \/ \u76ee\u7684\u7aef\u53e3<\/td>\n<td>SPT: Source Port&#xff0c;DPT: Destination Port<\/td>\n<\/tr>\n<tr>\n<td>PROTO&#061;<\/td>\n<td>\u534f\u8bae\u7c7b\u578b<\/td>\n<td>TCP\u3001UDP\u3001ICMP \u7b49<\/td>\n<\/tr>\n<tr>\n<td>REASON&#061;<\/td>\n<td>\u62e6\u622a\u539f\u56e0<\/td>\n<td>\u901a\u5e38\u662f\u201c\u7aef\u53e3\u672a\u5f00\u653e\u201d\u201c\u534f\u8bae\u4e0d\u7b26\u201d\u7b49\u8bf4\u660e<\/td>\n<\/tr>\n<tr>\n<td>Invalid Packet<\/td>\n<td>\u65e0\u6548\u6570\u636e\u5305<\/td>\n<td>\u53ef\u80fd\u662f\u653b\u51fb\u6d41\u91cf\u3001\u534f\u8bae\u6784\u9020\u9519\u8bef\u6216\u4f2a\u9020\u6570\u636e\u5305<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>&#x1f9ea; \u4e09\u3001\u5178\u578b\u65e5\u5fd7\u793a\u4f8b\u89e3\u6790<\/h2>\n<h3>1. \u88ab\u963b\u65ad\u7684\u8bbf\u95ee&#xff08;DROP&#xff09;<\/h3>\n<p>Jun <span class=\"token number\">10<\/span> <span class=\"token number\">15<\/span>:12:01 firewall: <span class=\"token assign-left variable\">IN<\/span><span class=\"token operator\">&#061;<\/span>eth0 <span class=\"token assign-left variable\">OUT<\/span><span class=\"token operator\">&#061;<\/span> <span class=\"token assign-left variable\">MAC<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">..<\/span>. <span class=\"token assign-left variable\">SRC<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">203.0<\/span>.113.1 <span class=\"token assign-left variable\">DST<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">10.0<\/span>.0.5 <span class=\"token assign-left variable\">PROTO<\/span><span class=\"token operator\">&#061;<\/span>TCP <span class=\"token assign-left variable\">SPT<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">34567<\/span> <span class=\"token assign-left variable\">DPT<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">22<\/span> <span class=\"token assign-left variable\">ACTION<\/span><span class=\"token operator\">&#061;<\/span>DROP<\/p>\n<p>\u542b\u4e49&#xff1a;\u6765\u81ea\u516c\u7f51 IP 203.0.113.1 \u60f3\u8bbf\u95ee\u4f60\u5185\u7f51\u670d\u52a1\u5668\u7684 22 \u7aef\u53e3&#xff08;SSH&#xff09;&#xff0c;\u4f46\u88ab\u9632\u706b\u5899\u963b\u65ad\u3002<\/p>\n<p>&#x1f512; \u5e38\u89c1\u4e8e&#xff1a;\u7206\u7834 SSH \u5bc6\u7801\u3001\u626b\u63cf\u7aef\u53e3\u3001\u975e\u6cd5\u8fde\u63a5\u5c1d\u8bd5\u3002<\/p>\n<hr \/>\n<h3>2. \u88ab\u5141\u8bb8\u7684\u8bbf\u95ee&#xff08;ACCEPT&#xff09;<\/h3>\n<p>Jul 01 08:35:44 iptables: ACCEPT <span class=\"token assign-left variable\">IN<\/span><span class=\"token operator\">&#061;<\/span>eth0 <span class=\"token assign-left variable\">OUT<\/span><span class=\"token operator\">&#061;<\/span> <span class=\"token assign-left variable\">MAC<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">..<\/span>. <span class=\"token assign-left variable\">SRC<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">10.0<\/span>.0.100 <span class=\"token assign-left variable\">DST<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">10.0<\/span>.0.5 <span class=\"token assign-left variable\">PROTO<\/span><span class=\"token operator\">&#061;<\/span>TCP <span class=\"token assign-left variable\">SPT<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">443<\/span> <span class=\"token assign-left variable\">DPT<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">8080<\/span><\/p>\n<p>\u542b\u4e49&#xff1a;\u5185\u7f51\u67d0\u670d\u52a1\u8bbf\u95ee\u4f60\u670d\u52a1\u5668\u7684 8080 \u7aef\u53e3&#xff0c;\u9632\u706b\u5899\u89c4\u5219\u5141\u8bb8\u6b64\u8fde\u63a5\u3002<\/p>\n<hr \/>\n<h3>3. \u88ab\u62d2\u7edd\u7684\u7aef\u53e3\u8bbf\u95ee<\/h3>\n<p>Firewall: Dropped UDP packet from <span class=\"token number\">8.8<\/span>.8.8 to port <span class=\"token number\">12345<\/span> &#8211; Port not <span class=\"token function\">open<\/span><\/p>\n<p>\u542b\u4e49&#xff1a;Google DNS 8.8.8.8 \u8bd5\u56fe\u8bbf\u95ee\u4f60\u7684 UDP \u7aef\u53e3 12345&#xff0c;\u4f46\u8fd9\u4e2a\u7aef\u53e3\u6ca1\u5f00\u653e\u3002<\/p>\n<p>&#x1f50d; \u5e38\u89c1\u4e8e&#xff1a;UDP \u626b\u63cf\u3001DDOS \u63a2\u6d4b\u3002<\/p>\n<hr \/>\n<h3>4. \u53ef\u7591\u7aef\u53e3\u626b\u63cf\u884c\u4e3a<\/h3>\n<p>Jun <span class=\"token number\">5<\/span> <span class=\"token number\">12<\/span>:11:10 firewall: Detected TCP Port Scan from <span class=\"token number\">198.51<\/span>.100.12<\/p>\n<p>\u542b\u4e49&#xff1a;\u653b\u51fb\u8005\u5c1d\u8bd5\u5feb\u901f\u8fde\u63a5\u591a\u4e2a\u7aef\u53e3&#xff0c;\u9632\u706b\u5899\u8bc6\u522b\u4e3a\u7aef\u53e3\u626b\u63cf\u884c\u4e3a\u3002<\/p>\n<p>&#x1f6e1;\ufe0f \u5efa\u8bae&#xff1a;\u6dfb\u52a0 IP \u9ed1\u540d\u5355\u6216\u914d\u5408 IDS \u8054\u52a8\u62e6\u622a\u3002<\/p>\n<hr \/>\n<h2>&#x1f4cb; \u56db\u3001\u9632\u706b\u5899\u65e5\u5fd7\u4e2d\u9ad8\u9891\u5173\u952e\u8bcd\u5bf9\u7167\u8868<\/h2>\n<table>\n<tr>\u82f1\u6587\u5173\u952e\u5b57\u4e2d\u6587\u542b\u4e49\u5907\u6ce8\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>DROP<\/td>\n<td>\u4e22\u5f03<\/td>\n<td>\u6ca1\u6709\u56de\u5e94<\/td>\n<\/tr>\n<tr>\n<td>REJECT<\/td>\n<td>\u62d2\u7edd<\/td>\n<td>\u8fd4\u56de\u201c\u8fde\u63a5\u88ab\u62d2\u201d<\/td>\n<\/tr>\n<tr>\n<td>ACCEPT<\/td>\n<td>\u5141\u8bb8<\/td>\n<td>\u653e\u884c\u8fde\u63a5<\/td>\n<\/tr>\n<tr>\n<td>SPT\/DPT<\/td>\n<td>\u6e90\/\u76ee\u7684\u7aef\u53e3<\/td>\n<td>\u5e38\u89c1\u7aef\u53e3\u5982 22, 80, 443<\/td>\n<\/tr>\n<tr>\n<td>SRC\/DST<\/td>\n<td>\u6e90\/\u76ee\u7684IP<\/td>\n<td>\u6765\u6e90\u548c\u76ee\u6807\u4e3b\u673a<\/td>\n<\/tr>\n<tr>\n<td>PROTO<\/td>\n<td>\u534f\u8bae\u7c7b\u578b<\/td>\n<td>TCP, UDP, ICMP<\/td>\n<\/tr>\n<tr>\n<td>INVALID<\/td>\n<td>\u65e0\u6548\u8fde\u63a5<\/td>\n<td>\u591a\u6570\u4e3a\u5f02\u5e38\u6216\u653b\u51fb\u6d41\u91cf<\/td>\n<\/tr>\n<tr>\n<td>SCAN<\/td>\n<td>\u626b\u63cf\u884c\u4e3a<\/td>\n<td>\u901a\u5e38\u8868\u793a\u53ef\u7591\u884c\u4e3a<\/td>\n<\/tr>\n<tr>\n<td>LOG<\/td>\n<td>\u8bb0\u5f55<\/td>\n<td>\u8868\u793a\u8be5\u6761\u4fe1\u606f\u88ab\u8bb0\u5f55\u5728\u6848<\/td>\n<\/tr>\n<tr>\n<td>LIMIT<\/td>\n<td>\u9650\u901f<\/td>\n<td>\u9632\u6b62\u8fc7\u591a\u8bbf\u95ee\u9020\u6210\u653b\u51fb<\/td>\n<\/tr>\n<tr>\n<td>NEW<\/td>\n<td>\u65b0\u8fde\u63a5<\/td>\n<td>\u8868\u793a\u53d1\u8d77\u7684\u65b0 TCP \u8fde\u63a5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>&#x1f9e0; \u4e94\u3001\u5982\u4f55\u5904\u7406\u9632\u706b\u5899\u65e5\u5fd7\u4e2d\u7684\u544a\u8b66&#xff1f;<\/h2>\n<li>\n<p>\u9891\u7e41\u7684 DROP \u65e5\u5fd7<\/p>\n<ul>\n<li>\u2705 \u6b63\u5e38&#xff1a;\u8bf4\u660e\u9632\u706b\u5899\u5de5\u4f5c\u6b63\u5e38<\/li>\n<li>\u26a0\ufe0f 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