ftp: Må vi så må vi (omdirigering)

ftp over nat: ftp-proxy

/etc/inetd.conf

 127.0.0.1:8021 stream tcp nowait root /usr/libexec/ftp-proxy \
   ftp-proxy -n

- start inetd på nytt

FreeBSD+NetBSD$ sudo /etc/rc.d/inetd restart
OpenBSD$ sudo kill -HUP `cat /var/run/inetd.pid` 

/etc/pf.conf

 rdr on $indre proto tcp from any to any port ftp -> 127.0.0.1 \
   port 8021
 # [...]
 pass in on $ytre inet proto tcp from port ftp-data to ($ytre) \
    user proxy flags S/SA keep state

- last de nye reglene

$ sudo pfctl -f /etc/pf.conf