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sho id:sho

ntpã«é–¢ã™ã‚‹shoã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (6)

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NTPåˆ©ç”¨ã®ç†ç”±ã¨ã‚¢ãƒƒãƒ—ãƒ‡ãƒ¼ãƒˆã®æŽ¨å¥¨ (#3335688) | TP-Linkã®ç„¡ç·šLANãƒ«ãƒ¼ã‚¿ãƒ¼ãªã©ã§é«˜é »åº¦ã§NTPã‚µãƒ¼ãƒãƒ¼ã«ãƒªã‚¯ã‚¨ã‚¹ãƒˆã‚’æŠ•ã’ã‚‹è¨å®šãŒç™ºè¦šã—å•é¡Œã« | ã‚¹ãƒ©ãƒ‰
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sho 2018/01/01
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internet

china

tp-link

ntp
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Public NTP Â |Â Google for Developers
Stay organized with collections Save and categorize content based on your preferences. The Network Time Protocol (NTP) is used by hundreds of millions of computers and devices to synchronize their clocks over the Internet. If your computer sets its own clock, it likely uses NTP.
sho 2016/12/01
DNSã«ç¶šã„ã¦NTPã¾ã§Googleã‹ãƒ¼ã€ã‹ãƒ¼

ntp

google
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Linuxã®ã†ã‚‹ã†ç§’ãŠã•ã‚‰ã„ - ã‚ã‚‚ãŠãã°
7/1 åˆå‰9æ™‚(JST)ã«ã†ã‚‹ã†ç§’ãŒæŒ¿å…¥ã•ã‚Œã¾ã™ãŒã€æ³¨æ„ã™ã¹ããƒã‚¤ãƒ³ãƒˆã®ãŠã•ã‚‰ã„ã§ã™ã€‚ ã†ã‚‹ã†ç§’ã£ã¦ä½•ã‚ˆ NICTã®è³‡æ–™ã®å…ˆé 7ãƒšãƒ¼ã‚¸ç›®ã¾ã§èªã‚“ã§ãã ã•ã„ã€‚ ã–ã£ãã‚Šè¨€ã†ã¨ã€ç¾åœ¨ã®æ™‚è¨ˆã¨ã„ã†ã®ã¯ã€ŒåŽŸåæ™‚è¨ˆã€ãŒåŸºæº–ã«ãªã£ã¦ã„ã¾ã™ã€‚å¤ªé™½ã®å‘¨ã‚Šã‚’å›žã‚‹å…¬è»¢å‘¨æœŸã«åˆã‚ã›ã¦å¾®èª¿æ•´ã™ã‚‹ã®ãŒã†ã‚‹ã†å¹´ã§ã€åœ°çƒè‡ªä½“ãŒå›žè»¢ã™ã‚‹è‡ªè»¢æ™‚é–“ã«åˆã‚ã›ã¦å¾®èª¿æ•´ã™ã‚‹ã®ãŒã†ã‚‹ã†ç§’ã§ã™ã€‚ ç¾è±¡ã¨ã—ã¦ã¯ã€ã€Œæœˆæœ«ã€ã®æ—¥ä»˜ãŒå¤‰ã‚ã‚‹ç›´å‰ã«1ç§’è¿½åŠ ã•ã‚Œã¾ã™ã€‚ãŸã ã—ã€ã“ã‚Œã¯UTC(å”å®šä¸–ç•Œæ™‚)ã§ã®è©±ãªã®ã§ã€æ—¥æœ¬æ¨™æº–æ™‚ã§ã¯9æ™‚é–“ã®æ™‚å·®ãŒã‚ã‚‹ã®ã§æœ9æ™‚(ã®ç›´å‰)ã«ãªã‚‹ã‚ã‘ã§ã™ã€‚ æ™‚é–“ã®é€²ã¿ã‚’è¡¨ã«ã™ã‚‹ã¨ã“ã‚“ãªæ„Ÿã˜ã§ã™ã€‚ UTC(å”å®šä¸–ç•Œæ™‚) JST(æ—¥æœ¬æ¨™æº–æ™‚) ã†ã‚‹ã†ç§’ã‚’çŸ¥ã‚‰ãªã„æ™‚è¨ˆ 2015å¹´ 6æœˆ30æ—¥ 23æ™‚59åˆ†57ç§’ 2015å¹´ 7æœˆ 1æ—¥ 8æ™‚59åˆ†57ç§’ 2015å¹´ 7æœˆ 1æ—¥ 8æ™‚59åˆ†57ç§’ 2015å¹´ 6æœˆ30æ—¥ 23æ™‚
sho 2015/06/30
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ntp
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2016/12/27 æ›´æ–° Googleãªã©ã®å¤§æ‰‹ITä¼æ¥ãŒã†ã‚‹ã†ç§’å¯¾ç–æ¸ˆã®NTPã‚µãƒ¼ãƒãŒå…¬é–‹ã—ãŸãŸã‚ã€ã“ã‚Œã‚’åˆ©ç”¨ã™ã‚‹å†…å®¹ãªã©ã‚’ä»¥ä¸‹ã«ã¾ã¨ã‚ã¾ã—ãŸã€‚ å…ƒæ—¦ã«å®Ÿæ–½ã•ã‚Œã‚‹ ã†ã‚‹ã†ç§’ã®å¯¾ç– ã¾ã¨ã‚ 2016/07/08 æ›´æ–° 2017/1/1ã«é–ç§’ã®å®Ÿæ–½ãŒæ±ºå®šã•ã‚Œã¾ã—ãŸã€‚å¯¾å¿œã¯ã“ã®è¨˜äº‹ã®ã¨ãŠã‚Šã§å•é¡Œãªã•ãã†ã§ã™ã€‚ 2015/06/24 æƒ…å ±è¿½åŠ (2015/06/29 æ›´æ–°) ä¸‹è¨˜ã®å¯¾å¿œã«é–¢ã‚ã‚‹ntpdã®æ¯”è¼ƒçš„æ–°ã—ã„ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã«SLEWãƒ¢ãƒ¼ãƒ‰ã§å‹•ä½œã—ã¦ã„ã¦ã‚‚ã€ã†ã‚‹ã†ç§’ãŒæŒ¿å…¥ã•ã‚Œã‚‹ãƒã‚°ãŒç™ºè¦‹ã•ã‚Œã¾ã—ãŸã€‚[redhat] ã“ã‚Œã«ã‚ˆã‚Šntp-4.2.8p3-RC1ä»¥é™ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã§ãªã„ã¨SLEWãƒ¢ãƒ¼ãƒ‰ã§å‹•ä½œã—ã¦ã„ã¦ã‚‚ã†ã‚‹ã†ç§’ãŒæŒ¿å…¥ã•ã‚Œã¾ã™ã€‚RedHatã¯ntp-4.2.6p5-3.el6_6ã¨ã„ã†å¯¾å¿œæ¸ˆã¿ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚’æä¾›ã—ã¦ã„ã¾ã™ã€‚Ubuntuã§ã¯ä»Šæ—¥ç¾åœ¨12.04LTS, 14.04LTSã®ï¼’ãƒãƒ¼ã‚¸
sho 2015/01/09
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ntp

linux
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NTPãƒ™ãƒ¼ã‚¹ã®DDoSæ”»æ’ƒã‚’ç†è§£ã™ã‚‹ - ãƒ¯ã‚¶ãƒŽãƒ | wazanova
http://blog.cloudflare.com/understanding-and-mitigating-ntp-based-ddos-attacks1 comment | 0 pointså¹´åˆã«League of Legendsã€EA.comã®ã‚µãƒ¼ãƒãŒãƒ€ã‚¦ãƒ³ã™ã‚‹åŽŸå› ã¨ãªã£ãŸNTPãƒ™ãƒ¼ã‚¹ã®DDoSæ”»æ’ƒã«ã¤ã„ã¦ã€CoudFalreãŒã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãƒ–ãƒã‚°ã§ã¾ã¨ã‚ã¦ã„ã¾ã™ã€‚ DNS Reflection is so 2013 DNSãƒ™ãƒ¼ã‚¹ã®DDoSæ”»æ’ƒã¨NTPãƒ™ãƒ¼ã‚¹ã®æ”»æ’ƒã¯ä¼¼ã¦ã„ã‚‹ã€‚ãƒ—ãƒãƒˆã‚³ãƒ«ã®é•ã„ã ã‘ã€‚æ”»æ’ƒè€…ãŒã€è¢«å®³è€…ã¨ãªã‚‹ç›¸æ‰‹ã®IPã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’å½ã£ã¦ãƒ‘ã‚±ãƒƒãƒˆã‚’é€ä»˜ã€‚äº‹æƒ…ã‚’çŸ¥ã‚‰ãªã„ã‚µãƒ¼ãƒã¯ã€ãƒªã‚¯ã‚¨ã‚¹ãƒˆã«å¿œãˆã¦ã€è¢«å®³è€…ã®IPã‚¢ãƒ‰ãƒ¬ã‚¹ã«ãƒ‡ãƒ¼ã‚¿ã‚’è¿”ã™ã¨ã„ã†ä»•çµ„ã¿ã€‚å®Ÿéš›ã®æ”»æ’ƒè€…ã®ã‚½ãƒ¼ã‚¹ã¯éš ã•ã‚Œã¦ã„ã¦ã€ãƒˆãƒ¬ãƒ¼ã‚¹ã™ã‚‹ã®ãŒé›£ã—ã„ã€‚ã‚‚ã—å¤§é‡ã®ã‚µãƒ¼ãƒãŒåˆ©ç”¨ã•ã‚Œã‚‹ã¨ã€ç›¸å½“ã®ãƒœãƒªãƒ¥ãƒ¼ãƒ ã®ãƒ‘ã‚±ãƒƒãƒˆãŒã€ä¸–ç•Œä¸ã‹ã‚‰è¢«å®³è€…
sho 2014/01/17
security

ntp

dos
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EPIC2014 Google Public DNS (8.8.8.8, 8.8.4.4) çµŒç”±ã§ã¯æœ¬ã‚µã‚¤ãƒˆã«ã‚¢ã‚¯ã‚»ã‚¹ã§ããªã„ã‚ˆã†æŽªç½®ã•ã›ã¦é ‚ã„ã¦ãŠã‚Šã¾ã™ã€‚ ã‚ã‚‹è€èˆ—ã®åœ°åŸŸãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯é‹å–¶å›£ä½“ã®ãƒ‰ãƒ¡ã‚¤ãƒ³å(æŸ.or.jp)ãŒ VISA.CO.JP åŒæ§˜ã«ãƒã‚¤ã‚¸ãƒ£ãƒƒã‚¯å¯èƒ½ãªçŠ¶æ…‹ã«ãªã£ã¦ã„ã‚‹ã“ã¨ã«æ°—ã¥ãã€6æœˆ16æ—¥(åœŸ)13:43 ã«ã‚ã‚‹æ”¾æ£„ã•ã‚ŒãŸãƒ‰ãƒ¡ã‚¤ãƒ³å(æŸ.net)ã‚’å–å¾—(ç™»éŒ²ã¨ã„ã†ã®ãŒæ£ã—ã„)ã—ã¾ã—ãŸã€‚é–¢ä¿‚è€…(æŸæœ‰åäºº)ã«ã¯ã™ãã«é€£çµ¡ã—ã¾ã—ãŸã®ã§ã€è¿‘ã„ã†ã¡ã«å¯¾å‡¦ã•ã‚Œã‚‹ã‚‚ã®ã¨æ€ã„ã¾ã™ã€‚ ãã‚Œã¯ã„ã„ã¨ã—ã¦(ã‚ˆããªã„ã§ã™ãŒ)ã€DNSã‚’ç«‹ã¡ä¸Šã’ã¦ãƒã‚°ã‚’è¦‹ã¦ã¿ã‚‹ã¨ã€ã™ã”ã„å‹¢ã„ã§ query ãŒé£›ã‚“ã§ãã¾ã™ã€‚ãã®åå‰ãŒãªã‚“ã¨ ntp.***********.net ã¨ãªã£ã¦ã„ã¾ã™ã€‚ã‚µãƒ¼ãƒã‚¨ãƒ³ã‚¸ãƒ³ã§èª¿ã¹ã¦ã¿ã‚‹ã¨ã€æ˜”ã€å‰²ã¨åºƒãä½¿ã‚ã‚Œã„ãŸ NTP ã‚µãƒ¼ãƒã®ã‚ˆã†ã§ã™ã€‚ã¡ã‚‡ã£ã¨èºŠèº‡ã—ã¾ã—ãŸãŒã€æ—¥æ›œã«ãªã£ã¦ã€
sho 2012/06/18
security

ntp

dns
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