Perguntas & Respostas

Galera boa noite.
Criei um arquivo co nome "conet.mac" com o seguinte conteudo:

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#!/bin/sh

nternet=eth1
#Rede Interna=eth0

# Ativa módulos
modprobe ip_tables
modprobe iptable_nat
modprobe ip_conntrack
modprobe ip_nat_ftp
modprobe ipt_REJECT
modprobe ipt_MASQUERADE

# Zera regras
iptables -F
iptables -X
iptables -F -t nat
iptables -X -t nat
iptables -F -t filter
iptables -X -t filter


# Determina a política padrão
iptables -P INPUT DROP
iptables -P FORWARD DROP

# Aceita os pacotes que realmente devem entrar
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# Controle de acesso IP X MAC

# Cliente 1
iptables -t filter -A FORWARD -d 0/0 -s 192.168.0.2 -m mac --mac-source 00:0B:05:EC:0D:5A -j ACCEPT
iptables -t filter -A FORWARD -d 192.168.0.2 -s 0/0 -j ACCEPT
iptables -t filter -A INPUT -s 192.168.0.2 -d 0/0 -m mac --mac-source 00:0B:05:EC:0D:5A -j ACCEPT
iptables -t nat -A POSTROUTING -s 192.168.0.2 -o eth1 -j MASQUERADE

# Cliente 2
iptables -t filter -A FORWARD -d 0/0 -s 192.168.0.3 -m mac --mac-source 00:0C:86:00:00:00 -j ACCEPT
iptables -t filter -A FORWARD -d 192.168.0.3 -s 0/0 -j ACCEPT
iptables -t filter -A INPUT -s 192.168.0.3 -d 0/0 -m mac --mac-source 00:0C:86:00:00:00 -j ACCEPT
iptables -t nat -A POSTROUTING -s 192.168.0.3 -o eth1 -j MASQUERADE

# Cliente 3
iptables -t filter -A FORWARD -d 0/0 -s 192.168.0.4 -m mac --mac-source 00:28:00:35:00:00 -j ACCEPT
iptables -t filter -A FORWARD -d 192.168.0.4 -s 0/0 -j ACCEPT
iptables -t filter -A INPUT -s 192.168.0.4 -d 0/0 -m mac --mac-source 00:28:00:35:00:00 -j ACCEPT
iptables -t nat -A POSTROUTING -s 192.168.0.4 -o eth1 -j MASQUERADE

#Compartilha a conexão
echo 1 > /proc/sys/net/ipv4/ip_forward

#Fecha o resto
iptables -A INPUT -j DROP
iptables -A FORWARD -j DROP
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Pergunta de um novato como sou:

Como faço para executar este garoto? Observando que toda vez que eu tento ele me dá esta mensagem:

[root@conetbrasil etc]# ./conet.mac
-bash: ./conet.mac: Permission denied
[root@conetbrasil etc]#