You can set up multiple IP addresses to have permanent access to your FTP without a time limit.
It is not possible to unlock FTP for a DNS address.
The FTP server cannot authenticate the DNS address against the information passed via your FTP client, and therefore cannot confirm that you are coming from the correct address.
Article ID: 302
Created On: Fri, Mar 13, 2015 at 3:33 PM
Last Updated On: Thu, Apr 16, 2015 at 1:32 PM
Online URL: https://www.heartinternet.uk/support/article/can-i-unlock-ftp-for-multiple-ip-addresses-or-a-dns-address.html