关闭ipv6

sysctl

临时禁用

echo 1 >/proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 >/proc/sys/net/ipv6/conf/default/disable_ipv6

or

sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1

永久禁用

echo " ">>/etc/sysctl.conf
echo "# made for disabled IPv6 in $(date +%F)">>/etc/sysctl.conf
echo 'net.ipv6.conf.all.disable_ipv6 = 1'>>/etc/sysctl.conf
echo 'net.ipv6.conf.default.disable_ipv6 = 1'>>/etc/sysctl.conf
echo 'net.ipv6.conf.lo.disable_ipv6 = 1'>>/etc/sysctl.conf
tail -5 /etc/sysctl.conf
sysctl -p
netstat -anptl

or

vim /etc/sysctl.conf
------------------------------------------------------
# Made for disabled IPv6 .
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
-------------------------------------------------------