Servidor Wireless c/ controle de banda (ajuda)

Pessoal

Fiz oque o tutorial desse link pedia pra montar o servidor,
Servidor Linux para um provedor wireless

quando usei o último comando para ativar o servidor apareceu o seguinte erro...(uso o ubuntu 7.0.4 e fiz todas as atualizações)
A net tá compartilhada só preciso agora fazer o controle de banda.

root@nailton-desktop:/usr/sbin# sh /etc/provedor/configurador.sh
iptables: No chain/target/match by that name
Stopping CBQ traffic shaping: shaper.
Starting CBQ traffic shaping: find: warning: you have specified the -maxdepth option after a non-option argument (, but options are not positional (-maxdepth affects tests specified before it as well as those specified after it). Please specify options before other arguments.

find: warning: you have specified the -maxdepth option after a non-option argument (, but options are not positional (-maxdepth affects tests specified before it as well as those specified after it). Please specify options before other arguments.

RTNETLINK answers: No such file or directory
RTNETLINK answers: File exists
RTNETLINK answers: File exists
shaper.
root@nailton-desktop:/usr/sbin# vim /etc/provedor/firewall.sh
root@nailton-desktop:/usr/sbin#

agradeço à todos... =)