I'm confused by your question ... IIRC in.ftpd doesn't really use a configuration file, but if there is an account called ftp with a valid shell in /etc/passwd then anonymous logins are allowed, otherwise they are not. The "password" specified is recorded in /var/log/xferlog for anonymous users. Most people no longer use wu.ftpd (it has had a bevy of security issues in the past and there are ftp daemons with more features available).
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