I had this problem too. I block unauthorized users with the .htaccess
script, so Idon't think the method that checks $_GET for a key would
work. You can find out the (albeit temporary) ip address by checking
your access.log to see which ip address au...
I had this problem too. I know this is an old thread, but it still seems
to be an issue. You can find out the ip address by checking your
access.log to see which ip address authorize.net comes from after a
transaction. Then just add that to your .hta...
