See the INSTALL file for details of compile time options
and some configuration information. By default frox uses
/usr/local/etc/frox.conf as a configuration file, but
this can be changed either by giving
--enable-configfile=/etc/whatever/you/want to the
./configure script, or by the -f command line
option.
The sample config file is well commented and the best documentation for configuration. Note you will need to edit some of these options for it to work at all.
For the transparent proxying to work your kernel will need
to be compiled with transparent proxy support and you will need
to enable forwarding with ``echo 1 >>
/proc/sys/net/ipv4/ip_forward''. You then need to
redirect ftp requests passing through the box to frox. For
kernel 2.2 this will be something like ``ipchains -A input
-p tcp -s LOCALNET -d 0/0 21 -j REDIRECT 2121'', and for
kernel 2.4, ``iptables -t nat -A PREROUTING -p tcp -s
LOCALNET --dport 21 -j REDIRECT --to 2121''.
Normally you don't have to. Certainly don't set the ftp proxy variable in your browser or set your ftp_proxy environment variable to http://anything.
If you are using non-transparent ftp proxying (set ``DoNTP'' to ``yes'' in the config file) and you have a ftp client which supports this (such as ncftp, or debian's apt-get ftp method) then you need to set it up to login with username ``username@host[:port]''. eg. ``anonymous@ftp.gnu.org'' or ``anonymous@ftp.gnu.org:21''. You can of course do this manually by typing in this when prompted for the username.