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Googleã®TCP BBRã§TCPを高速化ã—Proxyã‚‚ãã®æ©æµã«ã‚ãšã‹ã‚‹ - Qiita
TCP BBR(以下BBRã¨ç•¥ã—ã¾ã™)ã¯ã€GoogleãŒæ–°ã—ã開発ã—ãŸTCPを高速化ã™ã‚‹ãŸã‚ã®è¼»è¼³(ãµããã†)制御アルゴリズムã§ã™ã€‚ GitHub/google/bbrã®ãƒ—レゼン資料(PDF) Google Cloud Platform Japan å…¬å¼ãƒ–ãƒã‚° 上記資料ã«ã‚‚ã‚る通りã€YouTubeã«æŽ¡ç”¨ã—ãŸçµæžœã€ä¸€éƒ¨ã®å›½ã§ã‚¹ãƒ«ãƒ¼ãƒ—ットを14%以上も引ã上ã’ãŸå®Ÿç¸¾ãŒã‚ã‚‹ã¨ã®äº‹ãªã®ã§ã€å…ˆæ—¥æ§‹ç¯‰ã—ãŸProxy(Qiita記事)ã®ã‚µãƒ¼ãƒãƒ¼ã¸å°Žå…¥ã—ã¦ã¿ã‚‹äº‹ã«ã—ã¾ã—ãŸã€‚ 上記Qiitaã®è¨˜äº‹ã§ã¯ã€Shadowsocksã¨ã„ã†æ—¥æœ¬ã§ã¯çŸ¥å度ã®ä½Žã„仕組ã¿ã‚’採用ã—ã¦ã„ã¾ã™ãŒã€Squidã§Proxyを構築ã—ã¦ã„る方やApacheã§Webサーãƒã‚’構築ã—ã¦ã„ã‚‹æ–¹ãªã©ã«ã‚‚ã€èˆˆå‘³ã‚’æŒã£ã¦ã„ãŸã ã‘ãŸã‚‰å¹¸ã„ã§ã™ã€‚ 対象ã¨ã—ã¦ã„る人 最低é™ã®Linuxã®çŸ¥è˜ãŒã‚りテスト環境を構築ã§ãる人1 手軽ã«æœ€æ–°ã®æŠ€è¡“ã«è§¦ã‚Œã¦ã¿ãŸã„人
Linuxã®TCP SYNã®å†é€é–“éš”ã®åˆæœŸå€¤ãŒ3秒ã‹ã‚‰1秒ã«å¤‰æ›´ã•ã‚Œã¦ã„㟠- å…ƒRX-7ä¹—ã‚Šã®é©å½“ãªæ—¥ã€…
ã¨ã„ã†ã“ã¨ã«ã€(今更？)気付ã„ãŸãŠè©±ã§ã™ã€‚ HAを組んã éš›ã®VIPã®åˆ‡ã‚Šæ›¿ãˆãƒ†ã‚¹ãƒˆã‚’ã‚„ã£ã¦ã„ã‚‹ã¨ãã«ã€é«˜è² è·æ™‚ã¨ã‹ã¯åˆ‡ã‚Šæ›¿ãˆã«7秒ã´ã£ãŸã‚Šã‹ã‹ã‚‹ã‚±ãƒ¼ã‚¹ã¨ã‹ãŒã‚ã£ã¦ã€7秒ã£ã¦ä½•ã®æ•°å—ã ã‚ã†ã¨ç–‘å•ã‚’æŒã¡ã¾ã—ãŸã€‚ OSã¯ã€CentOS 6.4(2.6.32-358.23.2.el6.x86_64)ã§ã™ã€‚ TCP SYNã®å†é€é–“éš”ãŒã€1...2...4...秒ã«ãªã£ã¦ã„ã‚‹ ã§ã€tcpdumpを眺ã‚ã¦ã„ã‚‹ã¨ä»¥ä¸‹ã®ã‚ˆã†ãªã‚·ãƒ¼ã‚±ãƒ³ã‚¹ã§ã™ã€‚ 11:50:35.689301 IP client-host.8957 > server-host.http: Flags [S], seq 1616681830, win 14600, options [mss 1460,sackOK,TS val 889880946 ecr 0,nop,wscale 7], length 0 11:50:36.688503 IP
TCPを（少ã—ã¯ï¼‰ç†è§£ã—ã¦ãŠãã¹ããã®ç†ç”± | POSTD
ã“ã®è¨˜äº‹ã¯TCP㮠全㦠をç†è§£ã™ã‚‹ã€ã‚ã‚‹ã„㯠『TCP/IP Illustrated〠（訳注：日本語版: 『詳解TCP/IP〈Vol.1〉プãƒãƒˆã‚³ãƒ«ã€ ）をèªç ´ã—よã†ã¨ã‹ã€ãã†ã„ã†ã“ã¨ã§ã¯ã‚ã‚Šã¾ã›ã‚“。ã»ã‚“ã®å°‘ã—ã®TCPã®çŸ¥è˜ãŒã©ã‚Œã»ã©æ¬ ã‹ã›ãªã„ã‚‚ã®ãªã®ã‹ã«ã¤ã„ã¦ãŠè©±ã—ã¾ã™ã€‚ã¾ãšã¯ãã®ç†ç”±ã‚’ãŠè©±ã—ã¾ã—ょã†ã€‚ ç§ãŒ Recurse Center ã§åƒã„ã¦ã„ã‚‹ã¨ãã€Pythonã§TCPスタックを書ãã¾ã—ãŸï¼ˆ ã¾ãŸPythonã§TCPスタックを書ã„ãŸã‚‰ã©ã†ãªã‚‹ã‹ã«ã¤ã„ã¦ã‚‚書ãã¾ã—㟠）。ãã‚Œã¯ã¨ã¦ã‚‚楽ã—ãã€ãŸã‚ã«ãªã‚‹çµŒé¨“ã§ã—ãŸã€‚ã¾ãŸãã‚Œã§ã„ã„ã¨æ€ã£ã¦ã„ãŸã‚“ã§ã™ã€‚ ãã“ã‹ã‚‰1å¹´ãらã„経ã£ã¦ã€ä»•äº‹ã§ã€èª°ã‹ãŒã€ŒNSQã¸ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã‚’é€ã£ãŸã‚“ã ãŒã€æ¯Žå›ž40ミリ秒ã‹ã‹ã‚‹ã€ã¨Slackã«æŠ•ç¨¿ã—ã¦ã„ã‚‹ã®ã‚’見ã¤ã‘ã¾ã—ãŸã€‚ç§ã¯ã“ã®å•é¡Œã«ã¤ã„ã¦ã™ã§ã«1週間ã»ã©è€ƒãˆè¾¼ã‚“ã§ã„ã¾ã—ãŸãŒã€ã•ã£ã±ã‚Šç”ãˆãŒã§ã¾ã›ã‚“ã§ã—ãŸã€‚ ã“
How TCP backlog works in Linux
When an application puts a socket into LISTEN state using the listen syscall, it needs to specify a backlog for that socket. The backlog is usually described as the limit for the queue of incoming connections. Because of the 3-way handshake used by TCP, an incoming connection goes through an intermediate state SYN RECEIVED before it reaches the ESTABLISHED state and can be returned by the accept s
TCPã®RSTãŒé£›ã¶ã‚¿ã‚¤ãƒŸãƒ³ã‚°ã¨èªè¨¼ãŒå¿…è¦ãªHTTP POST: ã˜ãƒ¼ãã‚Žã„
久々ã®TCPãƒã‚¿ã€‚ TCPã®RSTã«ã¤ã„ã¦ã“ã®è¨˜äº‹ã§ã‚‚ç°¡å˜ã«è§¦ã‚ŒãŸã€‚ ã“ã®RSTãŒã©ã®ã‚ˆã†ãªã‚¿ã‚¤ãƒŸãƒ³ã‚°ã§é€ä¿¡ã•ã‚Œã‚‹ã‹ã¨ã„ã†ã¨ã€OSã®ã‚½ã‚±ãƒƒãƒˆãƒãƒƒãƒ•ã‚¡ã« å—信データãŒã¾ã 残ã£ã¦ã„ã‚‹ã«ã‚‚ã‹ã‹ã‚らãšã€ã‚¢ãƒ—リãŒcloseを実行ã—ãŸã¨ãã«é€ä¿¡ã•ã‚Œã‚‹ï¼ˆLinuxã®ãŠè©±ï¼‰ã€‚ ã¤ã¾ã‚Šã€ã¾ã å—ã‘å–ã‚‹ã¹ãデータãŒæ®‹ã£ã¦ã„ã‚‹ã«ã‚‚ã‹ã‹ã‚らãšã€æœ‰ç„¡ã‚’言ã‚ã•ãšã‚¢ãƒ—リ㌠closeを実行ã—ã¦ããŸã®ã§ã€ã“ã‚Œã¯ç•°å¸¸ãªçŠ¶æ…‹ã ã€ã¨ã„ã†ã“ã¨ã§RSTã‚’é€ä¿¡ã—〠ãã®å—ã‘å–ã‚‹ã¹ãデータをé€ã£ã¦ããŸé€ä¿¡è€…å´ã«ã€ã€Œã‚‚ã†ãƒ‡ãƒ¼ã‚¿ã¯é€ã‚‰ãªã„ã§ãã‚Œã€ã¨ä¼ãˆãŸã„ã®ã§ã‚る。 ã•ã¦ã€ã“れをè¸ã¾ãˆã¦è€ƒãˆã‚‹ã¨ã€å®Ÿã¯ä¸‹è¨˜ã®ã‚ˆã†ãªã‚±ãƒ¼ã‚¹ã§å•é¡ŒãŒç™ºç”Ÿã™ã‚‹ã€‚ マシンA（HTTPクライアント）ã¯HTTP POSTã®ãƒ˜ãƒƒãƒ€ï¼ˆä»®ã«1024ãƒã‚¤ãƒˆã¨ã™ã‚‹ï¼‰ã¨HTTP POSTã®ãƒœãƒ‡ã‚£ï¼ˆä»®ã«8192ãƒã‚¤ãƒˆã¨ã™ã‚‹ï¼‰ã‚’マシンB（HTTPサーãƒï¼‰ã«é€ä¿¡ã—ãŸã€‚ マシンBã®OSã¯ã€9
TCP Slow Start 㨠MSS, initcwnd ãªã©ã®ãƒ¡ãƒ¢
ç¾å®Ÿçš„ãªå€¤ã¨æ ¹æ‹ ãªã© Slow Start ãªã©ã®ä¾‹ã«è‰¯ã出ã¦ãã‚‹æ•°å—ã®è«–æ‹ ã¨ã€å€‹ã€…ã®å˜ä½ãŒã©ã“ã§æ±ºã¾ã£ã¦ãã‚‹ã‹ã‚’主ã«å–り扱ã†ã€‚ã¨ã„ã†ãƒ¡ãƒ¢ã€‚苦手科目ã 。_:(´ཀ`〠∠): Max Segment Size (MSS) ã®æ±ºå®š ã“ã® MSS ãŒã‚¦ã‚¤ãƒ³ãƒ‰ã‚¦ã‚µã‚¤ã‚ºï¼ˆä¸€åº¦ã«è»¢é€ã™ã‚‹ãƒ‡ãƒ¼ã‚¿ã‚µã‚¤ã‚ºï¼‰ã®å˜ä½ã¨ã—ã¦æ‰±ã‚れる。（後述） TCP コãƒã‚¯ã‚·ãƒ§ãƒ³ãŒ 3-way handshake ã«ã‚ˆã£ã¦ç¢ºç«‹ã•ã‚Œã‚‹éš›ã€ãƒŽãƒ¼ãƒ‰é–“ã§ä¸‹è¨˜ã®ã‚ˆã†ãª MSS ã«é–¢ã™ã‚‹ã‚„ã‚Šå–ã‚ŠãŒç™ºç”Ÿã™ã‚‹ã€‚ å„ノード㯠Maximum Transmission Unit (MTU) ã‹ã‚‰ TCPヘッダ20ãƒã‚¤ãƒˆã€IPヘッダ20ãƒã‚¤ãƒˆã®è¨ˆ40ãƒã‚¤ãƒˆã‚’引ã„ãŸå€¤ã‚’ MSS ã¨ã—ã¦æ示ã™ã‚‹ å„ノードã®å¸Œæœ› MSS ã®ã†ã¡ä½Žã„方をã€ãã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã«ãŠã‘ã‚‹ MSS ã¨ã™ã‚‹ ãŸã¨ãˆã°ã‚¤ãƒ¼ã‚µãƒãƒƒãƒˆã§ã¯æœ€å¤§1,500ãƒã‚¤ãƒˆï¼ˆã‚ªã‚¯ãƒ†ãƒƒãƒˆï¼‰ãŒIP通信ã«åˆ©ç”¨ã§
TCPカーãƒãƒ«ãƒ‘ラメータã«ã‚ˆã‚‹éšœå®³å¾©æ—§æ™‚é–“ã®çŸç¸® - GeekFactory
クラスタ構æˆã®ã‚µãƒ¼ãƒã§ã¯ã€éšœå®³ç™ºç”Ÿå¾Œã«ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆãŒã™ãã«å¾©æ—§ã—ãªã„å ´åˆãŒã‚ã‚Šã¾ã™ã€‚サーãƒå´ãŒãƒ•ã‚§ã‚¤ãƒ«ã‚ªãƒ¼ãƒã—ãŸå¾Œã«ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆå´ãŒå†æŽ¥ç¶šã™ã‚‹ã¾ã§ã®æ™‚é–“ã‚’çŸãã™ã‚‹æ–¹æ³•ã‚’紹介ã—ã¾ã™ã€‚ クライアントã‹ã‚‰ã‚µãƒ¼ãƒã«æŽ¥ç¶šã™ã‚‹ã¨ã‚½ã‚±ãƒƒãƒˆã¯ESTABLISHEDã«ãªã‚Šã¾ã™ã€‚ã‚‚ã—ESTABLISHEDã«ãªã£ãŸã‚½ã‚±ãƒƒãƒˆã§æ£ã—ãパケットãŒé€ä¿¡ã•ã‚Œãªã‹ã£ãŸå ´åˆã€OSã¯å†é€ã‚’試ã¿ã¾ã™ã€‚å†é€ã«å¤±æ•—ã—ã¦ã‚½ã‚±ãƒƒãƒˆã‚’クãƒãƒ¼ã‚ºã™ã‚‹ã¾ã§ã®æ™‚é–“ã¯OSã®è¨å®šã«ã‚ˆã‚Šã¾ã™ã€‚ OSãŒTCP接続ã®ç•°å¸¸ã‚’検知ã—ã¦ã‹ã‚‰ã‚¯ãƒãƒ¼ã‚ºã™ã‚‹ã¾ã§ã®æ™‚é–“ã‚’çŸãã™ã‚‹ã«ã¯3ã¤ã®æ–¹æ³•ãŒã‚ã‚Šã¾ã™ã€‚ パケットã®å†é€å›žæ•°ã‚’å°‘ãªãã™ã‚‹ã€‚ TCPレイヤã§Keep Aliveパケットをé€ä¿¡ã™ã‚‹ã€‚ã“ã®æ–¹æ³•ã¯TCP Keep Aliveã«å¯¾å¿œã—ã¦ã„るアプリã®ã¿å¯èƒ½ã€‚ アプリケーションレイヤã§Keep Aliveパケットをé€ä¿¡ã™ã‚‹ã€‚ã“ã®æ–¹æ³•ã¯Nullパケットを投ã’ã‚‹ç‰ã«å¯¾å¿œã—ã¦
入門編ï¼ãƒˆãƒ¬ãƒ¼ã‚¹ãƒ•ã‚¡ã‚¤ãƒ«è§£æž - SimulatorQualnet
QualNetã«ã¯ã€QualNet Analyzer (`RunAnalyzer`ã§èµ·å‹•)ã¨ã„ã†è§£æžç”¨ã®ãƒ„ールãŒã‚ã‚Šã€ã•ã¾ã–ã¾ãªçµ±è¨ˆæƒ…å ±ã‚’ã‚°ãƒ©ãƒ•è¡¨ç¤ºã§ãã‚‹ãŒã€ã“ã“ã§ã¯tcptraceã¨xplotを使ã†æ–¹æ³•ã‚’紹介ã™ã‚‹ã€‚ トレースファイルフォーマット record: <rec> record header: <rechdr> Originating_Node_Id msg_Seq_No Sim_Time Originating_Protocol_Id: $QUALNET_HOME/include/trace.h ã® TraceProtocolTypeå‚ç…§ Processing_Node_Id Tracing_Protocol_Id: $QUALNET_HOME/include/trace.h ã® TraceProtocolTypeå‚ç…§ Action Description: <action>
tcptrace - Official Homepage
Browse the manual online You may download the manual (in HTML) for off-line reading here : As a tar ball : manual.tar.gz As a zip archive : manual.zip You may start browsing the manual off-line from the manual/index.html file. The manual source (TeX) is also available for download here . You may need LaTeX 2e, and the latex2html program to build it from source.
TCP高速化ãªã©ã‚’図ã£ãŸLinuxカーãƒãƒ«3.6ã€ãƒªãƒªãƒ¼ã‚¹
TCP高速化ãªã©ã‚’図ã£ãŸLinuxカーãƒãƒ«3.6ã€ãƒªãƒªãƒ¼ã‚¹ï¼šä»®æƒ³ç’°å¢ƒã§ã®I/O性能を改善ã™ã‚‹VFIOã‚‚ Linuxカーãƒãƒ«ã®æ–°ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã€ã€ŒLinux 3.6ã€ãŒ10月1æ—¥ã«ãƒªãƒªãƒ¼ã‚¹ã•ã‚ŒãŸã€‚Linus Torvaldsæ°ã¯ã“ã®ãƒªãƒªãƒ¼ã‚¹ã«ã¤ã„ã¦ã€ã‚¢ãƒ¼ã‚テクãƒãƒ£ã‚„ファイルシステムã«å¤§å¹…ãªå¤‰æ›´ã¯ãªã„ã¨ã—ãªãŒã‚‰ã‚‚ã€ã€Œç€å®Ÿãªé€²æ©ã€ã ã¨è¡¨ç¾ã—ã¦ã„る。 カーãƒãƒ«3.6ã§ã¯ã€ã¾ãšãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æŽ¥ç¶šã‚’高速化ã™ã‚‹ãŸã‚ã€TCP Small Queuesã‚„TCP Fast Openã¨ã„ã£ãŸæ©Ÿèƒ½ãŒç››ã‚Šè¾¼ã¾ã‚ŒãŸã€‚TCP Small Queuesã¯ã€1ã¤ã®ã‚ューã«å«ã¾ã‚Œã‚‹ãƒ‘ケットã®æ•°ã«ä¸Šé™ã‚’è¨ã‘ã‚‹ã“ã¨ã§RTTãªã©ã‚’減らã—ã€ã²ã„ã¦ã¯ãƒãƒƒãƒ•ã‚¡ã‚µã‚¤ã‚ºã«èµ·å› ã™ã‚‹é…延や輻輳ã¨ã„ã£ãŸå•é¡Œï¼ˆBufferbloat）を解決ã™ã‚‹ã“ã¨ã‚’ç‹™ã£ãŸã‚‚ã®ã€‚一方TCP Fast Openã¯ã€TCPコãƒã‚¯ã‚·ãƒ§ãƒ³ç¢ºç«‹æ™‚ã®ãƒ—ãƒã‚»ã‚¹ã‚’最é©åŒ–ã™ã‚‹ã“ã¨ã§ã€Web
TCP Fast Open
TCP Fast Open Sivasankar Radhakrishnan, Yuchung Cheng, Jerry Chu, Arvind Jain Google [email protected], {ycheng, hkchu, arvind}@google.com Barath Raghavan ICSI [email protected] ABSTRACT Today’s web services are dominated by TCP flows so short that they terminate a few round trips after handshaking; this handshake is a significant source of latency for such flows. In this paper we desc
Winnyã®é‡‘åæ°ãŒå¤¢è¦‹ã‚‹æ¬¡ä¸–代高速ãƒãƒƒãƒˆã®ä¸–ç•Œ (1/5)
2011å¹´ã€8å¹´ã‚’ã‹ã‘ãŸã€ŒWinnyã€è£åˆ¤ãŒçµ‚ã‚ã£ãŸã€‚渦ä¸ã«ã„ãŸã®ã¯ã€Œ2ã¡ã‚ƒã‚“ãã‚‹ã€ã§ã¯ã€Œ47æ°ã€ã¨å‘¼ã°ã‚Œã¦ã„ãŸé‡‘å勇æ°ã 。è£åˆ¤å¾Œã®ã‚¤ãƒ³ã‚¿ãƒ“ュー（関連記事）ã§ã¯ã€ç·¨é›†éƒ¨ã®ã€Œã“ã‚Œã‹ã‚‰ã©ã†ã—ã¦ã„ããŸã„ã‹ï¼Ÿã€ã¨ã„ã†è³ªå•ã«ã€Œæ±ºã‚ã¦ãªã„ã§ã™ã€ã¨ç”ãˆã¦ã„ãŸé‡‘åæ°ã§ã‚ã‚‹ãŒã€ç€å®Ÿã«æ¬¡ã®ã‚¹ãƒ†ãƒƒãƒ—ã«é€²ã¿å§‹ã‚ã¦ã„る。 6月12æ—¥ã€Skeed社ã¨ãƒ‡ãƒ¼ã‚¿ãƒ›ãƒ†ãƒ«ãŒæ¥å‹™ææºã—ã¦ã€ŒCLOUD CONNECTã€ã¨ã„ã†ãƒ‡ãƒ¼ã‚¿ã‚»ãƒ³ã‚¿ãƒ¼é–“を高速接続ã™ã‚‹ã‚µãƒ¼ãƒ“スを展開ã™ã‚‹ã¨ç™ºè¡¨ï¼ˆé–¢é€£è¨˜äº‹ï¼‰ã—ãŸãŒã€é‡‘åæ°ã¯ç¾åœ¨ã€ã“ã®Skeed社ã®ç¤¾å¤–å–ç· å½¹ã¨ãªã£ã¦ãŠã‚Šã€æ–°ãŸãªãƒ—ãƒãƒ€ã‚¯ãƒˆã®é–‹ç™ºã«å°‚念ã—ã¦ã„る。今回ã®ã‚¤ãƒ³ã‚¿ãƒ“ューã§ã¯ã€ã“ã®é‡‘åæ°ã¨ã¨ã‚‚ã«ä»£è¡¨å–ç· å½¹ç¤¾é•·ã§ã‚る明石昌也æ°ã‚‚åŒå¸ã‚’願ã„ã€Winny事件をãã£ã‹ã‘ã«ã§ãã‚ãŒã£ãŸã¨ã„ã†Skeed社やã€äº‹ä»¶ã®æ€ã„出ã€ãã—ã¦å½¼ã‚‰ãŒç¾åœ¨åºƒã‚よã†ã¨ã—ã¦ã„る高速データ転é€æŠ€è¡“ã«ã¤ã„ã¦å°‹ãã¦ã¿ãŸã„。 Winny
https://support.microsoft.com/en-us/help/969710
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Let's make TCP faster
By Yuchung Cheng, Make The Web Faster Team Transmission Control Protocol (TCP), the workhorse of the Internet, is designed to deliver all the Web’s content and operate over a huge range of network types. To deliver content effectively, Web browsers typically open several dozen parallel TCP connections ahead of making actual requests. This strategy overcomes inherent TCP limitations but results in
Download BizTalk Server 2006 R2 Retired Technical documentation from Official Microsoft Download Center
No application is an island. Whether we like it or not, tying systems together has become the norm. Yet connecting software is about more than just exchanging bytes. As organizations move toward a service-oriented world, the real goal—creating effective business processes that unite separate systems into a coherent whole—comes within reach. Microsoft BizTalk Server 2006 supports this goal. Like it
wiresharkã§TCP制御フラグを指定ã—ã¦ãƒ‘ケットを表示ã™ã‚‹æ–¹æ³•ï¼ˆDisplay Filter） - Eiji James Yoshidaã®è¨˜éŒ²
個人的ã«ã¯ã‚ã¾ã‚Šä½¿ã‚ãªã„wiresharkã®Display Filterã ãŒã€çŸ¥ã£ã¦ã‚‹ã¨ä¾¿åˆ©ãªå ´åˆã‚‚ã‚ã‚‹ã®ã§ãƒ¡ãƒ¢ã€‚ SYNフラグãŒè¨å®šã•ã‚ŒãŸãƒ‘ケットã®è¡¨ç¤º tcp.flags.syn==1 SYNフラグãŒè¨å®šã•ã‚Œã¦ã„ãªã„パケットã®è¡¨ç¤º tcp.flags.syn==0 SYNフラグã®ã¿è¨å®šã•ã‚ŒãŸãƒ‘ケットã®è¡¨ç¤º tcp.flags==2 ACKフラグãŒè¨å®šã•ã‚ŒãŸãƒ‘ケットã®è¡¨ç¤º tcp.flags.ack==1 ACKフラグãŒè¨å®šã•ã‚Œã¦ã„ãªã„パケットã®è¡¨ç¤º tcp.flags.ack==0 ACKフラグã®ã¿è¨å®šã•ã‚ŒãŸãƒ‘ケットã®è¡¨ç¤º tcp.flags==16 ACKフラグã¨SYNフラグãŒè¨å®šã•ã‚ŒãŸãƒ‘ケットã®è¡¨ç¤º tcp.flags.syn==1 && tcp.flags.ack==1 ACKフラグã¨SYNフラグã®ã¿è¨å®šã•ã‚ŒãŸãƒ‘ケットã®è¡¨ç¤º tcp.flags==18 ACKフラグã‹SYNフラグ
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