永久禁用IPv6

cat >> /etc/sysctl.conf << EOF

net.ipv6.conf.all.disable_ipv6 = 1

net.ipv6.conf.default.disable_ipv6 = 1
EOF

指定网卡禁用

net.ipv6.conf.eth0.disable_ipv6 = 1

重载配置文件

sysctl -p

修改内存禁用IPv6

echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6
或
sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1