On standard win7 64-bit, with IPv4 and IPv6 enabled my.ini values:
port=3306
bind-address = ::1
This should bind to only loopback, only in IPv6, however NETSTAT shows:
C:\>netstat -an |findstr 3306
TCP 0.0.0.0:3306 0.0.0.0:0 LISTENING
TCP [::1]:3306 [::]:0 LISTENING
Telnet shows a better story (the 0.0.0.0 is not really there?):
C:\>telnet 127.0.0.1 3306
(Seems like TCP connect failure)
Months ago I posted a bug about this, and yesterday it was triaged asking for more information and pointing me at the definition of INADDR_ANY in NETSTAT (irrelavant since ::1 is LOOPBACK **not** INADDR_ANY).
http://bugs.mysql.com/bug.php?id=72087
But... My response yesterday got no activity perhaps it'll be checked in another 6 months.