[B! DNS] masudaKã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

masudaK id:masudaK

DNSã«é–¢ã™ã‚‹masudaKã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (37)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

Googleã‚„Cloudflareãªã©å„ç¤¾DNSã‚µãƒ¼ãƒ“ã‚¹ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚’æ¯”è¼ƒã—ãŸçµæžœãŒå…¬é–‹ã•ã‚Œã‚‹
ç„¡æ–™ã§æä¾›ã•ã‚Œã¦ã„ã‚‹DNSã‚µãƒ¼ãƒ“ã‚¹ã¯Googleã‚„Cloudflareãªã©è¤‡æ•°ã®ã‚µãƒ¼ãƒ“ã‚¹ãŒã‚ã‚Šã¾ã™ãŒã€ã©ã®ã‚µãƒ¼ãƒ“ã‚¹ã‚’ä½¿ãˆã°ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã‚’ã‚ˆã‚Šå¿«é©ã«ä½¿ãˆã‚‹ã‹ãŒã€ã‚ã‹ã‚Šã¥ã‚‰ããªã£ã¦ã„ã¾ã™ã€‚ãƒãƒƒã‚«ãƒ¼ã®Nyakolas Zæ°ã¯ã€ä¸–ç•Œä¸ã®æœ‰å¿—ã‚’é›†ã‚ã¦ã€ã“ã‚Œã‚‰ã®DNSã‚µãƒ¼ãƒ“ã‚¹ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹æ¯”è¼ƒã‚’è¡Œã„ã€çµæžœã‚’å…¬é–‹ã—ã¾ã—ãŸã€‚ä»Šå›žè¡Œã‚ã‚ŒãŸãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹æ¯”è¼ƒã¯ã€æ—¥æœ¬ã®æ±äº¬ã‚’å«ã‚€ä¸–ç•Œã®18ã®åœ°åŸŸã§ãƒ†ã‚¹ãƒˆãŒè¡Œã‚ã‚Œã¦ãŠã‚Šã€è¨˜äº‹ä½œæˆæ™‚ç‚¹ã«ãŠã„ã¦ã€ã©ã®DNSã‚µãƒ¼ãƒ“ã‚¹ã®å¿œç”æ™‚é–“ãŒå„ªã‚Œã¦ã„ã‚‹ã‹ã‚’ç¤ºã—ã¦ã„ã¾ã™ã€‚ DNS Performance Comparison: Google, Quad9, OpenDNS, Norton, CleanBrowsing, and Yandex https://hackernoon.com/dns-performance-comparison-google-quad9-opendns-
masudaK 2018/04/04
ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯

dns
ãƒªãƒ³ã‚¯
Amazon Route 53ã§Geo DNS(Geo Routing)ã‚’æ§‹æˆã™ã‚‹ | DevelopersIO
ã©ã‚‚ã€å¤§ç€§ã§ã™ã€‚ å…ˆæ—¥ã®Route 53ã®ã‚¢ãƒƒãƒ—ãƒ‡ãƒ¼ãƒˆã§ã§ãã‚‹ã‚ˆã†ã«ãªã£ãŸæ–°æ©Ÿèƒ½ã€Geo DNSã‚’å®Ÿç¾ã™ã‚‹Geo Routingã‚’ã”ç´¹ä»‹ã—ã¾ã™ã€‚ Geo Routing(Geo DNS)ã¨ã¯ Geo DNSã¯ã€åœ°ç†ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã¨æŽ¥ç¶šå…ƒIPã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’ç…§åˆã—ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã«åœ°åŸŸã”ã¨ã®ç•°ãªã‚‹ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’è¿”ã™DNSã®æ§‹æˆã§ã™ã€‚Route 53ã§ã¯ã€Geo DNSç›¸å½“ã®ä»•çµ„ã¿ã¨ã—ã¦ã€Geo Routingæ©Ÿèƒ½ã‚’è¨å®šã™ã‚‹ã“ã¨ãŒå‡ºæ¥ã¾ã™ã€‚ å¾“æ¥ã€Route 53ã«ã¯Latency Routingã¨ã„ã†ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆæœ€å¯„ã‚Šã®ãƒªãƒ¼ã‚¸ãƒ§ãƒ³ã®ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’è¿”ã™æ©Ÿèƒ½ãŒã‚ã‚Šã¾ã—ãŸãŒã€ä»Šå›žã®Geo Routingã¯ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ§‹æˆã«æ‹ ã‚‰ãªã„ã€ç²¾åº¦ã®é«˜ã„ãƒ¬ã‚³ãƒ¼ãƒ‰ã®åŒºåˆ†ã‘ãŒç‰¹å¾´ã§ã™ã€‚ã¾ãŸã€Latency Routingã¯ãƒªãƒ¼ã‚¸ãƒ§ãƒ³å˜ä½ã§ã®æŒ¯ã‚Šåˆ†ã‘ã§ã—ãŸãŒã€Geo Routingã¯å›½ã‚„å·žãªã©ã‚ˆã‚Šç´°ã‹ã„æŒ¯ã‚Šåˆ†ã‘ãŒå¯èƒ½ã§
masudaK 2018/02/06
ã“ã‚“ãªã“ã¨ã§ãã‚‹ã®ã‹

DNS

AWS
ãƒªãƒ³ã‚¯
gdnsdã§ã‹ã‚“ãŸã‚“GSLB(ãã®1) - Qiita
GSLBã‚¢ãƒ—ãƒ©ã‚¤ã‚¢ãƒ³ã‚¹è£½å“ã£ã¦è²·ã†ã¨ã‚ã£ã¡ã‚ƒé«˜ããªã„ã§ã™ã‹ï¼Ÿ ãã‚“ãªã«é«˜ã‹ã£ãŸã‚‰ã€æœˆé¡æ•°ç™¾å††ã‹ã‚‰é‹ç”¨å‡ºæ¥ã¦ã—ã¾ã†Amazon Route 53ã‚„ã•ãã‚‰ã®ã‚¯ãƒ©ã‚¦ãƒ‰GSLB(ç¨ŽæŠœ500å††/æœˆ)ã€GMO ConoHA GeoDNS(ç¨ŽæŠœ500å††/æœˆ)ã‚’ä½¿ã£ã¡ã‚ƒã„ã¾ã™ã‚ˆãï¼ï¼ ã§ã‚‚ã€è‡ªå‰ã§å®‰ä¾¡ã«GSLBã‚’é‹ç”¨ã—ãŸã„ã¨ã„ã†æ–¹ã‚‚ã„ã‚‰ã£ã—ã‚ƒã‚‹ã¨æ€ã„ã¾ã™ã€‚ ãã‚“ãªã‚ãªãŸã«ã€**gdnsd**ã¨ã„ã†ã‚ªãƒ¼ãƒ—ãƒ³ã‚½ãƒ¼ã‚¹ã®GSLBãŒã‚ã‚Šã¾ã™ã‚ˆï¼ ãã‚‚ãã‚‚GSLBã¨ã¯ï¼Ÿ GSLBã¯Global Server Load Balancingã®ç•¥ã§ã€åºƒåŸŸè² è·åˆ†æ•£ã¨æ—¥æœ¬èªžè¨³ã•ã‚Œã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚åœ°ç†çš„ã«é›¢ã‚ŒãŸè¤‡æ•°ã®ã‚µã‚¤ãƒˆã«è² è·ã‚’åˆ†æ•£ã—ãŸã‚Šã€éšœå®³æ™‚ã«ã‚µã‚¤ãƒˆå˜ä½ã®ãƒ•ã‚§ã‚¤ãƒ«ã‚ªãƒ¼ãƒã‚’è¡Œã£ãŸã‚Šã™ã‚‹å ´åˆã«åˆ©ç”¨ã•ã‚Œã¾ã™ã€‚ åœ°ç†çš„ã«é›¢ã‚Œã¦ã„ã‚‹(ï¼ã‚¨ãƒ³ãƒ‰ãƒã‚¤ãƒ³ãƒˆIPã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’ã‚µã‚¤ãƒˆé–“ã§å¼•ãç¶™ã’ãªã„)ã‚ˆã†ãªçŠ¶æ³ã§ä½¿ç”¨ã•ã‚Œã‚‹ãŸã‚ã€DNSã®ä»•çµ„ã¿ã‚’
masudaK 2018/02/01
ã»ãƒ¼

DNS

ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯
ãƒªãƒ³ã‚¯
DNSã«è² è·ã‚’ã‹ã‘ã‚‹ãƒ†ã‚¹ãƒˆ - kinneko@è»¢è·å…ˆå‹Ÿé›†ä¸ã®æ—¥è¨˜
ä½¿ã£ã¦ã„ã‚‹DDNSã‚µãƒ¼ãƒ“ã‚¹ãŒè…ã£ã¦ã„ã‚‹ã®ã§ã€ã—ã‚‡ã†ãŒãªãè©•ä¾¡ã§node/redisã§DDNSã™ã‚‹ç’°å¢ƒã‚’æ›¸ã„ã¦ã¿ã¦ã„ã‚‹ã€‚ APIã¯æ—¢å˜ã‚µãƒ¼ãƒ“ã‚¹äº’æ›ã«ã™ã‚‹å¿…è¦ãŒã‚ã‚‹ã€‚ ãƒ€ãƒ¡ã‚³ãƒ¼ãƒ‰ãªã®ã§ã‚¤ãƒ¤ãªã‚“ã ã‘ã©ã—ã‚‡ã†ãŒãªãåˆã‚ã›ã‚‹ã€‚ ã¨ã‚Šã‚ãˆãšã€DNSéƒ¨åˆ†ã®æ€§èƒ½ãŒã©ã‚“ãªã‚‚ã®ã‹ã€è² è·ã‹ã‘ã¦ã¿ãŸã‚Šã—ãŸã„ã®ã§ã€è©•ä¾¡ãƒ„ãƒ¼ãƒ«ã‚’æŽ¢ã™ã€‚ TCP fallback, eDNS0, DNSSECã¯å®Ÿè£…ã—ã¦ãªã„ã€‚ DNSã®è² è·è¨ˆæ¸¬ãƒ„ãƒ¼ãƒ«ã£ã¦ã€ã©ã‚“ãªã®ãŒã‚ã‚‹ã‚“ã ã‚ã†ã€‚ ã‚°ã‚°ã‚‹ã€‚ ãƒ•ãƒªãƒ¼ã®DNSã‚¹ãƒˆãƒ¬ã‚¹ãƒ„ãƒ¼ãƒ« ã®ç´¹ä»‹ dnsperf (é–‹ç™ºå…ƒ Nominum),dnstcpbench(é–‹ç™ºå…ƒ Nether Labs) http://dnsops.jp/event/20130718/20130718-stress-tool-hattori-1.pdf DNSã®è©•ä¾¡ã¨è¨ˆæ¸¬ã®è©± https://www.nic.ad.jp/ja/mat
masudaK 2017/12/15
dns
ãƒªãƒ³ã‚¯
Unboundã¨NSDã®ç´¹ä»‹ã€€BIND9ã¨ã®æ¯”è¼ƒç·¨
1. Unboundã¨NSDã®ç´¹ä»‹ BIND9ã¨ã®æ¯”è¼ƒç·¨ æ—¥æœ¬Unboundãƒ¦ãƒ¼ã‚¶ä¼šã€€æ± å¤§äº® (å¹³ä¼šå“¡) ã‚ªãƒ¼ãƒ—ãƒ³ã‚½ãƒ¼ã‚¹ã‚«ãƒ³ãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ 2014 Tokyo/Fall 2014/10/19 1 2. æ—¥æœ¬Unboundãƒ¦ãƒ¼ã‚¶ä¼šã« ã¤ã„ã¦ â€¢ æ»æ¾¤ã•ã‚“ (@ttkzw) ãŒé‹å–¶ã•ã‚Œã¦ã‚‹è¬Žã®ä¼š â€¢ http://unbound.jp â€¢ Unboundã‚„NSDã‚„ldnsã®ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«ã®ç¿»è¨³ç‰ â€¢ æœ¬å®¶ (http://unbound.net) ã‹ã‚‰ã‚‚å…¬èªã•ã‚Œã¦ã‚‹ â€¢ ç§ã¯ãƒ¦ãƒ¼ã‚¶ä¼šã®MLã«å‚åŠ ã—ã¦ã‚‹ã ã‘â€¦â€¦ 2
masudaK 2017/11/10
dns
ãƒªãƒ³ã‚¯
ioãƒ‰ãƒ¡ã‚¤ãƒ³éšœå®³ã‚’ç†è§£ã™ã‚‹ãŸã‚ã€DNSã®ä»•çµ„ã¿ã«ã¤ã„ã¦å‹‰å¼·ã—ãŸ - $shibayu36->blog;
å…ˆæ—¥ã€ioãƒ‰ãƒ¡ã‚¤ãƒ³ã®éšœå®³ãŒã‚ã£ãŸã®ã ã‘ã©ã€è‡ªåˆ†ãŒDNSã®ä»•çµ„ã¿ã‚’ã‚ˆãåˆ†ã‹ã£ã¦ã„ãªã„ã›ã„ã§ã€ã„ã¾ã„ã¡ã©ã†ã„ã†ã“ã¨ãŒèµ·ã“ã£ã¦ã„ãŸã®ã‹æŠŠæ¡ã§ããªã‹ã£ãŸã€‚ãã“ã§ã€DNSã®ä»•çµ„ã¿ã«ã¤ã„ã¦è»½ãå‹‰å¼·ã—ãŸã®ã§ã€ãã®ãƒ¡ãƒ¢ã‚’æ®‹ã—ã¦ãŠãã€‚å†…å®¹ã¯é–“é•ã£ã¦ã„ã‚‹ã‹ã‚‚ã—ã‚Œãªã„ã®ã§ã€ãã®å ´åˆã¯æŒ‡æ‘˜ã—ã¦ãã ã•ã„ã€‚ DNSã«ã¤ã„ã¦å¦ã‚“ã ã“ã¨ Software Design 2015/4ã®DNSã®æ•™ç§‘æ›¸ãŒéžå¸¸ã«å‹‰å¼·ã«ãªã£ãŸã€‚ã¾ãŸã€ ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆ10åˆ†è¬›åº§ï¼šDNSã‚ãƒ£ãƒƒã‚·ãƒ¥ - JPNICã‚‚å‚è€ƒã«ãªã‚‹ã€‚ æ¨©å¨ã‚µãƒ¼ãƒã¨ãƒ•ãƒ«ãƒªã‚¾ãƒ«ãƒ ã¾ãšã€DNSã‚µãƒ¼ãƒã«ã¯æ¨©å¨ã‚µãƒ¼ãƒã¨ãƒ•ãƒ«ãƒªã‚¾ãƒ«ãƒã®äºŒã¤ã®ç¨®é¡žãŒå˜åœ¨ã™ã‚‹ã€‚ æ¨©å¨ã‚µãƒ¼ãƒ ãƒ‰ãƒ¡ã‚¤ãƒ³ã®æƒ…å ±ã‚’ç®¡ç†ã—ã€è‡ªåˆ†ã®ç®¡ç†ã—ã¦ã„ã‚‹ã‚¾ãƒ¼ãƒ³ã®æƒ…å ±ã‚’æä¾›ã™ã‚‹ã ã‘ã®ã‚µãƒ¼ãƒ å•ã„åˆã‚ã›ãŸãƒ‰ãƒ¡ã‚¤ãƒ³ãŒè‡ªåˆ†ã®ã‚¾ãƒ¼ãƒ³ã®ç®¡ç†ä¸‹ã§ã¯ãªã„å ´åˆã€åˆ¥ã®æ¨©å¨ã‚µãƒ¼ãƒã¸å§”ä»»ã™ã‚‹ã¨ã„ã†æƒ…å ±ã‚’è¿”ã™ ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã‚µãƒ¼ãƒã¨ã‚‚è¨€ã‚ã‚Œã‚‹? ä¾‹) co
masudaK 2017/10/04
dns
ãƒªãƒ³ã‚¯
KSKãƒãƒ¼ãƒ«ã‚ªãƒ¼ãƒãƒ¼ã«ã¤ã„ã¦ - JPNIC
2018å¹´10æœˆ17æ—¥æ›´æ–° 2016å¹´10æœˆã‹ã‚‰ã€ DNSã®èµ·ç‚¹ã¨ãªã‚‹ãƒ«ãƒ¼ãƒˆã‚¾ãƒ¼ãƒ³ã«å¯¾ã—ã¦é‡è¦ãªæ›´æ–°ãŒè¡Œã‚ã‚Œã¦ã„ã¾ã™ã€‚ 2017å¹´9æœˆã«ã¯ã€ ãƒ«ãƒ¼ãƒˆã‚¾ãƒ¼ãƒ³ã‹ã‚‰ã®ä¸€éƒ¨ã®DNSå¿œç”ã®ã‚µã‚¤ã‚ºãŒä¸€æ™‚çš„ã«å¢—åŠ ã™ã‚‹å¤‰æ›´ä½œæ¥ãŒè¡Œã‚ã‚Œã¾ã—ãŸã€‚ ã¾ãŸã€2017å¹´10æœˆã«äºˆå®šã•ã‚Œã¦ã„ãŸKSKã®åˆ‡ã‚Šæ›¿ãˆä½œæ¥ã¯å»¶æœŸã¨ãªã‚Šã¾ã—ãŸãŒã€ 2018å¹´2æœˆ1æ—¥ä»˜ã§ç™ºè¡¨ã•ã‚ŒãŸè¨ˆç”»æ¡ˆã§ã¯2018å¹´10æœˆ11æ—¥ã«æ”¹ã‚ã¦å®Ÿæ–½ã•ã‚Œã‚‹ã“ã¨ã¨ãªã‚Šã¾ã—ãŸã€‚ ã“ã®æ›´æ–°ã«å¯¾ã—ã¦å•é¡Œãªãå¯¾å¿œã™ã‚‹ãŸã‚ã«ã¯ã€DNSã‚µãƒ¼ãƒé‹ç”¨è€…ã ã‘ã§ã¯ãªãã€ ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯é‹ç”¨è€…ã‚‚äº‹å‰ã«èª¿æŸ»ã—ã€ å¿…è¦ãŒã‚ã‚Œã°æº–å‚™ã—ã¦ãŠãã“ã¨ãŒé‡è¦ã§ã™ã€‚ (æ„å›³ã›ãšDNSSECæ¤œè¨¼ãŒæœ‰åŠ¹ã«ãªã£ã¦ã„ã‚‹å ´åˆã‚‚ã‚ã‚Šã¾ã™ã®ã§ã€ å¯¾è±¡å¤–ã¨ãŠè€ƒãˆã®æ–¹ã‚‚ãœã²ã”ä¸€èªãã ã•ã„ã€‚) 2018å¹´9æœˆ16æ—¥ã«é–‹å‚¬ã•ã‚ŒãŸICANNç†äº‹ä¼šã«ãŠã„ã¦ã€KSKãƒãƒ¼ãƒ«ã‚ªãƒ¼ãƒãƒ¼ã®æœ€çµ‚çš„ãªå®Ÿæ–½å¯å¦ã«ã¤ã„ã¦å¯©è°ãŒè¡Œã‚ã‚Œã€ äºˆå®š
masudaK 2017/07/31
DNSå‘¨ã‚Šã¯çµ¶å¯¾å•é¡Œèµ·ã“ã™ã¨ã“ã‚ã‚‹ã‚ˆãªãƒ¼

DNS
ãƒªãƒ³ã‚¯
DNS ãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°
masudaK 2016/11/28
dns
ãƒªãƒ³ã‚¯
AWS Route 53ã§TXTãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’è¿½åŠ ã§ããªã„å ´åˆã®å¯¾å‡¦æ³• - Qiita
Help us understand the probl em. What is going on with this article?
masudaK 2016/11/28
ã•ã™ãŒã«ãƒãƒžã‚‹

DNS
ãƒªãƒ³ã‚¯
DNSã«ã¤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€‚
masudaK 2016/11/28
dns
ãƒªãƒ³ã‚¯
TCPã ã‘ã§DNSã‚µãƒ¼ãƒã«queryã§ãã‚‹ã‚ˆã†ã«ãªã£ã¦ãŸ:Geekãªãºãƒ¼ã˜
DNSãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã¨ã„ãˆã°UDPã®53ç•ªã¨ã„ã†ã‚¤ãƒ¡ãƒ¼ã‚¸ã®æ–¹ã€…ã‚‚éžå¸¸ã«å¤šã„ã¨æ€ã„ã¾ã™ãŒã€1987å¹´ã«ç™ºè¡Œã•ã‚ŒãŸRFC 1035ã®æ™‚ç‚¹ã§DNSãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã®ãƒˆãƒ©ãƒ³ã‚¹ãƒãƒ¼ãƒˆã¨ã—ã¦åˆ©ç”¨ã§ãã‚‹ã®ã¯UDPã¨TCPã§ã‚ã‚‹ã¨è¨˜è¿°ã•ã‚Œã¦ã„ã¾ã™ã€‚ ã—ã‹ã—ã€ã“ã‚Œã¾ã§DNSã«ã¨ã£ã¦ã¯UDPãŒåŸºæœ¬ã§ã—ãŸ(ã‚¾ãƒ¼ãƒ³è»¢é€ã‚’é™¤ã)ã€‚ã€ŒRFC 1123: Requirements for Internet Hostsã€ã«ã¯ã€ä»¥ä¸‹ã®ã‚ˆã†ã«ã‚ã‚Šã¾ã™ã€‚ DNS resolvers and recursive servers MUST support UDP, and SHOULD support TCP, for sending (non-zone-transfer) queries. Specifically, a DNS resolver or server that is sending a non-zone-transfer
masudaK 2016/07/15
ãã†ãªã®ã‹ãƒ¼ã€‚è² è·å¢—ãˆãã†ã ã‘ã©ã€ã‚ˆããªã£ãŸã‚‰ã—ã„ã€‚

dns

tcp
ãƒªãƒ³ã‚¯
CVE-2015-7547 glibc ã«ãŠã‘ã‚‹ getaddrinfo ã®è„†å¼±æ€§ã«ã¤ã„ã¦ â€“ IIJ Security Diary
ã“ã®è„†å¼±æ€§ã¯2016å¹´2æœˆ17æ—¥ã«å¯¾ç–æ¸ˆã¿ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¨å…±ã«å…¬é–‹ã•ã‚Œã¾ã—ãŸã€‚å†…å®¹ã¨ã—ã¦ã¯ getaddrinfo ã®å‘¼ã³å‡ºã—ã«ãŠã„ã¦ã‚¹ã‚¿ãƒƒã‚¯ãƒãƒƒãƒ•ã‚¡ã‚ªãƒ¼ãƒãƒ¼ãƒ•ãƒãƒ¼ãŒç™ºç”Ÿã™ã‚‹ç‰©ã§ã™ã€‚å…¬é–‹æ™‚ç‚¹ã§ä»¥ä¸‹ã®é€šã‚Šã€PoC ã‚’å«ã‚ãŸæŠ€è¡“çš„ãªè©³ç´°ãŒå…¬é–‹ã•ã‚Œã¦ã„ã¾ã™ã€‚æœ¬è¨˜äº‹ã§ã¯ã€è„†å¼±æ€§ãŒç™ºç”Ÿã™ã‚‹ã¾ã§ã®å‡¦ç†ã¨ã€å›žé¿ç–ã«ã¤ã„ã¦è§£èª¬ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ CVE-2015-7547 â€” glibc getaddrinfo() stack-based buffer overflow Google Online Security Blog: CVE-2015-7547: glibc getaddrinfo stack-based buffer overflow è„†å¼±æ€§ã«è‡³ã‚‹ã¾ã§ ä»Šå›žã®è„†å¼±æ€§ã¯ getaddrinfo ã®å‘¼ã³å‡ºã—ã«èµ·å› ã—ã¦ã„ã¾ã™ã€‚è„†å¼±æ€§ã®ã‚ã‚‹ç®‡æ‰€ã¾ã§ã®é–¢æ•°å‘¼ã³å‡ºã—ã¯ä»¥ä¸‹ã®æ§˜ã«ãªã£ã¦ã„ã¾ã™ã€‚ getaddri
masudaK 2016/02/19
dns

glibc

è„†å¼±æ€§
ãƒªãƒ³ã‚¯
JANOG19 â€œã“ã‚Œã§ã„ã„ã®ã‹TTLçŸã„DNS TTLã®ãƒªã‚¹ã‚¯ã‚’è€ƒãˆã‚‹â€
ã“ã‚Œã§ã„ã„ã®ã‹TTL çŸã„DNS TTLã®ãƒªã‚¹ã‚¯ã‚’è€ƒãˆã‚‹ 2007å¹´1æœˆ26æ—¥ æ°‘ç”°é›…äºº æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ JANOG 19@æ²–ç¸„çœŒé‚£è¦‡å¸‚ 2007-01-26 ã“ã‚Œã§ã„ã„ã®ã‹TTL CopyrightÂ©2007 Japan Registry Services Co., Ltd. 2 DNSãƒ—ãƒãƒˆã‚³ãƒ«ã®ãŠã•ã‚‰ã„(1/2) â€¢ å•åˆã›ã¨å¿œç”ã®å˜ç´”ãªå¾€å¾© â€“ ã“ã®åå‰ã®IPã‚¢ãƒ‰ãƒ¬ã‚¹ã¯? â‡’ IPã‚¢ãƒ‰ãƒ¬ã‚¹ã¯XXXXã ã‚ˆ â€¢ ãƒˆãƒ©ãƒ³ã‚¹ãƒãƒ¼ãƒˆã¯ä¸»ã«UDP â€“ æ¡ä»¶ã«ã‚ˆã£ã¦TCPã«ãªã‚‹ã“ã¨ã‚‚ã‚ã‚‹ â€¢ å•åˆã›ãƒ‘ã‚±ãƒƒãƒˆ ã‚¯ã‚¨ãƒªå+ID+etc... â€¢ å¿œç”ãƒ‘ã‚±ãƒƒãƒˆ ã‚¯ã‚¨ãƒªå+ID+å›žç”+etc... ID: è˜åˆ¥ã®ãŸã‚ã®16bitã®å€¤ 2007-01-26 ã“ã‚Œã§ã„ã„ã®ã‹TTL CopyrightÂ©2007 Japan Registry Services Co., Ltd. 3 DNSãƒ—ãƒ
masudaK 2015/08/19
dns

ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£
ãƒªãƒ³ã‚¯
PowerPoint Presentation
DNS 2002 12 19 Internet Week 2002/DNS DAY ( ) (JPRS) <[email protected]> 2002/12/19 Internet Week 2002/DNS DAY 2 â€¢ DNS â€“ â€¢ DNS â€“ 2002/12/19 Internet Week 2002/DNS DAY 3 DNS â€¢ SOA â€“ SOA TTL $TTL â€¢ â€“ NS â€“ MX â€“ CNAME 2002/12/19 Internet Week 2002/DNS DAY 4 SOA â€¢ â€¢ SOA $ORIGIN example.jp. $TTL 86400 @ IN SOA ns1.example.jp. hostmaster.example.jp. ( 2002121901 ; serial 86400 ; refresh 21600 ; retry 2
masudaK 2015/05/27
dns
ãƒªãƒ³ã‚¯
Configuring Amazon Route 53 DNS for Your Heroku App | Heroku Dev Center
The Domain Name System (DNS) is the internetâ€™s routing layer responsible for mapping human-readable domain names (for example, www.heroku.com) into machine-addressable IP addresses (for example, 198.51.100.1). Amazon AWSâ€™s DNS service is called Route 53 and is a highly available and scala ble service. For users with existing AWS infrastructure components, it can be convenient to use Route 53 as you
masudaK 2015/01/27
heroku

dns
ãƒªãƒ³ã‚¯
[PDF]åˆå¿ƒè€…ã®ãŸã‚ã®DNSã®è¨å®šã¨ã‚ˆãã‚ã‚‹ãƒˆãƒ©ãƒ–ãƒ«äº‹ä¾‹
Copyright Â© 2013 æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ 1 Copyright Â© 2013 æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ 1 Copyright Â© 2013 æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ 1 åˆå¿ƒè€…ã®ãŸã‚ã®DNSé‹ç”¨å…¥é–€ - ãƒˆãƒ©ãƒ–ãƒ«ã¨ãã®è§£æ±ºã®ãƒã‚¤ãƒ³ãƒˆ - 2013å¹´7æœˆ19æ—¥ DNS Summer Days 2013 æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ï¼ˆJPRSï¼‰ æ°´é‡Ž è²´å² Copyright Â© 2013 æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ 2 Copyright Â© 2013 æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ 2 Copyright Â© 2013 æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ 2 è¬›å¸«è‡ªå·±ç´¹ä»‹ â€¢ æ°åï¼šæ°´é‡Ž è²´å²ï¼ˆã¿ãšã® ãŸã‹ãµã¿ï¼‰ â€¢ ç”Ÿå¹´æœˆæ—¥ï¼š1988å¹´3æœˆ3æ—¥ï¼ˆ25æ³ï¼‰ â€¢ æ‰€å±žï¼šæ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ï¼ˆJPRSï¼‰ ã‚·ã‚¹ãƒ†ãƒ éƒ¨ â€¢ Unixæ´ï¼š8å¹´ç›®ï¼ˆF
masudaK 2014/07/05
dns
ãƒªãƒ³ã‚¯
ï¼ˆç·Šæ€¥ï¼‰ã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒã‚¤ã‚ºãƒ‹ãƒ³ã‚°æ”»æ’ƒã®å±é™ºæ€§å¢—åŠ ã«ä¼´ã†DNSã‚µãƒ¼ãƒãƒ¼ã®è¨å®šå†ç¢ºèªã«ã¤ã„ã¦ï¼ˆ2014å¹´5æœˆ30æ—¥æ›´æ–°ï¼‰
--------------------------------------------------------------------- â– ï¼ˆç·Šæ€¥ï¼‰ã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒã‚¤ã‚ºãƒ‹ãƒ³ã‚°æ”»æ’ƒã®å±é™ºæ€§å¢—åŠ ã«ä¼´ã† DNSã‚µãƒ¼ãƒãƒ¼ã®è¨å®šå†ç¢ºèªã«ã¤ã„ã¦ï¼ˆ2014å¹´4æœˆ15æ—¥å…¬é–‹ï¼‰ ï½žå•ã„åˆã‚ã›UDPãƒãƒ¼ãƒˆã®ãƒ©ãƒ³ãƒ€ãƒ åŒ–ã®é€Ÿã‚„ã‹ãªç¢ºèªãƒ»å¯¾å¿œã‚’å¼·ãæŽ¨å¥¨ï½ž æ ªå¼ä¼šç¤¾æ—¥æœ¬ãƒ¬ã‚¸ã‚¹ãƒˆãƒªã‚µãƒ¼ãƒ“ã‚¹ï¼ˆJPRSï¼‰ åˆç‰ˆä½œæˆ 2014/04/15ï¼ˆTueï¼‰ æœ€çµ‚æ›´æ–° 2014/05/30ï¼ˆFriï¼‰ ï¼ˆå¯¾ç–ã«é–¢ã™ã‚‹DNSé‹ç”¨è€…å‘ã‘æ–‡æ›¸ã¸ã®ãƒªãƒ³ã‚¯ã‚’è¿½åŠ ï¼‰ --------------------------------------------------------------------- â–¼æœ€è¿‘ã®çŠ¶æ³ æœ€è¿‘ã€æ—¥æœ¬ã®å¤§æ‰‹ISPã«ãŠã„ã¦ã‚«ãƒŸãƒ³ã‚¹ã‚ãƒ¼åž‹æ”»æ’ƒæ‰‹æ³•ã«ã‚ˆã‚‹ã‚‚ã®ã¨è€ƒãˆã‚‰ ã‚Œã‚‹ã‚ãƒ£ãƒƒã‚·ãƒ¥DNSã‚µãƒ¼ãƒãƒ¼ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ãŒå¢—åŠ ã—ã¦ã„ã‚‹æ—¨ã€JP
masudaK 2014/04/16
ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£

DNS
ãƒªãƒ³ã‚¯
ã‚¤ãƒ³ã‚¿ãƒ¼ãƒŽãƒƒãƒˆå´©å£Šè«–è€…ã®ç‹¬ã‚Šè¨€ - é–‹ã„ãŸãƒ‘ãƒ³ãƒ‰ãƒ©ã®ç®± - é•·å¹´æ”¾ç½®ã•ã‚Œã¦ããŸ DNS ã®æã‚‹ã¹ãæ¬ é™¥ãŒæ˜Žã‚‰ã‹ã«
EPIC2014 Google Public DNS (8.8.8.8, 8.8.4.4) ãŠã‚ˆã³ Cloudflare (1.1.1.1, 1.0.0.1) 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€‚ æœ¬æ—¥ã€JPRS ãŒã‚ˆã†ã‚„ãé‡ã„è…°ã‚’ã‚ã’ã¦æ³¨æ„å–šèµ·ã‚’ç™ºã—ã¦ãã‚Œã¾ã—ãŸãŒã€ãã®å†…å®¹ã¯å±é™ºæ€§ã‚’ã‚ˆãç†è§£ã—ã¦å¯¾ç–ã‚’ã¨ã‚‹ã«ã‚ãŸã£ã¦ååˆ†ãªæƒ…å ±ãŒå«ã¾ã‚Œã¦ã„ã‚‹ã¨ã¯ã„ãˆã¾ã›ã‚“ã€‚ ä¸€æ–¹ã§æ³¨æ„æ·±ã„æ”»æ’ƒè€…ãŒæŽ¢ã›ã°ã€ãƒãƒƒãƒˆä¸Šã«ã¯ã™ã§ã«æ·±åˆ»ãªæ”»æ’ƒã‚’è¡Œã†ã®ã«å¿…è¦ãªæƒ…å ±ã¯ååˆ†ã«æµã‚Œã¦ã„ã¾ã™ã€‚ç‰¹ã«ã€JPRS ãŒ3æœˆã«æ…Œã¦ã¦ co.jp ãªã©ã«ã“ã£ãã‚Šå…¥ã‚ŒãŸç½²åä»˜ã TXT ãƒ¬ã‚³ãƒ¼ãƒ‰ã¯å¤§ããªãƒ’ãƒ³ãƒˆã«è¦‹ãˆã¾ã™ã€‚ DNS ã«è©³ã—ã„æ”»æ’ƒè€…ã§ã‚ã‚Œã°ã€æ”»æ’ƒæ‰‹æ³•ã«è¾¿ã‚Šã¤ãã®ã¯æ™‚é–“ã®å•é¡Œã§ã—ã‚‡ã†ã€‚(ã™ã§ã«æ”»æ’ƒã¯è¡Œã‚ã‚Œã¦ã„ã‚‹ã‹ã‚‚çŸ¥ã‚Œã¾ã›ã‚“) é•·ãç§˜å¯†ã«ã—ã¦ãŠãã“ã¨ã¯å¾—ç–ã§ã¯ãªã„ã¨åˆ¤æ–ã—ã€é˜²å¾¡ã™ã‚‹å´ã®å¿ƒæ§‹ãˆã¨æ‰‹åŠ©ã‘ã«ã—
masudaK 2014/04/16
ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£

DNS
ãƒªãƒ³ã‚¯
å¼·çƒˆãªDNSã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒã‚¤ã‚ºãƒ‹ãƒ³ã‚°æ‰‹æ³•ãŒå…¬é–‹ã•ã‚Œã‚‹:Geekãªãºãƒ¼ã˜
æœ¬æ—¥ã€JPRSãŒç·Šæ€¥ã®æ³¨æ„å–šèµ·ã‚’å…¬è¡¨ã—ã¾ã—ãŸã€‚ ç·Šæ€¥ï¼‰ã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒã‚¤ã‚ºãƒ‹ãƒ³ã‚°æ”»æ’ƒã®å±é™ºæ€§å¢—åŠ ã«ä¼´ã†DNSã‚µãƒ¼ãƒãƒ¼ã®è¨å®šå†ç¢ºèªã«ã¤ã„ã¦ï¼ˆ2014å¹´4æœˆ15æ—¥å…¬é–‹ï¼‰- å•ã„åˆã‚ã›UDPãƒãƒ¼ãƒˆã®ãƒ©ãƒ³ãƒ€ãƒ åŒ–ã®é€Ÿã‚„ã‹ãªç¢ºèªãƒ»å¯¾å¿œã‚’å¼·ãæŽ¨å¥¨ ãã‚Œã«å¯¾ã—ã¦ã€2æœˆä¸æ—¬ã«è„†å¼±æ€§ã‚’ç™ºè¦‹ã—ã¦JPRSã¸ã¨å ±å‘Šã—ã¦ã„ãŸéˆ´æœ¨æ°(è„†å¼±æ€§ã¯å‰é‡Žæ°ã¨ã®å…±åŒç™ºè¦‹)ãŒã€JPRSã®æ³¨æ„å–šèµ·ã§ã¯ã€Œå±é™ºæ€§ã‚’ã‚ˆãç†è§£ã—ã¦å¯¾ç–ã‚’ã¨ã‚‹ã«ã‚ãŸã£ã¦ååˆ†ãªæƒ…å ±ãŒå«ã¾ã‚Œã¦ã„ã‚‹ã¨ã¯ã„ãˆã¾ã›ã‚“ã€ã¨ã—ã¦ã€ä»¥ä¸‹ã®æƒ…å ±ã‚’å…¬é–‹ã—ã¦ã„ã¾ã™ã€‚ é–‹ã„ãŸãƒ‘ãƒ³ãƒ‰ãƒ©ã®ç®± - é•·å¹´æ”¾ç½®ã•ã‚Œã¦ããŸDNSã®æã‚‹ã¹ãæ¬ é™¥ãŒæ˜Žã‚‰ã‹ã« ã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒã‚¤ã‚ºãƒ‹ãƒ³ã‚°ã®é–‹ã„ãŸãƒ‘ãƒ³ãƒ‰ãƒ©ã®ç®± ã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒã‚¤ã‚ºãƒ‹ãƒ³ã‚°ã®é–‹ã„ãŸãƒ‘ãƒ³ãƒ‰ãƒ©ã®ç®± - 2 - æœ¬æ¥ã§ã‚ã‚Œã°ã€ã‚ˆã‚Šä¸Šä½ã‹ã‚‰ã®æ£è¦ã®å›žç”ãŒå„ªå…ˆã•ã‚Œãªã‘ã‚Œã°ãªã‚‰ãªã„ã¯ãšãªã®ã«ã€ä¸‹ä½å´ãŒå„ªå…ˆã•ã‚Œã‚‹ä»•æ§˜ã«ãªã£ã¦ã„ã‚‹ã®ã§ã€å½è£…ã•ã‚ŒãŸãƒ‡ãƒ¼ã‚¿ãŒå„ªå…ˆã•ã‚Œã¦ã—ã¾ã†
masudaK 2014/04/16
DNS

ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£
ãƒªãƒ³ã‚¯
æ–°ãŸãªDNSã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒã‚¤ã‚ºãƒ‹ãƒ³ã‚°æ‰‹æ³•ã€ç¬¬ä¸€ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆä¾¿ä¹—æ”»æ’ƒã«ã¤ã„ã¦ - ä»™è±†ã®ãƒ¬ã‚·ãƒ”
ä»¥å‰IPv6 summitã«å‚åŠ ã—ãŸã¨ãã«èžã„ãŸãŠè©±ã®ä¸ã«ã‚ã£ãŸã€æ˜¨å¹´(2013å¹´ï¼‰8æœˆã«ç™ºè¡¨ã•ã‚ŒãŸæ–°ãŸãªDNSã‚ãƒ£ãƒƒã‚·ãƒ¥ãƒã‚¤ã‚ºãƒ‹ãƒ³ã‚°æ‰‹æ³•ã€Œç¬¬ä¸€ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆä¾¿ä¹—æ”»æ’ƒã€ã«ã¤ã„ã¦èˆˆå‘³ãŒã‚ã„ãŸã®ã§ã„ã‚ã„ã‚èª¿ã¹ãŸã‚Šå®Ÿéš›ã«ã§ãã‚‹ã®ã‹ã‚’è©¦ã—ãŸã‚Šã—ã¦ã¿ã¾ã—ãŸã€‚ï¼ˆã‚‚ã¡ã‚ã‚“è‡ªåˆ†ã®ç®¡ç†ã™ã‚‹ã‚¯ãƒãƒ¼ã‚ºãƒ‰ãªç’°å¢ƒã§ï¼‰ ç¬¬ä¸€ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆä¾¿ä¹—æ”»æ’ƒã‚’ã‚°ãƒ¼ã‚°ãƒ«ã§æ¤œç´¢ã—ã¦ã‚‚å€‹äººã®ãƒ–ãƒã‚°ç‰ãŒå‡ºã¦ã“ãªã„ã®ã§ã“ã‚ŒãŒç¬¬ä¸€ã€Œç¬¬ä¸€ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆä¾¿ä¹—æ”»æ’ƒã€ä¾¿ä¹—ã‚¨ãƒ³ãƒˆãƒªã§ã™ï¼ˆåˆ¥ã«ã†ã¾ããªã„ï¼‰ æ”»æ’ƒã‚³ãƒ¼ãƒ‰ç‰ã‚ã‚Šã¾ã™ãŒã€ã‘ã£ã—ã¦è‡ªåˆ†ã®ç®¡ç†ã™ã‚‹ç’°å¢ƒä»¥å¤–ã«ä½¿ç”¨ã—ãªã„ã§ãã ã•ã„ ç¬¬ä¸€ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆä¾¿ä¹—æ”»æ’ƒã¨ã¯ ç¬¬ä¸€ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆä¾¿ä¹—æ”»æ’ƒã¨ã¯ã€DNSå¿œç”ãŒãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆã•ã‚ŒãŸå ´åˆDNSå¿œç”ã®åŒå®šã«ä½¿ãˆã‚‹è¦ç´ ï¼ˆUDPãƒãƒ¼ãƒˆç•ªå·ã€å•ã„åˆã‚ã›IDã€å•ã„åˆã‚ã›åï¼‰ãŒä¸€ã¤ç›®ã®ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆã«ã—ã‹ãªã„ã“ã¨ã‚’åˆ©ç”¨ã—ã€äºŒã¤ç›®ã®ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒˆã‚’å½è£…ã™ã‚‹ã“ã¨ã«ã‚ˆã£ã¦æ¯’å…¥ã‚Œã‚’ã™ã‚‹ã¨ã„ã†D
masudaK 2014/03/24
ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£

dns
ãƒªãƒ³ã‚¯
1 2 æ¬¡ã®ãƒšãƒ¼ã‚¸