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ihag id:ihag

DNSã«é–¢ã™ã‚‹ihagã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (8)

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DNS Study
DNS ã‚’å¦ã³ã¾ã—ã‚‡ã† DNS ã®å¦ã³æ–¹ (SECCON 2014 é•·é‡Žå¤§ä¼š) DNS æ¸©æ³‰ 2 DNS æ¸©æ³‰ 2 è£œè¬› (DNS æ¯’å…¥ã‚Œã®çœŸå®Ÿ) DNS æ¸©æ³‰ 3 DNS æ¸©æ³‰ ç•ªå¤–ç·¨ DNS æ¸©æ³‰ 4 DNS æ¸©æ³‰ 5 DNSSEC ã®ä»•çµ„ã¿ (å¦ã¶ä¾¡å€¤ã¯ã‚ã‚Šã¾ã›ã‚“) DNSSEC ã¯ãªãœãƒ€ãƒ¡ãªã®ã‹ BIND ã‚’æ¨ã¦ã‚ˆã† (OSC 2009 åå¤å±‹) DNS å†å…¥é–€ (OSC 2017 åå¤å±‹) ä¸»è¦ RFC (æœ€ä½Žé™) RFC1034 DOMAIN NAMES - CONCEPTS AND FACILITIES RFC1035 DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION RFC2181 Clarifications to the DNS Specification RFC2308 Negative Caching of DNS Qu
ihag 2019/02/17
DNS
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DNS æ¸©æ³‰ 4 æ•™æ
DNS æ¸©æ³‰4 (2017)
ihag 2019/02/17
DNS
ãƒªãƒ³ã‚¯
squish.net DNS comprehensive traversal checker
Comprehensive traversal DNS checking in an instant Check your internet addresses with squish.net's traversing DNS checker. This will check every single branch of the DNS tree to ensure your addresses are delegating and resolving correctly. This is accomplished by traversing the DNS tree from the root examining all possible routes that a client could travel, calculating percentage probabilities on
ihag 2018/01/29
DNS
ãƒªãƒ³ã‚¯
BINDã‹ã‚‰ã®å’æ¥
1 æ ªå¼ä¼šç¤¾ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã‚¤ãƒ‹ã‚·ã‚¢ãƒ†ã‚£ãƒ– å³¶æ‘ å…… <simamura@iij.ad.jp> BINDã‹ã‚‰ã®å’æ¥ 2 BINDã‹ã‚‰ã®å’æ¥? â€¢ BINDã®å•é¡Œç‚¹ â€“ DoSè„†å¼±æ€§å¤šã™ãŽãªã‚“ã ã‚ˆãŠãŠãŠãŠãŠãŠãŠãŠ â€“ ã€Œé‡è¤‡ã€ã«æ€¯ãˆã‚‹æ—¥ã€…ã€‚ã€Œå¤ã®BINDç¥ã‚Šã€ 1 2 3 4 5 6 7 8 9 10 11 12 2009 â—Ž 2010 â—Ž â—Ž 2011 â—Ž â—‹ â—Ž â—Ž â—Ž/â—‹ 2012 â—Ž â—‹ â—Ž â—Ž â—‹ 2013 â—‹ â—Ž â—Ž â—Ž 2014 â—Ž â—Ž â—Ž â—‹/â—Ž 2015 â—Ž â—Ž/â—Ž â—Ž â—Ž 2016 â—Ž â—Ž â€» JPRSã•ã‚“ã€ŒDNSé–¢é€£æŠ€è¡“æƒ…å ±ã€ã«ã¦ â€œ(é‡è¦)â€ â†’â—Ž ç„¡å°â†’â—‹ åŒæ—¥å…¬é–‹ã®ã‚‚ã®ã¯1ã¤ã«ã¾ã¨ã‚ã¦ã‚ã‚‹ 3 BINDã®è„†å¼±æ€§ã«ã¤ã„ã¦ â€¢ Security Architecture of BIND 9 â€“ JANOG US Regional Meeting #2ã§ã®ç¥žæ˜Ž ã•ã‚“ã®ç™ºè¡¨
ihag 2016/06/24
DNS
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ã‚ªãƒ¼ãƒ—ãƒ³ãƒªã‚¾ãƒ«ãƒ(Open Resolver)ã«å¯¾ã™ã‚‹æ³¨æ„å–šèµ· - JPNIC
åˆç‰ˆå…¬é–‹ã€€2013å¹´4æœˆ18æ—¥ æœ€çµ‚æ›´æ–°ã€€2014å¹´7æœˆ25æ—¥ DNSã®ä¸ç‰¹å®šã‹ã‚‰ã®å•ã„åˆã‚ã›ã«å¿œç”ã™ã‚‹*1ã€ ã‚µãƒ¼ãƒã‚„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ã¯ã€ã‚ªãƒ¼ãƒ—ãƒ³ãƒªã‚¾ãƒ«ãƒã¨å‘¼ã°ã‚Œã¦ã„ã¾ã™ã€‚ æœ€è¿‘ã€ é©åˆ‡ãªå¯¾ç–ãŒæ–½ã•ã‚Œã¦ã„ãªã„ã‚ªãƒ¼ãƒ—ãƒ³ãƒªã‚¾ãƒ«ãƒãŒè¸ã¿å°*2ã¨ã—ã¦åˆ©ç”¨ã•ã‚Œã€ å›½å†…å¤–ã®ã‚µãƒ¼ãƒã«å¯¾ã™ã‚‹å¤§è¦æ¨¡ãªDDoSæ”»æ’ƒ*3ãŒè¡Œã‚ã‚Œã¦ã„ã‚‹ã“ã¨ãŒå ±å‘Šã•ã‚Œã¦ã„ã¾ã™ã€‚ ã“ã‚Œã‚’å—ã‘ã¦ã€æœ¬æ¥ã€ ã‚ªãƒ¼ãƒ—ãƒ³ãƒªã‚¾ãƒ«ãƒã§ã‚ã‚‹å¿…è¦ã®ãªã„ã‚µãƒ¼ãƒã‚„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ã‚’æ¸›ã‚‰ã—ã€ è¸ã¿å°ã¨ãªã£ã¦ã—ã¾ã†ã“ã¨ã¸ã®å¯¾ç–ã‚’ã¨ã‚‹ãŸã‚ã®æ´»å‹•ãŒè¡Œã‚ã‚Œã¦ã„ã¾ã™ã€‚ ã”ç¢ºèªã¨å¯¾ç–ã‚’ãŠé¡˜ã„ã„ãŸã—ã¾ã™ã€‚ *1 ã“ã“ã§ã¯ãƒ‰ãƒ¡ã‚¤ãƒ³åã®åå‰è§£æ±ºã®ãŸã‚ã«è¡Œã‚ã‚Œã‚‹å•ã„åˆã‚ã›ã‚’æŒ‡ã—ã¦ã„ã¾ã™ã€‚ ã“ã®å•ã„åˆã‚ã›ã‚’å—ã‘ãŸã€ DNSã®ãƒªã‚¾ãƒ«ãƒã¨å‘¼ã°ã‚Œã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã¯ã€ è¤‡æ•°ã®ãƒãƒ¼ãƒ ã‚µãƒ¼ãƒã«å•ã„åˆã‚ã›ã‚’è¡Œã„ã€ ãã®çµæžœã‚’å•ã„åˆã‚ã›å´ã«å¿œç”ã™ã‚‹ä»•çµ„ã¿ã«ãªã£ã¦ã„ã¾ã™ã€‚
ihag 2014/01/14
DNS

UDP

network
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ã™ã¹ã¦ã®åŸºç¤Žã€ãƒžã‚¹ã‚¿ãƒ¼ãƒ»ã‚¾ãƒ¼ãƒ³ã‚µãƒ¼ãƒã®è¨å®š
ã™ã¹ã¦ã®åŸºç¤Žã€ãƒžã‚¹ã‚¿ãƒ¼ãƒ»ã‚¾ãƒ¼ãƒ³ã‚µãƒ¼ãƒã®è¨å®šï¼šå®Ÿç”¨ BIND 9ã§ä½œã‚‹DNSã‚µãƒ¼ãƒï¼ˆ2ï¼‰ï¼ˆ2/3 ãƒšãƒ¼ã‚¸ï¼‰ ã‚¾ãƒ¼ãƒ³ãƒ•ã‚¡ã‚¤ãƒ«ã®ä½œæˆ æ¬¡ã«ã€/var/namedä¸‹ã«/etc/named.confã§è¨˜è¿°ã—ãŸã™ã¹ã¦ã®ã‚¾ãƒ¼ãƒ³ãƒ•ã‚¡ã‚¤ãƒ«ã‚’ä½œæˆã—ã¾ã™ã€‚ named.ca ã‚ãƒ£ãƒƒã‚·ãƒ¥ã‚µãƒ¼ãƒã¨ã—ã¦å‹•ä½œã™ã‚‹ãŸã‚ã«ã¯ã€ãƒ«ãƒ¼ãƒˆã‚µãƒ¼ãƒãŒã©ã“ã«ã‚ã‚‹ã®ã‹ã‚’æ£ã—ãçŸ¥ã£ã¦ãŠãå¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ãã®ãŸã‚ã®ã‚¾ãƒ¼ãƒ³ãƒ•ã‚¡ã‚¤ãƒ«ã‚’ftp://ftp.rs.internic.net/domain/named.rootã‹ã‚‰å…¥æ‰‹ã—ã€/var/named/named.caã¨ã—ã¦ä¿å˜ã—ã¾ã™ã€‚ ãƒ«ãƒ¼ãƒˆã‚µãƒ¼ãƒã¯ä¸å¤‰ã§ã‚ã‚‹ã¨æ€ã‚ã‚ŒãŒã¡ã§ã™ãŒã€é »ç¹ã§ãªã„ã«ã—ã‚æ›´æ–°ã•ã‚Œã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚2002å¹´11æœˆã«ã¯DoSæ”»æ’ƒã¸ã®å¯¾ç–ã‹ã‚‰ã€5å¹´ã¶ã‚Šã«ãƒ«ãƒ¼ãƒˆã‚µãƒ¼ãƒã«å¤‰æ›´ãŒåŠ ãˆã‚‰ã‚Œã¾ã—ãŸã€‚BINDã¯namedèµ·å‹•æ™‚ã«ãƒ«ãƒ¼ãƒˆã‚µãƒ¼ãƒã«æŽ¥ç¶šã—ã€è‡ªå‹•çš„ã«æœ€æ–°ã®ãƒ«ãƒ¼ãƒˆã‚µãƒ¼ãƒä¸€è¦§æƒ…å ±ã«
ihag 2010/10/04
DNS
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http://jprs.jp/tech/material/IW2002-DNS-DAY-morishita.pdf
ihag 2010/10/04
DNS
ãƒªãƒ³ã‚¯
c-ares: a modern asynchronous DNS resolver
Download Features Supported RFCs and Proposals Communication Source code Who is c-ares? c-ares is a modern DNS (stub) resolver library, written in C. It provides interfaces for asynchronous queries while trying to abstract the intricacies of the underlying DNS protocol. It was originally intended for applications which need to perform DNS queries without blocking, or need to perform multiple DNS q
ihag 2010/07/14
dns

resolver
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1