dig
ping6$ dig www.iijmio.jp AAAA ; <<>> DiG 9.10.3-P4-Ubuntu <<>> www.iijmio.jp AAAA ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55109 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www.iijmio.jp. IN AAAA ;; ANSWER SECTION: www.iijmio.jp. 300 IN AAAA 2001:240:bb81:8f00::77 ;; Query time: 2 msec ;; SERVER: 157.7.180.133#53(157.7.180.133) ;; WHEN: Sat May 27 20:48:59 JST 2017 ;; MSG SIZE rcvd: 70
$ ping6 -c 3 www.iijmio.jp PING www.iijmio.jp(2001:240:bb81:8f00::77 (2001:240:bb81:8f00::77)) 56 data bytes 64 bytes from 2001:240:bb81:8f00::77 (2001:240:bb81:8f00::77): icmp_seq=1 ttl=53 time=2.27 ms 64 bytes from 2001:240:bb81:8f00::77 (2001:240:bb81:8f00::77): icmp_seq=2 ttl=53 time=2.13 ms 64 bytes from 2001:240:bb81:8f00::77 (2001:240:bb81:8f00::77): icmp_seq=3 ttl=53 time=2.25 ms --- www.iijmio.jp ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 2.130/2.218/2.272/0.083 ms
# sysctl -w net.ipv6.conf.all.disable_ipv6=1CentOS7 で恒久的にIPv6を無効化する
# sysctl -w net.ipv6.conf.default.disable_ipv6=1
/etc/sysctl.d/disable_ipv6.conf
net.ipv6.conf.all.disable_ipv6 = 1# sysctl -p /etc/sysctl.d/disable_ipv6.conf
net.ipv6.conf.default.disable_ipv6 = 1
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May/28/2017 AM 08:15