In case IPv6 is not enabled on your CentOS box, you may want to check /etc/modprobe.d/ipv6.conf file:
To enable IPv6, comment out "options ipv6 disable=1" line and reboot.
In case IPv6 is not enabled on your CentOS box, you may want to check /etc/modprobe.d/ipv6.conf file:
To enable IPv6, comment out "options ipv6 disable=1" line and reboot.