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networkã«é–¢ã™ã‚‹hirafooã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (13)

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tcp_tw_ãªã‚“ã¨ã‹ã®é•ã„ - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? è‡ªåˆ†ç”¨ã®è¦šæ›¸ã§ã™ã€‚CentOS5ã¨ã‹6ã¨ã‹ã§ã®çµŒé¨“ã€‚ å®Ÿéš›é«˜è² è·ã ã¨ã‹è² è·è©¦é¨“ãƒ„ãƒ¼ãƒ«ã§å‡ºãŸã ã¨ã‹ã®TIME_WAITã‚’æ¸›ã‚‰ã—ãŸã„ã¨ã„ã†ã¨ãã«ã€ syctlã§ã€tcp_ãªã‚“ã¨ã‹ã‚’èª¿æ•´ã™ã‚‹ã¨ã„ã†ã®ã¯ä»Šã§ã¯ã‚ˆãã‚ã‚‹ã¨æ€ã„ã¾ã™ã€‚ ï¼ˆã‚ãŸã—ã¯ã‚€ã‹ã—é‹ç”¨ã—ã¦ã„ãŸæŸç„¡æ–™ã‚µã‚¤ãƒˆã§è² è·ã«æ‚©ã‚“ã ã®ãŒåˆ‡æ¬ ã§çŸ¥ã‚Šã¾ã—ãŸã€‚ç„¡æ–™ã¨ã„ã†ã ã‘ã§ä¼šå“¡æ•°æ¿€å¢—çš„ãªé¢¨æ½®ã ã£ãŸã®ã¨ç´ è¡Œã®æ‚ªã„æŸå›½ã®ã‚¯ãƒãƒ¼ãƒ©ãƒ¼ã¨ã‹rewriteã®ãƒ«ãƒ¼ãƒ—ã¨ã‹ã®è‰²ã€…ãªèŠ¸ã®è‚¥ã‚„ã—çš„ãªæ©Ÿä¼šãŒã¨ã„ã†ã‹å¤œä¸ã«èµ·ã“ã•ã‚Œã¦çœ ã‚Šã‚’å¦¨ã’ã‚‰ã‚ŒãŸããªã‹ã£ãŸã®ã§è‰²ã€…èª¿ã¹ãŸã‚Šã—ã¦ã„ã¾ã—ãŸã€‚ï¼‰ ã„ã£ã±ã„æŽ¥ç¶šã—ãŸã„ã® - (ã²)
hirafoo 2016/06/24
tcp

network
ãƒªãƒ³ã‚¯
Routing Information Protocol - Wikipedia
Routing Information Protocol (ãƒ«ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ãƒ»ã‚¤ãƒ³ãƒ•ã‚©ãƒ¡ãƒ¼ã‚·ãƒ§ãƒ³ãƒ»ãƒ—ãƒãƒˆã‚³ãƒ«ã€ç•¥ç§°ï¼šRIP) ã¨ã¯UDP/IPä¸Šã§å‹•ä½œã™ã‚‹ãƒ«ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ãƒ—ãƒãƒˆã‚³ãƒ«ã§ã‚ã‚‹ã€‚ è‡ªå¾‹ã‚·ã‚¹ãƒ†ãƒ (AS) å†…ã®ãƒ«ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚’è¡Œã†Interior Gateway Protocolï¼ˆIGPï¼‰ã®é€šä¿¡ãƒ—ãƒãƒˆã‚³ãƒ«ã§ã‚ã‚‹ã€‚ ã¾ãŸã€è·é›¢ãƒ™ã‚¯ãƒˆãƒ«åž‹ï¼ˆDVAï¼‰ã®ãƒ«ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚’è¡Œã†è·é›¢ãƒ™ã‚¯ãƒˆãƒ«åž‹ãƒ«ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ãƒ—ãƒãƒˆã‚³ãƒ«ï¼ˆãƒ‡ã‚£ã‚¹ã‚¿ãƒ³ã‚¹ãƒ™ã‚¯ã‚¿ãƒ«ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ï¼‰ã§ã‚ã‚‹ã€‚ RIPã¯ã€çµŒç”±ã™ã‚‹å¯èƒ½æ€§ã®ã‚ã‚‹ãƒ«ãƒ¼ã‚¿ã‚’ãƒ›ãƒƒãƒ—æ•°ã¨ã„ã†å€¤ã§æ•°å€¤åŒ–ã—ã€DVAï¼ˆè‹±èªžç‰ˆï¼‰ (Distance Vector Algorithm)ã¨ã„ã†ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ ã§éš£æŽ¥ãƒ›ã‚¹ãƒˆã¨ã®çµŒè·¯ã‚’å‹•çš„ã«äº¤æ›ã™ã‚‹äº‹ã§ã€ãƒ‘ã‚±ãƒƒãƒˆãŒç›®çš„ã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¢ãƒ‰ãƒ¬ã‚¹ã«ãŸã©ã‚Šç€ãã¾ã§ã®æœ€çŸçµŒè·¯ã‚’æ±ºå®šã™ã‚‹ã€‚ ã¾ãŸã€æœ‰åŠ¹çµŒè·¯ã‚’2ã¤ã¾ã§æŽ¡ç”¨ã—ã€å›ºå®šãƒ¡ãƒˆãƒªãƒƒã‚¯å€¤ã‚’ä¸Žãˆã‚‹ã“ã¨ã§ã€åŒä¸€ãƒ›ãƒƒãƒ—æ•°ã®çµŒè·¯
hirafoo 2011/12/15
rip

network
ãƒªãƒ³ã‚¯
TCP/IP ã§ TIME_WAIT ãŒæ®‹ã‚‹æ™‚é–“ã‚’çŸãã™ã‚‹
TIME_WAIT çŠ¶æ…‹ã® TCP ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒå¤šæ•°æ®‹ã‚‹ netstat ã‚³ãƒžãƒ³ãƒ‰ã§ TCP ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã®çŠ¶æ…‹ã‚’ç¢ºèªã—ã¦ã„ã‚‹ã¨ã€"TIME_WAIT" ã¨ã„ã†çŠ¶æ…‹ã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒãŸãã•ã‚“ç¢ºèªã•ã‚Œã‚‹å ´åˆãŒã‚ã‚Šã¾ã™ã€‚ "TIME_WAIT" çŠ¶æ…‹ã¨ã„ã†ã®ã¯ TCP ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã«ãŠã„ã¦ã€ã“ã¡ã‚‰å´ã‹ã‚‰é€šä¿¡ã‚’ã—ãŸå ´åˆã« "FIN_WAIT_1" (FIN ACK å—ä¿¡) ã‹ã‚‰ã€"FIN_WAIT_2" (ACK å—ä¿¡) ã¾ãŸã¯ "CLOSING" (FIN å—ä¿¡, ACK é€ä¿¡)ã‚’çµŒã¦ã€ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’é–‰ã˜ã‚‰ã‚Œã‚‹çŠ¶æ…‹ã¨ãªã£ãŸã“ã¨ã‚’ç¤ºã™ã‚‚ã®ã®ã‚ˆã†ã§ã™ã€‚ ãã—ã¦ã“ã® "TIME_WAIT" ã‹ã‚‰ã€å®Ÿéš›ã«ãã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒé–‰ã˜ã‚‰ã‚Œã¦ "CLOSED" ã¨ãªã‚‹ã¾ã§ã®é–“ã«å¾…ã¡æ™‚é–“ãŒã‚ã‚Šã€ã“ã‚Œã«ã‚ˆã£ã¦ã€çŸæ™‚é–“ã«é€šä¿¡ãŒé›†ä¸ã™ã‚‹ã¨ã€ãã®åˆ†ã ã‘é€šä¿¡çµ‚äº†é–“éš›ã® "TIME_WAIT" çŠ¶æ…‹ã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ãŒå¤šæ•°ã€ne
hirafoo 2011/10/25
linux

network

time_wait
ãƒªãƒ³ã‚¯
ã©ã•ã«ã£ã
2008å¹´4æœˆ21æ—¥(æœˆ) â– ç„¡é¡Œ _ ä»Šæœã®é›»è»Šã§ãŠã£ã•ã‚“ãŒèªã‚“ã§ãŸã‚¹ãƒãƒ¼ãƒ„æ–°èžã‹ã‚‰ã¡ã‚‡ã£ã¨è¦‹ãˆã¦ãŸè¦‹å‡ºã—ã€‚é ã®ãŠã‹ã—ã„äººãŒæ–°å¹¹ç·šã§å…¨è£¸ã«ãªã£ã¦ã‚¿ã‚¤ãƒ¼ãƒ›ã€‚æ˜¥ã ãªãã€‚ _ å‡ºç¤¾ã—ã¦ã‹ã‚‰ãƒ‹ãƒ¥ãƒ¼ã‚¹ã‚µã‚¤ãƒˆã‚’å·¡å›žã—ã¦ã€ãã‚ŒãŒ ãƒ•ã‚¡ãƒ¼ã‚¹ãƒˆã‚µãƒ¼ãƒã®ç¤¾é•·ã ã£ãŸã¨çŸ¥ã‚‹ã€‚ã‚ãã€‚ _ ã¡ã€ã¡ãŒã†ã‚ˆã£ã€æ˜¥ã ã‹ã‚‰é ã®ãŠã‹ã—ã„äººãŒæ¹§ã„ã¦ããŸã‚“ã˜ã‚ƒãªã„ã‚ˆã£ã€‚ã ã£ã¦ãƒ¬ãƒ³ã‚¿ãƒ«ã‚µãƒ¼ãƒä¼šç¤¾ã®ç¤¾é•·ã ã‚ˆï¼Ÿ é ãŒãŠã‹ã—ã„ãªã‚“ã¦ã“ã¨ã¯ãªã„ã‚ˆã€‚æœ€è¿‘ã®ãƒ‡ãƒ¼ã‚¿ã‚»ãƒ³ã‚¿ãƒ¼ã¯é›»åŠ›å•é¡Œã¨ã‹ç†±å•é¡Œã¨ã‹ã„ã‚ã„ã‚å¤§å¤‰ã ã‹ã‚‰ãã€ãã£ã¨é™½æ°—ãŒã‚ˆããªã£ã¦ã‚ã£ãŸã‹ããªã£ãŸã‹ã‚‰ç†±æš´èµ°ã‚’èµ·ã“ã—ã¦ã€ãã®å†·å´ã®ãŸã‚ã«å¤§äº‹ãªã¨ã“ã‚ã‚’æ”¾ç†±ã—ã¦ãŸã ã‘ãªã‚“ã ã‚ˆã£ã€‚ _ ã¦ã‹ã€ãƒ•ã‚¡ãƒ¼ã‚¹ãƒˆã‚µãƒ¼ãƒã£ã¦ã„ã¤ã®ã¾ã«ã‹ yahoo ã®ç³»åˆ—ã«ãªã£ã¦ãŸã®ã‹ã€‚æ˜”ã¯ã‚¯ãƒœã‚¿(ã‚‚ã¡ã‚ã‚“è¾²æ¥æ©Ÿæ¢°ã®ã‚¯ãƒœã‚¿ã®ã“ã¨ã )ã®åä¼šç¤¾ã ã£ãŸã‚ˆãã€ãŸã—ã‹ã€‚ 2008å¹´4æœˆ28æ—¥(æœˆ) â– ç„¡é¡Œ _ ãƒ¡ãƒ¼ãƒ«å±‹ã‚’å»ƒæ¥ã—
hirafoo 2010/07/12
linux

network
ãƒªãƒ³ã‚¯
3 Minutes Networking
ã‚¤ãƒ³ã‚¿ãƒ¼åšå£«(é€šç§°ï¼šåšå£«ï¼‰ æŸæ‰€ã®æŸå¤§å¦ã«ã¦ã€æƒ…å ±å‡¦ç†æŠ€è¡“ã‚’æ•™ãˆã‚‹åšå£«ã€‚å°‚é–€ã¯ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã€‚ ãŸã£ãŸä¸€äººã—ã‹ã„ãªã„ã‚¼ãƒŸç”Ÿã§ã‚ã‚‹ãƒãƒƒãƒˆå›ã‚’ã“ãã¤ã‹ã†ã€‚ ã‚ã‹ã‚Šã‚„ã™ã„æŽˆæ¥ã‚’è¡Œã†ãŒã€æ¯’èˆŒå®¶ã§ã€é»’æ¿ã«å¤§é‡ã«æ›¸ãæŽˆæ¥ã‚’ã™ã‚‹ãŸã‚ã€è©•åˆ¤ãŒæ‚ªã„ã€‚ ãƒãƒƒãƒˆåŠ©æ‰‹(é€šç§°ï¼šãƒãƒƒãƒˆå›ï¼‰ ã‚¤ãƒ³ã‚¿ãƒ¼åšå£«ã®ãŸã ï¼‘äººã®ã‚¼ãƒŸç”Ÿã€‚ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã«ã¤ã„ã¦ã¯å…¨ãã®ç´ äººã€‚ ã‚¤ãƒ³ã‚¿ãƒ¼åšå£«ã®ã‚¼ãƒŸã«å…¥ã£ãŸã®ã¯ã€è©•åˆ¤ã®æ‚ªã„åšå£«ã‹ã‚‰çŸ¥è˜ã‚’å¥ªã„å–ã‚Šã€ã„ãšã‚Œå–ã£ã¦ä»£ã‚ã‚ã†ã¨ã„ã†ç–ç•¥ã‹ã‚‰ã€‚ ãªã‚“ã¦ã„ã†ã‹ã€ã„ã˜ã‚ã‚‰ã‚Œã£åã€‚
hirafoo 2010/07/05
network
ãƒªãƒ³ã‚¯
Host-IPå¤‰æ›
ä½¿ã„æ–¹ 1).ãƒ†ã‚ã‚¹ãƒˆå…¥åŠ›æ¬„ã«èª¿æŸ»ã—ãŸã„ãƒªãƒ¢ãƒ¼ãƒˆãƒ›ã‚¹ãƒˆã®IPã‚¢ãƒ‰ãƒ¬ã‚¹ã¾ãŸã¯ãƒ‰ãƒ¡ã‚¤ãƒ³åã‚’å…¥åŠ›ã—ã¾ã™ã€‚ ï¼©ï¼°ã‚¢ãƒ‰ãƒ¬ã‚¹ã®å…¥åŠ›ä¾‹ï¼š123.456.789.12 ('.'ã§åŒºåˆ‡ã£ãŸï¼“æ¡ä»¥å†…ã®æ•°å€¤ã‚»ãƒƒãƒˆï¼”å€‹/ç©ºç™½ã‚„å„æ•°å€¤ã‚»ãƒƒãƒˆã®å…ˆé ã«0ã‚’ä»˜ã‚‹ã¨ã‚¨ãƒ©ãƒ¼ã«ãªã‚Šã¾ã™ï¼‰ ãƒ›ã‚¹ãƒˆåã®å…¥åŠ›å½¢ä¾‹ï¼šproxy.gw11.abc-net.ne.jp 2).ã€Œå¤‰æ›ãƒœã‚¿ãƒ³ã€ã‚’æŠ¼ã—ã¾ã™ã€‚
hirafoo 2009/03/29
network

webã‚µãƒ¼ãƒ“ã‚¹
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MACã‚¢ãƒ‰ãƒ¬ã‚¹å½è£…
ã“ã“ã§ã¯ã€MACã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’å½è£…ã™ã‚‹ã“ã¨ã«ã‚ˆã‚Šã€MACã‚¢ãƒ‰ãƒ¬ã‚¹ã§æŽ¥ç¶šã®åˆ¶é™ã‚’ã—ã¦ã„ã‚‹ãƒ›ã‚¹ãƒˆã« æŽ¥ç¶šã™ã‚‹æ‰‹æ³•ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ MACã‚¢ãƒ‰ãƒ¬ã‚¹ã¨ã¯ã€NICã«å‰²ã‚ŠæŒ¯ã‚‰ã‚Œã‚‹å›ºæœ‰ã®IDç•ªå·ã§ã‚ã‚Šã€é‡è¤‡ã™ã‚‹äº‹ã¯ç„¡ãã€ ãã®NICã«å‰²ã‚ŠæŒ¯ã‚‰ã‚ŒãŸMACã‚¢ãƒ‰ãƒ¬ã‚¹ã¯ä¸–ç•Œã§1ã¤ã®ç•ªå·ã«ãªã‚Šã¾ã™ã€‚ MACã‚¢ãƒ‰ãƒ¬ã‚¹ã¯ã€ifconfigã‚³ãƒžãƒ³ãƒ‰ãªã©ã‚’æ‰“ã¦ã°ã€ç¢ºèªã™ã‚‹ã“ã¨ãŒå¯èƒ½ã§ã™ã€‚ ä¾‹ãˆã°ã€eth0ã®MACã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’èª¿ã¹ãŸã„å ´åˆã¯ã€ä»¥ä¸‹ã®ã‚ˆã†ã«ã—ã¾ã™ã€‚ # ifconfig eth0 eth0 Link encap:Ethernet HWaddr 00:01:80:00:00:00 inet addr:192.168.1.50 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX pa
hirafoo 2009/03/19
security

network
ãƒªãƒ³ã‚¯
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hirafoo 2008/10/24
network

ip
ãƒªãƒ³ã‚¯
HotSaNIC - HTML overview to System and Network Information Center
always get the latest release from the SourceForge download section ATTENTION UPGRADERS! If you upgrade to the 0.5.x from a 0.4.x or prior release you have to do some manual adaption due to the many changes in the directory layout.
hirafoo 2008/10/23
network

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hotsanic
ãƒªãƒ³ã‚¯
LogMeIn ãƒªãƒ¢ãƒ¼ãƒˆãƒ„ãƒ¼ãƒ«
ADATA M.2 SSDã‚’è²·ã£ã¦ã¿ãŸ HDDãŒå£Šã‚Œãã†ã ã£ãŸã®ã§ä»£æ›¿å“ã‚’ãƒ‰ã‚¹ãƒ‘ãƒ©ã§æŽ¢ã—ã¦ã„ãŸã‚‰ã€ãƒ¡ãƒ¢ãƒªè£½å“ã§æœ‰åãªADATAã®ã€ŒM.2 SSDï¼ˆLEGEND 800ï¼‰2TBã€ãŒæ»…èŒ¶è‹¦èŒ¶å®‰ã‹ã£ãŸ(ç´„1ä¸‡å††)ã®ã§è³¼å…¥ã—ã¦ãƒ‘ã‚½ã‚³ãƒ³ã«å–ã‚Šä»˜ã‘ã—ã¦...
hirafoo 2008/04/09
network
ãƒªãƒ³ã‚¯
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hirafoo 2008/04/05
å›žç·šé€Ÿåº¦

webã‚µãƒ¼ãƒ“ã‚¹

network
ãƒªãƒ³ã‚¯
ã‚µãƒ¼ãƒ“ã‚¹çµ‚äº†ã®ãŠçŸ¥ã‚‰ã›
ã‚µãƒ¼ãƒ“ã‚¹çµ‚äº†ã®ãŠçŸ¥ã‚‰ã› ã„ã¤ã‚‚Yahoo! JAPANã®ã‚µãƒ¼ãƒ“ã‚¹ã‚’ã”åˆ©ç”¨ã„ãŸã ãèª ã«ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚ ãŠå®¢æ§˜ãŒã‚¢ã‚¯ã‚»ã‚¹ã•ã‚ŒãŸã‚µãƒ¼ãƒ“ã‚¹ã¯æœ¬æ—¥ã¾ã§ã«ã‚µãƒ¼ãƒ“ã‚¹ã‚’çµ‚äº†ã„ãŸã—ã¾ã—ãŸã€‚ ä»Šå¾Œã¨ã‚‚Yahoo! JAPANã®ã‚µãƒ¼ãƒ“ã‚¹ã‚’ã”æ„›é¡§ãã ã•ã„ã¾ã™ã‚ˆã†ã€ã‚ˆã‚ã—ããŠé¡˜ã„ã„ãŸã—ã¾ã™ã€‚
hirafoo 2008/04/05
network
ãƒªãƒ³ã‚¯
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Last update 2008.03.20 TCP/IP ã®ãƒãƒ¼ãƒˆç•ªå·ä¸€è¦§ã§ã™ã€‚IANAæä¾›ã®è³‡æ–™ã‚’æŠœç²‹&åŠ å·¥ã—ã¾ã—ãŸã—ã¾ã—ãŸã€‚ TCPã€UDPã®ãƒãƒ¼ãƒˆç•ªå·ã¯å¤§ããï¼“ç¨®é¡žã«åˆ†ã‹ã‚Œã¦ã„ã¾ã™ã€‚ 1.ã‚ˆãçŸ¥ã‚‰ã‚Œã¦ã„ã‚‹ãƒãƒ¼ãƒˆ(WELL KNOWN PORT NUMBERS) 0-199 200-499 500-1023 2.äºˆç´„æ¸ˆã¿ãƒãƒ¼ãƒˆ(REGISTERED PORT NUMBERS) 1024-1499 1500-1699 1700-1999 2000-2499 2500-3299 3300-4999 5000-9999 10000-49151 3.å‹•çš„ï¼ãƒ—ãƒ©ã‚¤ãƒ™ãƒ¼ãƒˆãƒãƒ¼ãƒˆ(DYNAMIC AND/OR PRIVATE PORTS) 49152ã€œ65535 â˜†ã‚µãƒ¼ãƒ“ã‚¹é †ã«ã‚½ãƒ¼ãƒˆã—ã¦ã¿ã¾ã—ãŸ Reserved or Unassigned æ•°å—-B C-C D-E F-
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