{"id":89,"date":"2021-01-14T18:20:20","date_gmt":"2021-01-14T10:20:20","guid":{"rendered":"http:\/\/www.cygzs.net\/?p=89"},"modified":"2021-01-14T18:20:20","modified_gmt":"2021-01-14T10:20:20","slug":"%e4%b8%80%e4%ba%9b%e7%94%a8%e6%88%b7%e6%97%a0%e6%b3%95%e8%ae%bf%e9%97%ae%e7%bd%91%e7%ab%99%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.cygzs.net\/?p=89","title":{"rendered":"\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898\uff0c\u7ecf\u8fc7\u5206\u6790\u8bd5\u9a8c\uff0c\u6700\u7ec8\u786e\u8ba4\u548cproc\u53c2\u6570tcp_tw_recycle\/tcp_timestamps\u76f8\u5173\uff1b<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">1. \u73b0\u8c61<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u4e2a\u73b0\u8c61\uff1a\u6a21\u5757A\u901a\u8fc7NAT\u7f51\u5173\u8bbf\u95ee\u670d\u52a1S\u6210\u529f\uff0c\u800c\u6a21\u5757B\u901a\u8fc7NAT\u7f51\u5173\u8bbf\u95ee\u670d\u52a1S\u7ecf\u5e38\u6027\u51fa\u73b0connect\u5931\u8d25\uff0c\u6293\u5305\u53d1\u73b0\uff1a\u670d\u52a1S\u7aef\u5df2\u7ecf\u6536\u5230\u4e86syn\u5305\uff0c\u4f46\u6ca1\u6709\u56de\u590dsynack\uff1b\u53e6\u5916\uff0c\u6a21\u5757A\u5173\u95ed\u4e86tcptimestamp\uff0c\u800c\u6a21\u5757B\u5f00\u542f\u4e86tcp timestamp\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u4e2a\u73b0\u8c61\uff1a\u4e0d\u540c\u4e3b\u673a\u4e0a\u7684\u6a21\u5757C\uff08\u5f00\u542ftimestamp\uff09\uff0c\u901a\u8fc7NAT\u7f51\u5173\uff081\u4e2a\u51fa\u53e3ip\uff09\u8bbf\u95ee\u540c\u4e00\u670d\u52a1S\uff0c\u4e3b\u673aC1connect\u6210\u529f\uff0c\u800c\u4e3b\u673aC2 connect\u5931\u8d25\uff1b<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">2. \u5206\u6790<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u6839\u636e\u73b0\u8c61\u4e0a\u8ff0\u95ee\u9898\u660e\u663e\u548ctcp timestmap\u6709\u5173\uff1b\u67e5\u770blinux2.6.32\u5185\u6838\u6e90\u7801\uff0c\u53d1\u73b0tcp_tw_recycle\/tcp_timestamps\u90fd\u5f00\u542f\u7684\u6761\u4ef6\u4e0b\uff0c60s\u5185\u540c\u4e00\u6e90ip\u4e3b\u673a\u7684socketconnect\u8bf7\u6c42\u4e2d\u7684timestamp\u5fc5\u987b\u662f\u9012\u589e\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6e90\u7801\u51fd\u6570\uff1a<\/strong>tcp_v4_conn_request(),\u8be5\u51fd\u6570\u662ftcp\u5c42\u4e09\u6b21\u63e1\u624bsyn\u5305\u7684\u5904\u7406\u51fd\u6570\uff08\u670d\u52a1\u7aef\uff09\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6e90\u7801\u7247\u6bb5\uff1a<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">if (tmp_opt.saw_tstamp &amp;&amp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">tcp_death_row.sysctl_tw_recycle&amp;&amp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(dst = inet_csk_route_req(sk, req)) != NULL&amp;&amp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(peer = rt_get_peer((struct rtable *)dst)) != NULL&amp;&amp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">peer-&gt;v4daddr == saddr) {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">if (get_seconds() &lt;peer-&gt;tcp_ts_stamp + TCP_PAWS_MSL&amp;&amp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(s32)(peer-&gt;tcp_ts -req-&gt;ts_recent) &gt;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TCP_PAWS_WINDOW) {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NET_INC_STATS_BH(sock_net(sk),LINUX_MIB_PAWSPASSIVEREJECTED);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">goto drop_and_release;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">tmp_opt.saw_tstamp\uff1a\u8be5socket\u652f\u6301tcp_timestamp<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sysctl_tw_recycle\uff1a\u672c\u673a\u7cfb\u7edf\u5f00\u542ftcp_tw_recycle\u9009\u9879<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TCP_PAWS_MSL\uff1a60s\uff0c\u8be5\u6761\u4ef6\u5224\u65ad\u8868\u793a\u8be5\u6e90ip\u7684\u4e0a\u6b21tcp\u901a\u8baf\u53d1\u751f\u572860s\u5185<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TCP_PAWS_WINDOW\uff1a1\uff0c\u8be5\u6761\u4ef6\u5224\u65ad\u8868\u793a\u8be5\u6e90ip\u7684\u4e0a\u6b21tcp\u901a\u8baf\u7684timestamp \u5927\u4e8e\u672c\u6b21tcp<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5206\u6790\uff1a<\/strong>\u4e3b\u673aclient1\u548cclient2\u901a\u8fc7NAT\u7f51\u5173\uff081\u4e2aip\u5730\u5740\uff09\u8bbf\u95eeserverN\uff0c\u7531\u4e8etimestamp\u65f6\u95f4\u4e3a\u7cfb\u7edf\u542f\u52a8\u5230\u5f53\u524d\u7684\u65f6\u95f4\uff0c\u56e0\u6b64\uff0cclient1\u548cclient2\u7684timestamp\u4e0d\u76f8\u540c\uff1b\u6839\u636e\u4e0a\u8ff0syn\u5305\u5904\u7406\u6e90\u7801\uff0c\u5728tcp_tw_recycle\u548ctcp_timestamps\u540c\u65f6\u5f00\u542f\u7684\u6761\u4ef6\u4e0b\uff0ctimestamp\u5927\u7684\u4e3b\u673a\u8bbf\u95eeserverN\u6210\u529f\uff0c\u800ctimestmap\u5c0f\u7684\u4e3b\u673a\u8bbf\u95ee\u5931\u8d25\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u53c2\u6570<\/strong><strong>\uff1a<\/strong>\/proc\/sys\/net\/ipv4\/tcp_timestamps- \u63a7\u5236timestamp\u9009\u9879\u5f00\u542f\/\u5173\u95ed<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\/proc\/sys\/net\/ipv4\/tcp_tw_recycle &#8211; \u51cf\u5c11timewait socket\u91ca\u653e\u7684\u8d85\u65f6\u65f6\u95f4<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">3. \u89e3\u51b3\u65b9\u6cd5<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">echo 0 &gt; \/proc\/sys\/net\/ipv4\/tcp_tw_recycle;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">tcp_tw_recycle\u9ed8\u8ba4\u662f\u5173\u95ed\u7684\uff0c\u6709\u4e0d\u5c11\u670d\u52a1\u5668\uff0c\u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u5f00\u542f\u4e86\u8be5\u9009\u9879\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u89e3\u51b3\u4e0a\u8ff0\u95ee\u9898\uff0c\u4e2a\u4eba\u5efa\u8bae\u5173\u95edtcp_tw_recycle\u9009\u9879\uff0c\u800c\u4e0d\u662ftimestamp\uff1b\u56e0\u4e3a \u5728tcptimestamp\u5173\u95ed\u7684\u6761\u4ef6\u4e0b\uff0c\u5f00\u542ftcp_tw_recycle\u662f\u4e0d\u8d77\u4f5c\u7528\u7684\uff1b\u800ctcptimestamp\u53ef\u4ee5\u72ec\u7acb\u5f00\u542f\u5e76\u8d77\u4f5c\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6e90\u7801\u51fd\u6570\uff1a<\/strong>&nbsp;tcp_time_wait()<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6e90\u7801\u7247\u6bb5\uff1a<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">if (tcp_death_row.sysctl_tw_recycle&amp;&amp;tp-&gt;rx_opt.ts_recent_stamp)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">recycle_ok =icsk-&gt;icsk_af_ops-&gt;remember_stamp(sk);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8230;&#8230;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">if (timeo &lt; rto)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">timeo = rto;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">if (recycle_ok) {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">tw-&gt;tw_timeout = rto;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">} else {<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">tw-&gt;tw_timeout = TCP_TIMEWAIT_LEN;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">if (state == TCP_TIME_WAIT)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">timeo = TCP_TIMEWAIT_LEN;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">inet_twsk_schedule(tw, &amp;tcp_death_row,timeo,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TCP_TIMEWAIT_LEN);<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">timestamp\u548ctw_recycle\u540c\u65f6\u5f00\u542f\u7684\u6761\u4ef6\u4e0b\uff0ctimewait\u72b6\u6001socket\u91ca\u653e\u7684\u8d85\u65f6\u65f6\u95f4\u548crto\u76f8\u5173\uff1b\u5426\u5219\uff0c\u8d85\u65f6\u65f6\u95f4\u4e3aTCP_TIMEWAIT_LEN\uff0c\u537360s\uff1b<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u5185\u6838\u8bf4\u660e\u6587\u6863 \u5bf9\u8be5\u53c2\u6570\u7684\u4ecb\u7ecd\u5982\u4e0b\uff1a<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">tcp_tw_recycle &#8211; BOOLEAN<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Enable fast recycling TIME-WAIT sockets. Default value is 0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It should not be changed without advice\/request of technical<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">experts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e00\u4e9b\u9ad8\u5e76\u53d1\u7684 WebServer\u4e0a\uff0c\u4e3a\u4e86\u7aef\u53e3\u80fd\u591f\u5feb\u901f\u56de\u6536\uff0c\u6253\u5f00\u4e86net.ipv4.tcp_tw_recycle\uff0c\u800c\u5728\u5173\u95ednet.ipv4.tcp_tw_recycle\u7684\u65f6\u5019\uff0ckernal \u662f\u4e0d\u4f1a\u68c0\u67e5\u5bf9\u7aef\u673a\u5668\u7684\u5305\u7684\u65f6\u95f4\u6233\u7684\uff1b\u6253\u5f00\u4e86tcp_tw_reccycle\u4e86\uff0c\u5c31\u4f1a\u68c0\u67e5\u65f6\u95f4\u6233\uff0c\u5f88\u4e0d\u5e78\u79fb\u52a8\u7684cmwap\u53d1\u6765\u7684\u5305\u7684\u65f6\u95f4\u6233\u662f\u4e71\u8df3\u7684\uff0c\u6240\u4ee5\u670d\u52a1\u5668\u5c31\u628a\u5e26\u4e86\u201c\u5012\u9000\u201d\u7684\u65f6\u95f4\u6233\u7684\u5305\u5f53\u4f5c\u662f\u201crecycle\u7684tw\u8fde\u63a5\u7684\u91cd\u4f20\u6570\u636e\uff0c\u4e0d\u662f\u65b0\u7684\u8bf7\u6c42\u201d\uff0c\u4e8e\u662f\u4e22\u6389\u4e0d\u56de\u5305\uff0c\u9020\u6210\u5927\u91cf\u4e22\u5305\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e24\u5929\u5728\u5904\u7406\u4e00\u4e2a\u65b0\u7b7e\u5ba2\u6237\u7684\u53e4\u602a\u95ee\u9898\uff0c\u5206\u652f\u673a\u6784\u5927\u90e8\u5206\u7528\u6237\u90fd\u80fd\u8bbf\u95ee\uff0c\u4f46\u5c11\u6570\u7528\u6237\u65f6\u800c\u80fd\u8bbf\u95ee\u65f6\u800c\u4e0d\u884c\uff0c\u901a\u8fc7\u7f29\u5c0f\u6545\u969c\u5305\u56f4\u5708\uff0c\u76ee\u524d\u521d\u6b65\u63a2\u660e\u662f\u5185\u6838\u53c2\u6570net.ipv4.tcp_tw_recycle = 1\u7684\u95ee\u9898\uff0c\u8bbe\u7f6e\u4e3a0\u540e\u521d\u6b65\u89e3\u9664\u6545\u969c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u6b64\u6b21\u6545\u969c\uff0c\u8b66\u793a\u6211\u4eec\u5728\u8fdb\u884c\u65e5\u5e38\u7a0b\u5e8f\uff0c\u7cfb\u7edf\u7b49\u53d8\u66f4\uff0c\u4fee\u6539\uff0c\u91cd\u542f\u7b49\u7684\u64cd\u4f5c\u4e0a\uff0c\u9700\u8981\u6211\u4eec\u4e25\u683c\u6309\u7167\u6d41\u7a0b\u4ed4\u7ec6\u53bb\u8fdb\u884c\u6d4b\u8bd5\uff0c\u8bc4\u4f30\u4fee\u6539\u540e\u7684\u98ce\u9669\u53ca\u51fa\u73b0\u95ee\u9898\u56de\u9000\u548c\u89e3\u51b3\u65b9\u6cd5\uff1b\u7279\u522b\u662f\u5bf9\u5185\u6838\u53c2\u6570\u7684\u4fee\u6539\u4e00\u5b9a\u8981\u7406\u89e3\u900f\u5f7b\uff0c\u4e0d\u80fd\u76f2\u76ee\u4fee\u6539\u3002\u7136\u540e\u8fdb\u884c\u9010\u6b65\u53d1\u5e03\uff0c\u907f\u514d\u6545\u969c\u5f71\u54cd\u5168\u5c40\u3002\u5c3d\u91cf\u8ba9\u6545\u969c\u7387\u964d\u4f4e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">echo 0 &gt;\/proc\/sys\/net\/ipv4\/tcp_tw_recycle;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sysctl -p<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898\uff0c\u7ecf\u8fc7\u5206\u6790\u8bd5\u9a8c\uff0c\u6700\u7ec8\u786e\u8ba4\u548cproc\u53c2\u6570tcp_tw_recycle\/tcp_timestamps\u76f8\u5173\uff1b 1. \u73b0\u8c61 \u7b2c\u4e00\u4e2a\u73b0\u8c61\uff1a\u6a21\u5757A\u901a\u8fc7NAT\u7f51\u5173\u8bbf\u95ee\u670d\u52a1S\u6210\u529f\uff0c\u800c\u6a21\u5757B\u901a\u8fc7NAT\u7f51\u5173\u8bbf\u95ee\u670d\u52a1S\u7ecf\u5e38\u6027\u51fa\u73b0connect\u5931\u8d25\uff0c\u6293\u5305\u53d1\u73b0\uff1a\u670d\u52a1S\u7aef\u5df2\u7ecf\u6536\u5230\u4e86syn\u5305\uff0c\u4f46\u6ca1\u6709\u56de\u590dsynack\uff1b\u53e6\u5916\uff0c\u6a21\u5757A\u5173\u95ed\u4e86tcptimestamp\uff0c\u800c\u6a21\u5757B\u5f00\u542f\u4e86tcp timestamp\uff1b&hellip; <a class=\"more-link\" href=\"https:\/\/www.cygzs.net\/?p=89\">(more)<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_owldraft_subtitle":"","footnotes":""},"categories":[8,1],"tags":[],"class_list":["post-89","post","type-post","status-publish","format-standard","hentry","category-centos","category-it"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898 - \u7433\u6d77\u5bb6\u56ed<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cygzs.net\/?p=89\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898 - \u7433\u6d77\u5bb6\u56ed\" \/>\n<meta property=\"og:description\" content=\"\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898\uff0c\u7ecf\u8fc7\u5206\u6790\u8bd5\u9a8c\uff0c\u6700\u7ec8\u786e\u8ba4\u548cproc\u53c2\u6570tcp_tw_recycle\/tcp_timestamps\u76f8\u5173\uff1b 1. \u73b0\u8c61 \u7b2c\u4e00\u4e2a\u73b0\u8c61\uff1a\u6a21\u5757A\u901a\u8fc7NAT\u7f51\u5173\u8bbf\u95ee\u670d\u52a1S\u6210\u529f\uff0c\u800c\u6a21\u5757B\u901a\u8fc7NAT\u7f51\u5173\u8bbf\u95ee\u670d\u52a1S\u7ecf\u5e38\u6027\u51fa\u73b0connect\u5931\u8d25\uff0c\u6293\u5305\u53d1\u73b0\uff1a\u670d\u52a1S\u7aef\u5df2\u7ecf\u6536\u5230\u4e86syn\u5305\uff0c\u4f46\u6ca1\u6709\u56de\u590dsynack\uff1b\u53e6\u5916\uff0c\u6a21\u5757A\u5173\u95ed\u4e86tcptimestamp\uff0c\u800c\u6a21\u5757B\u5f00\u542f\u4e86tcp timestamp\uff1b&hellip; (more)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cygzs.net\/?p=89\" \/>\n<meta property=\"og:site_name\" content=\"\u7433\u6d77\u5bb6\u56ed\" \/>\n<meta property=\"article:published_time\" content=\"2021-01-14T10:20:20+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"cy\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.cygzs.net\/#website\",\"url\":\"https:\/\/www.cygzs.net\/\",\"name\":\"\\u7433\\u6d77\\u5bb6\\u56ed\",\"description\":\"\\u4e00\\u4e2a\\u4e0d\\u52a1\\u6b63\\u4e1a\\u7684\\u8fd0\\u7ef4\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.cygzs.net\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.cygzs.net\/?p=89#webpage\",\"url\":\"https:\/\/www.cygzs.net\/?p=89\",\"name\":\"\\u4e00\\u4e9b\\u7528\\u6237\\u65e0\\u6cd5\\u8bbf\\u95ee\\u7f51\\u7ad9\\u7684\\u95ee\\u9898 - \\u7433\\u6d77\\u5bb6\\u56ed\",\"isPartOf\":{\"@id\":\"https:\/\/www.cygzs.net\/#website\"},\"datePublished\":\"2021-01-14T10:20:20+00:00\",\"dateModified\":\"2021-01-14T10:20:20+00:00\",\"author\":{\"@id\":\"https:\/\/www.cygzs.net\/#\/schema\/person\/6db5162177413ff7529e7d15140c864a\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.cygzs.net\/?p=89#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.cygzs.net\/?p=89\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.cygzs.net\/?p=89#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\\u9996\\u9875\",\"item\":\"https:\/\/www.cygzs.net\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\\u4e00\\u4e9b\\u7528\\u6237\\u65e0\\u6cd5\\u8bbf\\u95ee\\u7f51\\u7ad9\\u7684\\u95ee\\u9898\"}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.cygzs.net\/#\/schema\/person\/6db5162177413ff7529e7d15140c864a\",\"name\":\"cy\",\"sameAs\":[\"http:\/\/www.cygzs.net\"],\"url\":\"https:\/\/www.cygzs.net\/?author=1\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898 - \u7433\u6d77\u5bb6\u56ed","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.cygzs.net\/?p=89","og_locale":"zh_CN","og_type":"article","og_title":"\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898 - \u7433\u6d77\u5bb6\u56ed","og_description":"\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898\uff0c\u7ecf\u8fc7\u5206\u6790\u8bd5\u9a8c\uff0c\u6700\u7ec8\u786e\u8ba4\u548cproc\u53c2\u6570tcp_tw_recycle\/tcp_timestamps\u76f8\u5173\uff1b 1. \u73b0\u8c61 \u7b2c\u4e00\u4e2a\u73b0\u8c61\uff1a\u6a21\u5757A\u901a\u8fc7NAT\u7f51\u5173\u8bbf\u95ee\u670d\u52a1S\u6210\u529f\uff0c\u800c\u6a21\u5757B\u901a\u8fc7NAT\u7f51\u5173\u8bbf\u95ee\u670d\u52a1S\u7ecf\u5e38\u6027\u51fa\u73b0connect\u5931\u8d25\uff0c\u6293\u5305\u53d1\u73b0\uff1a\u670d\u52a1S\u7aef\u5df2\u7ecf\u6536\u5230\u4e86syn\u5305\uff0c\u4f46\u6ca1\u6709\u56de\u590dsynack\uff1b\u53e6\u5916\uff0c\u6a21\u5757A\u5173\u95ed\u4e86tcptimestamp\uff0c\u800c\u6a21\u5757B\u5f00\u542f\u4e86tcp timestamp\uff1b&hellip; (more)","og_url":"https:\/\/www.cygzs.net\/?p=89","og_site_name":"\u7433\u6d77\u5bb6\u56ed","article_published_time":"2021-01-14T10:20:20+00:00","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"cy","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"2 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebSite","@id":"https:\/\/www.cygzs.net\/#website","url":"https:\/\/www.cygzs.net\/","name":"\u7433\u6d77\u5bb6\u56ed","description":"\u4e00\u4e2a\u4e0d\u52a1\u6b63\u4e1a\u7684\u8fd0\u7ef4","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.cygzs.net\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"WebPage","@id":"https:\/\/www.cygzs.net\/?p=89#webpage","url":"https:\/\/www.cygzs.net\/?p=89","name":"\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898 - \u7433\u6d77\u5bb6\u56ed","isPartOf":{"@id":"https:\/\/www.cygzs.net\/#website"},"datePublished":"2021-01-14T10:20:20+00:00","dateModified":"2021-01-14T10:20:20+00:00","author":{"@id":"https:\/\/www.cygzs.net\/#\/schema\/person\/6db5162177413ff7529e7d15140c864a"},"breadcrumb":{"@id":"https:\/\/www.cygzs.net\/?p=89#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.cygzs.net\/?p=89"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.cygzs.net\/?p=89#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.cygzs.net\/"},{"@type":"ListItem","position":2,"name":"\u4e00\u4e9b\u7528\u6237\u65e0\u6cd5\u8bbf\u95ee\u7f51\u7ad9\u7684\u95ee\u9898"}]},{"@type":"Person","@id":"https:\/\/www.cygzs.net\/#\/schema\/person\/6db5162177413ff7529e7d15140c864a","name":"cy","sameAs":["http:\/\/www.cygzs.net"],"url":"https:\/\/www.cygzs.net\/?author=1"}]}},"_links":{"self":[{"href":"https:\/\/www.cygzs.net\/index.php?rest_route=\/wp\/v2\/posts\/89","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cygzs.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cygzs.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cygzs.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cygzs.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=89"}],"version-history":[{"count":1,"href":"https:\/\/www.cygzs.net\/index.php?rest_route=\/wp\/v2\/posts\/89\/revisions"}],"predecessor-version":[{"id":90,"href":"https:\/\/www.cygzs.net\/index.php?rest_route=\/wp\/v2\/posts\/89\/revisions\/90"}],"wp:attachment":[{"href":"https:\/\/www.cygzs.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=89"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cygzs.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=89"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cygzs.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}