Hvis vi m: ftp-proxy

Kjrer som deamon

/etc/rc.conf[.local]

ftpproxy_flags=""

/etc/pf.conf

Ankere i NAT-del

nat-anchor "ftp-proxy/*"
rdr-anchor "ftp-proxy/*"

en omdirigering (rdr)

rdr pass on $int_if proto tcp from any to any port ftp -> 127.0.0.1 \
         port 8021

i filtreringsreglene

anchor "ftp-proxy/*"
pass out proto tcp from $proxy to any port 21 keep state