Disable IPv6 Use follow command in root access sysctl -w net.ipv6.conf.all.disable_ipv6=1 sysctl -w net.ipv6.conf.default.disable_ipv6=1 Enable IPv6 Use follow command in root access sysctl -w net.ipv6.conf.all.disable_ipv6=0 sysctl -w net.ipv6.conf.default.disable_