Proftpd
From Atomicorp Wiki
www proftpd[21489]: http://www.domain.com (10.10.10.10[10.10.10.10]) - Refused PORT
This was determined to be caused by settings in dreamweaver. Customer did not report what the setting change needed to be. Regardless if ASL was installed or not, ftp would not work because of this *client side* setting.