FreeBSD configuring syscons:blanktime problem solution

I have found too many people have configuring syscons:blanktime hangs problem.
The reason is that, you didnt set your /etc/rc.conf and /etc/hosts files properly.

edit thoses files like:
/etc/hosts
::1 freebsd.anyname.org localhost
127.0.0.1 freebsd.anyname.org localhost

/etc/rc.conf
hostname = "freebsd.anyname.org"

then, reboot your system. It will get through the problem