Network: Natd: Redirecting ports using
(last edit: 2001-03-18)
                   Redirecting ports to an internal private space address is best done using natd and the 
"-redirect_port" option. The easiest way to do this is to add to /etc/rc.conf the line: 
natd_flags="-f /etc/natd.conf"

Next make a file /etc/natd.conf which contains:
----------------------------------------------------
alias_address    24.132.90.99
# alias_address is alleen nodig als de -n optie niet 
# word gebruikt. Zie "man natd".

use_sockets yes
same_ports yes
redirect_port    tcp    192.168.0.6:4000    4000
redirect_port    udp    192.168.0.6:4000    4000

# om deze file te begruiken moet in rc.conf de regel 
# natd_flags="-f /etc/natd.conf"
# worden toegevoegd.
----------------------------------------------------

If you want (for example) port 2221 to redirect to port 21 on a internal 
server with a privatespace ip, you should add a config line that looks something 
like:
redirect_port   tcp     192.168.1.123:21        2221
                ^^^           ^^^     ^^        ^^^^
            protocoll   | private-  | port    | port on
           to redirect  | space ip  | to re-  | local machine
                        | to re-    | direct  |
                        | direct to | to.     |

I you have any question mail them to:

Sjoerd
 Send your questions to:  I.dont.get.it@t-l.org