Setting up a server behind a (effing) livebox

So the livebox is:

• in violation with the GPL (they use linux and don't release the code)
• a piece of sh*t that can't even do port forwarding correctly (i.e the dhcp server is buggy, no possibility to add static MAC addresses)

The solution

Use upnp (oh noes!) -> go get miniupnpc

The tool you'll want after the make command is done is upnpc-static, you don't need to make install that way.
Just copy that tool to /root/bin or change the path in the following script.

Here is the initscript i use on ubuntu to set up port forwarding to ssh and the ftpd:

#! /bin/sh

### BEGIN INIT INFO
# Provides:          forwarding
# Required-Start:    $network
# Required-Stop:     $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Script that sets up forwarding for ssh, ftp and web external acces
# Description:       Script that sets up forwarding for ssh, ftp and web external acces
### END INIT INFO

NAME=forwarding
DESCRIPTION="Script that sets up forwarding for ssh, ftp, munin and web external acces"
UPNPCMD=/root/bin/upnpc-static

# Exit if the package is not installed
test -x $CMD || exit 0

# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

do_start () {
    log_daemon_msg "Starting $DESCRIPTION" "$NAME"
    CMD="$UPNPCMD -r 22 TCP 21 TCP 80 TCP 4949 TCP"
    for port in $(seq 49152 49170); do
        CMD="$CMD $port TCP"
    done
    $CMD 2>&1 > /dev/null
    log_end_msg $?
    return $?
}

do_stop () {
    log_daemon_msg "Stopping $DESCRIPTION" "$NAME"
    CMD="$UPNPCMD -d 22 TCP 21 TCP 80 TCP"
    for port in $(seq 49152 49170); do
        CMD="$CMD $port TCP"
    done
    $CMD 2>&1 > /dev/null
    log_end_msg $?
    return $?
}

case "$1" in
    start)
    do_start
    ;;
    stop)
    do_stop
    ;;
    restart|force-reload)
    do_stop
    do_start
    ;;

    *)
    log_success_msg "Usage: $0 {start|stop|restart}"
    exit 1
esac

exit 0