--- IMS <[EMAIL PROTECTED]> wrote:

> Hi all
> 
> I try to write FTP rules with ftp-proxy.
> However after try for serveral hours..
> It isn't work..

It depends what kind of FTP you are looking at.  Most FTP clients these
days use passive FTP.  In this case, you do not need ftp-proxy at all. 
You
just need two rules in addition to your nat line.  This assumes you are
filtering on only the external interface.  This should get you started:

# PASSIVE FTP
# 1. Firewall contacts ftp servers on behalf of passive ftp clients
#    on port 21 in order to make control requests.

pass out on $EXT \
        inet proto tcp \
        from $EXT \
        to any port 21 \
        keep state

# 2. Firewall contacts ftp servers on behalf of passive ftp clients
#    on unprivileged port range ( > 1024 ) in order to make
#    data requests.

pass out on $EXT \
        inet proto tcp \
        from $EXT \
        to any port $UNP_ports \
        keep state

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