The command that is used to configure FTP caching services is:
ftp {age-multiplier directory-listing dl_time file fo_time | max-ttl {days directory-listing dlmax_days file fmax_days | hours directory-listing dlmax_hours file fmax_hours | minutes directory-listing dlmax_ min file fmax_min | seconds directory-listing dlmax_ sec file fmax_sec} | min-ttl min_minutes | object max-size size | proxy {anonymous-pswd
passwd | incoming port | outgoing host {hostname | ipaddress} port | reval-each-request {all | directory-listing | none} | serve-ims directory-listing age_percent file age_percent}