| コマンド | 説明 |
|---|---|
| dig | dig (domain information groper) は、 DNS (DomainName System) サーバから情報を集めるために使われる柔軟なコマンドラインツールです |
% dig yahoo.co.jp ; <<>> DiG 9.3.4 <<>> yahoo.co.jp ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27368 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2 ;; QUESTION SECTION: ;yahoo.co.jp. IN A ;; ANSWER SECTION: yahoo.co.jp. 300 IN A 203.216.227.176 yahoo.co.jp. 300 IN A 124.83.139.192 ;; AUTHORITY SECTION: yahoo.co.jp. 484 IN NS dnsg01.yahoo.co.jp. yahoo.co.jp. 484 IN NS ns10.yahoo.co.jp. : (略) :
ANSWER SECTION から
203.216.227.176 と 124.83.139.192 であることが分かる
% dig yahoo.co.jp mx ; <<>> DiG 9.3.4 <<>> yahoo.co.jp mx ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13326 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 5, ADDITIONAL: 17 ;; QUESTION SECTION: ;yahoo.co.jp. IN MX ;; ANSWER SECTION: yahoo.co.jp. 404 IN MX 10 mx3.mail.yahoo.co.jp. yahoo.co.jp. 404 IN MX 10 mx5.mail.yahoo.co.jp. yahoo.co.jp. 404 IN MX 10 mx1.mail.yahoo.co.jp. yahoo.co.jp. 404 IN MX 10 mx2.mail.yahoo.co.jp. : (略) :
ANSWER SECTION から
mx{1,2,3,5}.mail.yahoo.co.jp であることが分かる
% dig yahoo.co.jp any ; <<>> DiG 9.3.4 <<>> yahoo.co.jp any ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3786 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 5, ADDITIONAL: 17 ;; QUESTION SECTION: ;yahoo.co.jp. IN ANY ;; ANSWER SECTION: yahoo.co.jp. 339 IN MX 10 mx5.mail.yahoo.co.jp. yahoo.co.jp. 339 IN MX 10 mx1.mail.yahoo.co.jp. yahoo.co.jp. 339 IN MX 10 mx2.mail.yahoo.co.jp. yahoo.co.jp. 339 IN MX 10 mx3.mail.yahoo.co.jp. ;; AUTHORITY SECTION: jp. 38102 IN NS D.dns.jp. jp. 38102 IN NS E.dns.jp. jp. 38102 IN NS F.dns.jp. jp. 38102 IN NS a.dns.jp. jp. 38102 IN NS B.dns.jp. ;; ADDITIONAL SECTION: mx1.mail.yahoo.co.jp. 339 IN A 203.216.243.173 mx1.mail.yahoo.co.jp. 339 IN A 124.83.155.153 mx1.mail.yahoo.co.jp. 339 IN A 124.147.39.209 mx1.mail.yahoo.co.jp. 339 IN A 203.216.243.171 mx2.mail.yahoo.co.jp. 339 IN A 124.147.39.208 mx2.mail.yahoo.co.jp. 339 IN A 203.216.243.170 mx2.mail.yahoo.co.jp. 339 IN A 124.83.171.181 mx2.mail.yahoo.co.jp. 339 IN A 124.83.171.182 mx3.mail.yahoo.co.jp. 339 IN A 203.216.247.183 mx3.mail.yahoo.co.jp. 339 IN A 203.216.247.184 mx3.mail.yahoo.co.jp. 339 IN A 124.147.39.207 mx3.mail.yahoo.co.jp. 339 IN A 203.216.243.172 mx5.mail.yahoo.co.jp. 339 IN A 203.216.247.181 mx5.mail.yahoo.co.jp. 339 IN A 203.216.247.182 mx5.mail.yahoo.co.jp. 339 IN A 124.83.179.206 mx5.mail.yahoo.co.jp. 339 IN A 124.83.183.240 B.dns.jp. 61991 IN A 202.12.30.131 ;; Query time: 4 msec ;; SERVER: 192.168.10.254#53(192.168.10.254) ;; WHEN: Sun Feb 10 22:18:37 2007 ;; MSG SIZE rcvd: 470