Digging deeper the JSP file is looking for IPv6 and only IPv6...
var ip = '';
var IE = !!(window.attachEvent && navigator.userAgent.indexOf('Opera') === -1);
function checkIPv6(v)
{
return (/::/.test(v) ? /^([\da-f]{1,4}(:|::)){1,6}[\da-f]{1,4}$/i.test(v) : /^([\da-f]{1,4}:){7}[\da-f]{1,4}$/i.test(v));
}
if (ip == '') ip = location.host;
if (IE && checkIPv6(ip)) ip = '[' + ip + ']';
location.href='
https://' + ip + '/';