ioftpd bouncer setup

[jannat]

hi,
i have setup a bouncer, and now want to configure ioftpd to only accept connections from the bouncerip and port.
How do i do this ?

my config,

ioftpd 4.94 with ssl
no eggdrop, bot, irc, ident or something

I just found the "get external ident" = false/true thing,
but I don't use ident and where can I setup the ip for the incomming connections ?
Do I have to setup an 2nd device with host and bind ?

any tips are welcome
thx