Enabling anonymous ftp according to the manual and handbook results in "530 User anonymous unknown". Please provide a working example / steps for setting up anonymous ftp in FreeBSD.
Could you provide a link to the handbook page that you were following please?
Often the convention is that the anonymous FTP users' username is 'ftp'
In a process of reproducing this issue on another machine I discovered that the ftp user was actually added using an unsupported method which did not compile spwd.db. Once the user was added correctly now everything works.