{"id":55068,"date":"2025-08-13T15:49:49","date_gmt":"2025-08-13T07:49:49","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/55068.html"},"modified":"2025-08-13T15:49:49","modified_gmt":"2025-08-13T07:49:49","slug":"wireshark%e4%b8%93%e5%ae%b6%e6%a8%a1%e5%bc%8f%e5%ae%9a%e4%bd%8d%e7%bd%91%e7%bb%9c%e6%95%85%e9%9a%9c%ef%bc%9a14%e7%a7%8dtcp%e5%bc%82%e5%b8%b8%e6%b7%b1%e5%ba%a6%e8%a7%a3%e5%89%96","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/55068.html","title":{"rendered":"Wireshark\u4e13\u5bb6\u6a21\u5f0f\u5b9a\u4f4d\u7f51\u7edc\u6545\u969c\uff1a14\u79cdTCP\u5f02\u5e38\u6df1\u5ea6\u89e3\u5256"},"content":{"rendered":"<p>TCP\u8fde\u63a5\u5982\u540c\u7cbe\u5bc6\u8fd0\u8f6c\u7684\u4f20\u9001\u5e26&#xff0c;\u6bcf\u4e00\u4e2a\u5f02\u5e38\u6570\u636e\u5305\u90fd\u662f\u6545\u969c\u7684\u65e9\u671f\u4fe1\u53f7\u3002<\/p>\n<p>\u4f5c\u4e3a\u7f51\u7edc\u5de5\u7a0b\u5e08\u7684\u201c\u5916\u79d1\u624b\u672f\u5200\u201d&#xff0c;Wireshark\u5728TCP\u6545\u969c\u8bca\u65ad\u9886\u57df\u7684\u4ef7\u503c\u65e0\u53ef\u66ff\u4ee3\u3002\u672c\u6587\u5c06\u901a\u8fc714\u4e2a\u771f\u5b9e\u6545\u969c\u573a\u666f&#xff0c;\u63ed\u793a\u5982\u4f55\u5229\u7528Wireshark\u4e13\u5bb6\u7cfb\u7edf&#xff08;Expert System&#xff09;\u548c\u9ad8\u7ea7\u8fc7\u6ee4\u6280\u672f\u7cbe\u51c6\u5b9a\u4f4dTCP\u5c42\u5f02\u5e38\u3002<\/p>\n<hr \/>\n<h4>\u4e00\u3001TCP\u8fde\u63a5\u5efa\u7acb\u6545\u969c<\/h4>\n<h5>1. SYN\u98ce\u66b4\u653b\u51fb&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-001&#xff09;<\/h5>\n<p>\u73b0\u8c61&#xff1a;\u670d\u52a1\u5668\u6027\u80fd\u9aa4\u964d&#xff0c;\u9632\u706b\u5899\u544a\u8b66SYN\u6cdb\u6d2a<br \/>\nWireshark\u8bc1\u636e&#xff1a;<\/p>\n<p>tcp.flags.syn &#061;&#061; 1 and tcp.flags.ack &#061;&#061; 0 \u00a0# \u8fc7\u6ee4\u7eafSYN\u5305<\/p>\n<ul>\n<li>\n<p>\u2022 \u7edf\u8ba1\u89c6\u56fe\u663e\u793a\u5355\u4e00\u76ee\u6807IP\u63a5\u6536\u6570\u5343SYN\u5305<\/p>\n<\/li>\n<li>\n<p>\u2022 \u4e13\u5bb6\u7cfb\u7edf\u63d0\u793a[TCP Previous segment not captured]\u6fc0\u589e<br \/>\n\u8bca\u65ad\u7ed3\u8bba&#xff1a;\u5206\u5e03\u5f0fSYN Flood\u653b\u51fb&#xff0c;\u9700\u542f\u7528SYN Cookie\u9632\u62a4<\/p>\n<\/li>\n<\/ul>\n<h5>2. \u7aef\u53e3\u65e0\u54cd\u5e94&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-002&#xff09;<\/h5>\n<p>\u73b0\u8c61&#xff1a;\u5ba2\u6237\u7aef\u8fde\u63a5\u7279\u5b9a\u670d\u52a1\u8d85\u65f6<br \/>\n\u6293\u5305\u5173\u952e\u70b9&#xff1a;<\/p>\n<p>(ip.dst &#061;&#061; 10.1.1.100 and tcp.dstport &#061;&#061; 8080) and (tcp.flags.syn &#061;&#061; 1)<\/p>\n<ul>\n<li>\n<p>\u2022 \u5ba2\u6237\u7aef\u8fde\u7eed\u53d1\u90013\u6b21SYN\u5305&#xff08;\u95f4\u96941s\/3s\/7s&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u2022 \u65e0\u4efb\u4f55SYN-ACK\u6216RST\u54cd\u5e94<br \/>\n\u6839\u56e0\u5b9a\u4f4d&#xff1a;\u76ee\u6807\u670d\u52a1\u5668\u9632\u706b\u5899\u4e22\u5f03\u6d41\u91cf\u6216\u8fdb\u7a0b\u5d29\u6e83<\/p>\n<\/li>\n<\/ul>\n<h5>3. \u5f02\u5e38RST\u963b\u65ad\u8fde\u63a5&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-003&#xff09;<\/h5>\n<p>\u73b0\u8c61&#xff1a;\u8fde\u63a5\u5efa\u7acb\u540e\u7acb\u5373\u4e2d\u65ad<br \/>\n\u5173\u952e\u8fc7\u6ee4&#xff1a;<\/p>\n<p>tcp.flags.reset &#061;&#061; 1 and tcp.seq &#061;&#061; 1 \u00a0# \u5e8f\u5217\u53f7\u4e3a1\u7684RST<\/p>\n<ul>\n<li>\n<p>\u2022 \u4e09\u6b21\u63e1\u624b\u6210\u529f\u540e&#xff0c;\u670d\u52a1\u7aef\u7acb\u5373\u8fd4\u56deRST<\/p>\n<\/li>\n<li>\n<p>\u2022\u00a0Possible Causes&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u2022 \u5e94\u7528\u8fdb\u7a0b\u5d29\u6e83&#xff08;\u68c0\u67e5ss -tulp | grep &lt;port&gt;&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u2022 \u4e2d\u95f4\u8bbe\u5907\u7b56\u7565\u963b\u65ad&#xff08;\u5982AWS\u5b89\u5168\u7ec4&#xff09;<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>\u4e8c\u3001\u6570\u636e\u4f20\u8f93\u6545\u969c<\/h4>\n<h5>4. \u96f6\u7a97\u53e3\u505c\u6ede&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-004&#xff09;<\/h5>\n<p>\u73b0\u8c61&#xff1a;\u6587\u4ef6\u4f20\u8f93\u5361\u987f<br \/>\n\u8bca\u65ad\u5de5\u5177&#xff1a;<\/p>\n<p>tcp.window_size &#061;&#061; 0 \u00a0# \u96f6\u7a97\u53e3\u901a\u544a<\/p>\n<ul>\n<li>\n<p>\u2022 \u63a5\u6536\u65b9\u6301\u7eed\u53d1\u9001Win&#061;0\u901a\u544a<\/p>\n<\/li>\n<li>\n<p>\u2022 \u4e13\u5bb6\u7cfb\u7edf\u6807\u8bb0[TCP ZeroWindow]<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;\u68c0\u67e5\u63a5\u6536\u65b9\u5e94\u7528\u5904\u7406\u80fd\u529b&#xff08;\u5982\u78c1\u76d8IO\u963b\u585e&#xff09;<\/p>\n<\/li>\n<\/ul>\n<h5>5. \u91cd\u4f20\u98ce\u66b4&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-005&#xff09;<\/h5>\n<p>Wireshark\u9ec4\u91d1\u8fc7\u6ee4\u5668&#xff1a;<\/p>\n<p>tcp.analysis.retransmission \u00a0# \u5b98\u65b9\u91cd\u4f20\u6807\u8bb0<\/p>\n<p>\u7c7b\u578b\u7cbe\u5224&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u2022\u00a0\u8d85\u65f6\u91cd\u4f20&#xff1a;\u8fde\u7eed3\u6b21\u76f8\u540cSeq\u53f7\u5305<\/p>\n<\/li>\n<li>\n<p>\u2022\u00a0\u5feb\u901f\u91cd\u4f20&#xff1a;\u6536\u52303\u4e2a\u91cd\u590dACK\u540e\u7684\u91cd\u4f20<\/p>\n<\/li>\n<li>\n<p>\u2022\u00a0\u4e71\u5e8f\u89e6\u53d1&#xff1a;\u4e13\u5bb6\u7cfb\u7edf\u63d0\u793a[TCP Out-of-Order]<\/p>\n<\/li>\n<\/ul>\n<h5>6. SACK\u5f02\u5e38&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-006&#xff09;<\/h5>\n<p>\u73b0\u8c61&#xff1a;\u9ad8\u901f\u4f20\u8f93\u65f6\u541e\u5410\u91cf\u9aa4\u964d<br \/>\n\u6df1\u5ea6\u89e3\u6790&#xff1a;<\/p>\n<p>tcp.options.sack \u00a0# \u8fc7\u6ee4SACK\u9009\u9879<\/p>\n<ul>\n<li>\n<p>\u2022 \u63a5\u6536\u65b9\u901a\u544aSACK\u4f46\u53d1\u9001\u65b9\u6301\u7eed\u91cd\u4f20\u5b8c\u6574\u7a97\u53e3<\/p>\n<\/li>\n<li>\n<p>\u2022\u00a0\u6545\u969c\u70b9&#xff1a;\u53d1\u9001\u7aef\u672a\u5b9e\u73b0SACK\u903b\u8f91&#xff08;\u5e38\u89c1\u8001\u65e7\u8bbe\u5907&#xff09;<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>\u4e09\u3001\u8fde\u63a5\u7ec8\u6b62\u6545\u969c<\/h4>\n<h5>7. FIN\u672a\u786e\u8ba4&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-007&#xff09;<\/h5>\n<p>\u73b0\u8c61&#xff1a;\u8fde\u63a5\u957f\u671f\u5904\u4e8eFIN_WAIT\u72b6\u6001<br \/>\n\u6293\u5305\u7b56\u7565&#xff1a;<\/p>\n<p>(tcp.flags.fin &#061;&#061; 1) and !(tcp.flags.ack &#061;&#061; 1) \u00a0# \u672a\u786e\u8ba4\u7684FIN<\/p>\n<ul>\n<li>\n<p>\u2022 \u53d1\u8d77\u65b9\u53d1\u9001FIN\u540e\u672a\u6536\u5230ACK<\/p>\n<\/li>\n<li>\n<p>\u2022\u00a0\u5173\u8054\u5206\u6790&#xff1a;\u9632\u706b\u5899\u963b\u65adFIN\u5305&#xff08;\u5c24\u5176\u8de8\u5b89\u5168\u57df&#xff09;<\/p>\n<\/li>\n<\/ul>\n<h5>8. RST\u66b4\u529b\u4e2d\u65ad&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-008&#xff09;<\/h5>\n<p>\u9ad8\u7ea7\u8fc7\u6ee4&#xff1a;<\/p>\n<p>tcp.flags.reset &#061;&#061; 1 and tcp.seq &gt; 1 \u00a0# \u975e\u63e1\u624b\u9636\u6bb5RST<\/p>\n<p>\u6839\u56e0\u77e9\u9635&#xff1a;<\/p>\n<table>\n<tr>\n<td>\n<p>RST\u53d1\u8d77\u65b9<\/p>\n<\/td>\n<td>\n<p>\u5e38\u89c1\u539f\u56e0<\/p>\n<\/td>\n<\/tr>\n<tbody>\n<tr>\n<td>\n<p>\u5ba2\u6237\u7aef<\/p>\n<\/td>\n<td>\n<p>\u5e94\u7528\u8d85\u65f6\/\u7528\u6237\u5f3a\u5236\u5173\u95ed<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u670d\u52a1\u7aef<\/p>\n<\/td>\n<td>\n<p>\u534f\u8bae\u4e0d\u517c\u5bb9\/\u5185\u5b58\u6ea2\u51fa<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u4e2d\u95f4\u8bbe\u5907<\/p>\n<\/td>\n<td>\n<p>\u4f1a\u8bdd\u8d85\u65f6\/\u7b56\u7565\u963b\u65ad<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u56db\u3001\u534f\u8bae\u6808\u5f02\u5e38<\/h4>\n<h5>9. \u6821\u9a8c\u548c\u9519\u8bef&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-009&#xff09;<\/h5>\n<p>\u5173\u952e\u914d\u7f6e&#xff1a;<br \/>\n\u7f16\u8f91 \u2192 \u9996\u9009\u9879 \u2192 Protocols \u2192 TCP \u2192 \u53d6\u6d88&#034;Validate checksum&#034;<br \/>\n\u6545\u969c\u6807\u8bc6&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u2022 \u5305\u5217\u8868[Checksum Incorrect]\u8b66\u544a<\/p>\n<\/li>\n<li>\n<p>\u2022 \u4e13\u5bb6\u7cfb\u7edf[Bad TCP]\u9519\u8bef<\/p>\n<\/li>\n<\/ul>\n<h5>10. \u7a97\u53e3\u7f29\u653e\u5931\u6548&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-010&#xff09;<\/h5>\n<p>\u73b0\u8c61&#xff1a;\u5343\u5146\u94fe\u8def\u4f20\u8f93\u901f\u7387\u4e0d\u8db3\u767e\u5146<br \/>\n\u8bca\u65ad\u6b65\u9aa4&#xff1a;<\/p>\n<li>1. \u8fc7\u6ee4\u63e1\u624b\u9636\u6bb5Window Scale\u9009\u9879&#xff1a;\n<p>tcp.options.wscale\n<\/li>\n<li>\n<p>2. \u786e\u8ba4\u53cc\u65b9\u534f\u5546\u503c\u975e0&#xff08;\u672a\u7981\u7528\u7f29\u653e&#xff09;<br \/>\n\u907f\u5751\u70b9&#xff1a;\u4e2d\u95f4\u8bbe\u5907\u5265\u79bbTCP\u9009\u9879\u5bfc\u81f4\u534f\u5546\u5931\u8d25<\/p>\n<\/li>\n<hr \/>\n<h4>\u4e94\u3001\u9ad8\u7ea7\u8bca\u65ad\u6280\u672f<\/h4>\n<h5>11. \u541e\u5410\u91cf\u9aa4\u964d\u5b9a\u4f4d&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-011&#xff09;<\/h5>\n<p>\u7ec4\u5408\u5206\u6790\u6cd5&#xff1a;<\/p>\n<li>\n<p>1.\u00a0I\/O Graph&#xff1a;\u53d1\u73b0\u541e\u5410\u91cf\u65ad\u5d16\u4e0b\u8dcc\u65f6\u95f4\u70b9<\/p>\n<\/li>\n<li>\n<p>2.\u00a0Time-Sequence Graph&#xff1a;\u5b9a\u4f4d\u5177\u4f53\u8fde\u63a5<\/p>\n<\/li>\n<li>3.\u00a0\u8fc7\u6ee4\u91cd\u4f20&#043;\u96f6\u7a97\u53e3&#xff1a;\n<p>tcp.analysis.retransmission or tcp.window_size &#061;&#061; 0\n<\/li>\n<h5>12. \u5e94\u7528\u5c42\u8d85\u65f6\u6eaf\u6e90&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-012&#xff09;<\/h5>\n<p>\u573a\u666f&#xff1a;\u6570\u636e\u5e93\u67e5\u8be2\u95f4\u6b47\u6027\u8d85\u65f6<br \/>\n\u64cd\u4f5c\u94fe&#xff1a;<\/p>\n<li>\n<p>1. \u6355\u83b7\u8d85\u65f6\u65f6\u523b\u6d41\u91cf<\/p>\n<\/li>\n<li>2. \u8fc7\u6ee4\u7279\u5b9a\u8fde\u63a5&#xff1a;\n<p>tcp.stream eq 12 \u00a0# \u66ff\u6362\u4e3a\u5b9e\u9645\u6d41\u7f16\u53f7\n<\/li>\n<li>\n<p>3. \u68c0\u67e5[Time since previous frame]\u5217<\/p>\n<ul>\n<li>\n<p>\u2022 \u670d\u52a1\u7aef\u54cd\u5e94\u5ef6\u8fdf &gt; \u5e94\u7528\u8d85\u65f6\u9608\u503c<\/p>\n<\/li>\n<li>\n<p>\u2022 \u7f51\u7edc\u65e0\u4e22\u5305\/\u91cd\u4f20<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<h5>13. MTU\u9ed1\u6d1e\u95ee\u9898&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-013&#xff09;<\/h5>\n<p>\u73b0\u8c61&#xff1a;\u5927\u6587\u4ef6\u4f20\u8f93\u5fc5\u5931\u8d25<br \/>\nWireshark\u94c1\u8bc1&#xff1a;<\/p>\n<p>icmp.type &#061;&#061; 3 and icmp.code &#061;&#061; 4 \u00a0# \u9700\u5206\u7247\u4f46DF\u7f6e\u4f4d<\/p>\n<ul>\n<li>\n<p>\u2022 \u4e2d\u95f4\u8def\u7531\u5668\u8fd4\u56deFragmentation Needed\u7684ICMP<\/p>\n<\/li>\n<li>\n<p>\u2022 \u53d1\u9001\u7aef\u672a\u6536\u5230&#xff08;\u88ab\u9632\u706b\u5899\u4e22\u5f03&#xff09;<\/p>\n<\/li>\n<\/ul>\n<h5>14. TCP\u7c98\u5305\u62c6\u5305\u5f02\u5e38&#xff08;\u6848\u4f8b\u53f7&#xff1a;TCP-014&#xff09;<\/h5>\n<p>\u5e94\u7528\u5c42\u8bca\u65ad&#xff1a;<\/p>\n<li>\n<p>1. \u5f00\u542fAllow subdissector to reassemble TCP streams<\/p>\n<\/li>\n<li>2. \u8ffd\u8e2a\u7279\u5b9a\u6d41\u5e94\u7528\u6570\u636e&#xff1a;\n<p>tcp.stream eq 5 and (http or mysql)\n<\/li>\n<li>\n<p>3. \u68c0\u67e5\u5355\u5e27\u8f7d\u8377\u957f\u5ea6\u8d85\u8fc7\u5e94\u7528\u7f13\u51b2\u533a<\/p>\n<\/li>\n<hr \/>\n<h4>\u4ece\u6570\u636e\u5305\u770b\u5230\u95ee\u9898\u672c\u8d28<\/h4>\n<p>Wireshark\u5bf9TCP\u7684\u6df1\u5ea6\u89e3\u6790\u80fd\u529b&#xff0c;\u4f7f\u5176\u6210\u4e3a\u7f51\u7edc\u6545\u969c\u8bca\u65ad\u7684\u201c\u7535\u5b50\u663e\u5fae\u955c\u201d\u3002\u901a\u8fc7\u672c\u658714\u4e2a\u5178\u578b\u6848\u4f8b\u53ef\u89c1&#xff1a;<\/p>\n<li>\n<p>1.\u00a0\u7cbe\u51c6\u8fc7\u6ee4\u662f\u57fa\u7840&#xff1a;\u638c\u63e1tcp.analysis\u8fc7\u6ee4\u5668\u65cf<\/p>\n<\/li>\n<li>\n<p>2.\u00a0\u4e13\u5bb6\u7cfb\u7edf\u662f\u6307\u5357&#xff1a;\u5173\u6ce8Warning\u7ea7\u53ca\u4ee5\u4e0a\u4e8b\u4ef6<\/p>\n<\/li>\n<li>\n<p>3.\u00a0\u65f6\u5e8f\u5206\u6790\u5b9a\u4e7e\u5764&#xff1a;\u5229\u7528IO Graph\/Time-Sequence\u5173\u8054\u6545\u969c<\/p>\n<\/li>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb419\u6b21\uff0c\u70b9\u8d5e5\u6b21\uff0c\u6536\u85cf11\u6b21\u3002\u672c\u6587\u901a\u8fc714\u4e2a\u5178\u578bTCP\u6545\u969c\u6848\u4f8b\uff0c\u7cfb\u7edf\u9610\u8ff0\u4e86Wireshark\u5728\u7f51\u7edc\u6545\u969c\u8bca\u65ad\u4e2d\u7684\u5173\u952e\u4f5c\u7528\u3002\u6848\u4f8b\u6db5\u76d6\u8fde\u63a5\u5efa\u7acb\uff08SYN\u98ce\u66b4\u3001\u7aef\u53e3\u65e0\u54cd\u5e94\uff09\u3001\u6570\u636e\u4f20\u8f93\uff08\u96f6\u7a97\u53e3\u3001\u91cd\u4f20\u98ce\u66b4\uff09\u3001\u8fde\u63a5\u7ec8\u6b62\uff08FIN\u672a\u786e\u8ba4\uff09\u7b49\u5178\u578b\u573a\u666f\uff0c\u8be6\u7ec6\u5c55\u793a\u4e86\u5982\u4f55\u5229\u7528Wireshark\u7684\u4e13\u5bb6\u7cfb\u7edf\u548c\u9ad8\u7ea7\u8fc7\u6ee4\u6280\u672f\u8fdb\u884c\u7cbe\u51c6\u5b9a\u4f4d\u3002\u6587\u7ae0\u5f3a\u8c03\u7cbe\u51c6\u8fc7\u6ee4\u3001\u4e13\u5bb6\u7cfb\u7edf\u544a\u8b66\u548c\u65f6\u5e8f\u5206\u6790\u4e09\u5927\u8bca\u65ad\u8981\u70b9\uff0c\u4e3a\u7f51\u7edc\u5de5\u7a0b\u5e08\u63d0\u4f9b\u4e86\u4ece\u6570\u636e\u5305\u5c42\u9762\u89e3\u6790TCP\u95ee\u9898\u7684\u5b9e\u7528\u65b9\u6cd5\uff0c\u582a\u79f0\u7f51\u7edc\u6545\u969c\u8bca\u65ad\u7684&quot;\u7535\u5b50\u663e\u5fae\u955c&quot;\u4f7f\u7528\u6307\u5357\u3002\uff08149\u5b57\uff09<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[205,2570,78,1185,44],"topic":[],"class_list":["post-55068","post","type-post","status-publish","format-standard","hentry","category-server","tag-tcp-ip","tag-wireshark","tag-78","tag-1185","tag-44"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - 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