Linux IPv6 関連コマンドメモ

Linux で IPv6 を利用する際の基本的なコマンドメモ

インタフェイスに付与されたアドレス確認

$ ip address show dev eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9001 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 06:a3:df:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    inet 172.31.xx.xx/20 brd 172.31.xx.xx scope global eth0
       valid_lft forever preferred_lft forever
    inet6 2xxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::xxxx:xxxx:xxxx:xxxx/64 scope link 
       valid_lft forever preferred_lft forever

ルーティングテーブル

$ ip -6 route list type unicast
2xxx:xxxx:xxxx:xxxx::/64 dev eth0  proto kernel  metric 256  pref medium
fe80::/64 dev eth0  proto kernel  metric 256  pref medium
default via fe80::xxxx:xxxx:xxxx:xxxx dev eth0  proto ra  metric 1024  expires xxxsec hoplimit 64 pref medium

Ping 疎通確認

• localhost

$ ping6 ::1

• google

$ ping6 2001:4860:4860::8888

curl 接続確認

$ curl -6 -i https://www.jpn.earth/remote_addr.cgi
HTTP/2 200 
date: Mon, 29 Jul 2019 14:54:49 GMT
content-type: text/plain; charset=UTF-8

2xxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx

DNS

$ dig aaaa www.google.com +rec +short
2404:6800:4004:81a::2004

公開サービス

$ ss -al -6
Netid                  State                   Recv-Q                  Send-Q                                    Local Address:Port                                              Peer Address:Port                  
raw                    UNCONN                  0                       0                                                     *:ipv6-icmp                                                    *:*                     
udp                    UNCONN                  0                       0                                                     *:dhcpv6-client                                                *:*                     
udp                    UNCONN                  0                       0                                                     *:45617                                                        *:*                     
udp                    UNCONN                  0                       0                                                     *:mdns                                                         *:*                     
tcp                    LISTEN                  0                       128                                                [::]:ssh                                                       [::]:*