CentOS7关闭IPv6

查看环境

$ cat /proc/sys/net/ipv6/conf/default/disable_ipv6 
0

$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0

设置参数

$ cat << EOF | sudo tee /etc/sysctl.d/disableIPv6.conf >> /dev/null
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
EOF

生效参数

$ sudo sysctl -p /etc/sysctl.d/disableIPv6.conf
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

验证

$ cat /proc/sys/net/ipv6/conf/default/disable_ipv6 
1

$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
1

$ ip -6 a

查看IPv6地址为空即可