FTP server denied public IP

Hi All,

Has anyone experienced this issue where the FTP server blocked an external public IP address and placed in the IP Access as denied? What follow after is horrific, slowly internal servers that access to the FTP server also get blocked if there is an IP address in the IP Access list.

The denied IP is not an admin blocking it but the ftp server blocking it. This is what I am experiencing on version: 15.1.4.6

Thanks,

Thomas