TTL(Time To Live)\u306e\u4ed5\u7d44\u307f\u3092\u5229\u7528\u3057\u3066\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u6b63\u3057\u3044\u304b\u78ba\u8a8d\u3067\u304d\u308b
\n\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u30d1\u30b1\u30c3\u30c8\u304c\u5ef6\u3005\u30eb\u30fc\u30d7\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001IP\u30d8\u30c3\u30c0\u306b\u3066TTL(\u30db\u30c3\u30d7\u6570)\u3092\u6307\u5b9a\u3067\u304d\u308b
\n\u30eb\u30fc\u30bf(\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4)\u3092\u7d4c\u7531\u3059\u308b\u3068TTL\u30921\u6e1b\u3089\u3057\u3066\u3044\u304d
\n0\u306b\u306a\u3063\u305f\u3089\u30d1\u30b1\u30c3\u30c8\u3092\u7834\u68c4\u3057\u3066\u3001\u30db\u30b9\u30c8\u306bTime Exceeded\u30a8\u30e9\u30fc(Type=11)\u3092\u9001\u4fe1\u3059\u308b<\/p>\n
traceroute\u306fTTL=1\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u4fe1\u3059\u308b\u3001\u6b21\u306bTTL=2\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u4fe1\u3059\u308b\u3001\u6b21\u306bTTL=3\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u4fe1\u3059\u308b\u3001\u30fb\u30fb\u30fb
\n\u306e\u7e70\u308a\u8fd4\u3057\u3067\u3001\u7d50\u679c\u3092\u9806\u756a\u306b\u8a18\u8f09\u3057\u3066\u3044\u304f<\/p>\n
\r\nroot@hostname:\/home\/shimizu# ping 8.8.8.8\r\nPING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.\r\n64 bytes from 8.8.8.8: icmp_req=1 ttl=48 time=39.4 ms\r\n64 bytes from 8.8.8.8: icmp_req=2 ttl=48 time=44.2 ms\r\n64 bytes from 8.8.8.8: icmp_req=3 ttl=48 time=43.9 ms\r\n\r\n--- 8.8.8.8 ping statistics ---\r\n3 packets transmitted, 3 received, 0% packet loss, time 2003ms\r\nrtt min\/avg\/max\/mdev = 39.428\/42.546\/44.227\/2.213 ms\r\nroot@hostname:\/home\/shimizu# traceroute 8.8.8.8\r\ntraceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets\r\n 1 * * *\r\n 2 * * *\r\n 3 oshrt1s-hrt1b.bb.sakura.ad.jp (157.17.146.145) 3.741 ms 3.758 ms *\r\n 4 osdrt2-nrt1s-1.bb.sakura.ad.jp (157.17.146.29) 3.696 ms * *\r\n 5 210.173.178.56 (210.173.178.56) 18.053 ms 18.054 ms 18.044 ms\r\n 6 * 209.85.255.156 (209.85.255.156) 1.039 ms 0.939 ms\r\n 7 * * *\r\n 8 209.85.243.248 (209.85.243.248) 12.616 ms * *\r\n 9 64.233.174.199 (64.233.174.199) 40.516 ms 209.85.255.39 (209.85.255.39) 52.923 ms 209.85.255.217 (209.85.255.217) 38.533 ms\r\n10 * 209.85.243.23 (209.85.243.23) 48.866 ms 209.85.250.103 (209.85.250.103) 47.638 ms\r\n11 * * *\r\n12 google-public-dns-a.google.com (8.8.8.8) 40.637 ms 46.575 ms 44.791 ms\r\n<\/pre>\n\u30eb\u30fc\u30bf\u304cICMP Time Exceeded\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3084\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u304b\u3089ICMP\u30d1\u30b1\u30c3\u30c8\u3092\u30d5\u30a3\u30eb\u30bf\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001* * * \u3068\u306a\u308b<\/p>\n
\u304a\u307e\u3051-mtr<\/h2>\n
traceroute\u3088\u308a\u3082\u8a73\u7d30\u306a\u60c5\u5831\u3092\u51fa\u529b\u3059\u308b\u30c4\u30fc\u30eb\u3068\u3057\u3066mtr\u304c\u3042\u308b<\/p>\n
\r\nroot@hostname:\/home\/admin# aptitude install mtr-tiny\r\nroot@hostname:\/home\/admin# mtr 8.8.8.8\r\n\r\n My traceroute [v0.82]\r\nhostname (0.0.0.0) Sun Jun 29 02:10:54 2014\r\nKeys: Help Display mode Restart statistics Order of fields quit\r\n Packets Pings\r\n Host Loss% Snt Last Avg Best Wrst StDev\r\n 1. ec2-175-41-192-220.ap-northeast-1.compute.amazonaws.com 0.0% 10 0.6 0.6 0.4 0.8 0.1\r\n 2. 27.0.0.172 0.0% 10 0.8 2.3 0.5 9.3 2.9\r\n 3. 27.0.0.154 0.0% 10 2.0 5.1 1.8 33.3 9.9\r\n 4. 27.0.0.136 0.0% 10 2.1 5.5 1.9 32.2 9.5\r\n 5. 15169.tyo.equinix.com 0.0% 10 2.3 2.2 2.0 2.4 0.1\r\n 6. 72.14.239.202 0.0% 10 31.5 5.6 2.3 31.5 9.1\r\n 7. 209.85.255.36 0.0% 10 4.9 8.0 4.8 18.5 4.7\r\n 8. 209.85.255.39 0.0% 10 40.4 39.8 35.3 50.1 5.1\r\n 9. 209.85.243.23 0.0% 10 37.6 37.6 37.3 38.1 0.2\r\n10. ???\r\n11. google-public-dns-a.google.com 0.0% 9 36.9 36.8 36.6 37.0 0.1\r\n<\/pre>\n\u53c2\u8003<\/h2>\n
http:\/\/www.atmarkit.co.jp\/fnetwork\/netcom\/traceroute\/traceroute.html<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6982\u8981 TTL(Time To Live)\u306e\u4ed5\u7d44\u307f\u3092\u5229\u7528\u3057\u3066\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u6b63\u3057\u3044\u304b\u78ba\u8a8d\u3067\u304d\u308b \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u30d1\u30b1\u30c3\u30c8\u304c\u5ef6\u3005\u30eb\u30fc\u30d7\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001IP\u30d8\u30c3\u30c0\u306b\u3066TTL(\u30db\u30c3\u30d7\u6570)\u3092\u6307\u5b9a\u3067\u304d\u308b \u30eb\u30fc\u30bf(\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[11,8],"tags":[],"_links":{"self":[{"href":"https:\/\/tech.akat.info\/index.php?rest_route=\/wp\/v2\/posts\/591"}],"collection":[{"href":"https:\/\/tech.akat.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tech.akat.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tech.akat.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tech.akat.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=591"}],"version-history":[{"count":4,"href":"https:\/\/tech.akat.info\/index.php?rest_route=\/wp\/v2\/posts\/591\/revisions"}],"predecessor-version":[{"id":1383,"href":"https:\/\/tech.akat.info\/index.php?rest_route=\/wp\/v2\/posts\/591\/revisions\/1383"}],"wp:attachment":[{"href":"https:\/\/tech.akat.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tech.akat.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=591"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tech.akat.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}