ソフトウェア/linux/メモ

一時的に IPv6 を禁止する†

http://l-w-i.net/t/ubuntu/ipv6_001.txt

LANG:console
$ ip a
 ...
 3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
     link/ether 00:0a:35:00:01:22 brd ff:ff:ff:ff:ff:ff
     inet 192.168.42.79/24 brd 192.168.42.255 scope global eth0
        valid_lft forever preferred_lft forever
     inet6 fe80::20a:35ff:fe00:122/64 scope link
        valid_lft forever preferred_lft forever
 ...
$ sudo sysctl net.ipv6.conf.all.disable_ipv6=1 net.ipv6.conf.default.disable_ipv6=1
 net.ipv6.conf.all.disable_ipv6 = 1
 net.ipv6.conf.default.disable_ipv6 = 1
$ ip a
 ...
 3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
     link/ether 00:0a:35:00:01:22 brd ff:ff:ff:ff:ff:ff
     inet 192.168.42.79/24 brd 192.168.42.255 scope global eth0
        valid_lft forever preferred_lft forever
 ...