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Depending on how you would like to start ftpd-tls(8) you have two choices:
1) Add the following line to /etc/rc.conf or /etc/rc.conf.local:

ftpd_tls_enable="YES"

For further available configuration variables when using this method see
/usr/local/etc/rc.d/ftpd-tls{,.sh}.

2) Add the following entries to your /etc/inetd.conf:

ftp stream tcp  nowait root /usr/local/libexec/ftpd-tls ftpd-tls -U -l
ftp stream tcp6 nowait root /usr/local/libexec/ftpd-tls ftpd-tls -U -l

See /usr/local/share/doc/ftpd-tls/README.TLS and the openssl(1) manual
page for further information on how to generate the certificates and
the keys and where to place them.

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