Somebody had been trying to brute force my FTP server with a username the doesn't even exist, but it got me thinking I should upgrade my security. It would be impractical to filter by IP as the places I access it from will have dynamic IP, but I was thinking of setting up a Dynamic Domain service which points to my computer and then only allowing connections to filezilla from that domain.
However when I try to set up IP filtering on FileZilla using the domain it says invalid IP (As it obviously isn't an IP)
So is there a solution to this? Use a different FTP server that can do it, plugin for filezilla or other security suggestion?