não acha eth1

Meu pc tem duas placas de rede...

eth0 Link encap:Ethernet Endereço de HW 00:E0:7D:B5:63:86
inet end.: 192.168.254.3 Bcast:192.168.254.255 Masc:255.255.255.0
endereço inet6: fe80::2e0:7dff:feb5:6386/64 Escopo:Link


eth1 Link encap:Ethernet Endereço de HW 00:90:27:79:22:72
inet end.: 192.168.1.4 Bcast:192.168.1.255 Masc:255.255.255.0
endereço inet6: fe80::290:27ff:fe79:2272/64 Escopo:Link

e quando eu starto meu script ele da os seguintes erros...

iptables: Unknown error 4294967295
iptables: Unknown error 4294967295
iptables v1.3.5: host/network `eth1' not found
Try `iptables -h' or 'iptables --help' for more information.
iptables v1.3.5: host/network `eth1' not found
Try `iptables -h' or 'iptables --help' for more information.
iptables v1.3.5: host/network `eth1' not found
Try `iptables -h' or 'iptables --help' for more information.
iptables v1.3.5: host/network `eth1' not found
Try `iptables -h' or 'iptables --help' for more information.


meu script...

#!/bin/sh

# Variáveis
# -------------------------------------------------------
iptables=/sbin/iptables
IF_EXTERNA=eth0
IF_INTERNA=eth1


# Ativa módulos
# -------------------------------------------------------
#/sbin/modprobe iptable_nat
/sbin/modprobe ip_conntrack
/sbin/modprobe ip_conntrack_ftp
/sbin/modprobe ip_nat_ftp
/sbin/modprobe ipt_LOG
/sbin/modprobe ipt_REJECT
/sbin/modprobe ipt_MASQUERADE


# Ativa roteamento no kernel
# -------------------------------------------------------
echo "1" > /proc/sys/net/ipv4/ip_forward


# Proteção contra IP spoofing
# -------------------------------------------------------
#echo "1" > /proc/sys/net/ipv4/conf/all/rp_filter


# Zera regras
# -------------------------------------------------------
$iptables -F
$iptables -X
$iptables -F -t nat
$iptables -X -t nat
$iptables -F -t mangle
$iptables -X -t mangle


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


#################################################
# Tabela FILTER
#################################################


# Dropa pacotes TCP indesejáveis
# -------------------------------------------------------
$iptables -A FORWARD -p tcp -m tcp ! --syn -m state --state NEW -j LOG --log-level 6 --log-prefix "FIREWALL: NEW sem syn: "
$iptables -A FORWARD -p tcp -m tcp ! --syn -m state --state NEW -j DROP


# Dropa pacotes mal formados
# -------------------------------------------------------
$iptables -A INPUT -i $IF_EXTERNA -m unclean -j LOG --log-level 6 --log-prefix "FIREWALL: pac mal formado: "
$iptables -A INPUT -i $IF_EXTERNA -m unclean -j DROP


# Aceita os pacotes que realmente devem entrar
# -------------------------------------------------------
$iptables -A INPUT -i ! $IF_EXTERNA -j ACCEPT
$iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
$iptables -A OUTPUT -m state --state ESTABLISHED,RELATED,NEW -j ACCEPT
$iptables -A FORWARD -m state --state ESTABLISHED,RELATED,NEW -j ACCEPT


# Proteção contra trinoo
# -------------------------------------------------------
$iptables -N TRINOO
$iptables -A TRINOO -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FIREWALL: trinoo: "
$iptables -A TRINOO -j DROP
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 27444 -j TRINOO
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 27665 -j TRINOO
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 31335 -j TRINOO
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 34555 -j TRINOO
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 35555 -j TRINOO


# Proteção contra tronjans
# -------------------------------------------------------
$iptables -N TROJAN
$iptables -A TROJAN -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FIREWALL: trojan: "
$iptables -A TROJAN -j DROP
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 666 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 666 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 4000 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 6000 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 6006 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 16660 -j TROJAN


# Proteção contra worms
# -------------------------------------------------------
$iptables -A FORWARD -p tcp --dport 135 -i $IF_INTERNA -j REJECT


# Proteção contra syn-flood
# -------------------------------------------------------
$iptables -A FORWARD -p tcp --syn -m limit --limit 2/s -j ACCEPT


# Proteção contra ping da morte
# -------------------------------------------------------
$iptables -A FORWARD -p icmp --icmp-type echo-request -m limit --limit 1/s -j ACCEPT


# Proteção contra port scanners
# -------------------------------------------------------
$iptables -N SCANNER
$iptables -A SCANNER -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FIREWALL: port scanner: "
$iptables -A SCANNER -j DROP
$iptables -A INPUT -p tcp --tcp-flags ALL FIN,URG,PSH -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags ALL NONE -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags ALL ALL -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags ALL FIN,SYN -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags SYN,FIN SYN,FIN -i $IF_EXTERNA -j SCANNER


# Loga tentativa de acesso a determinadas portas
# -------------------------------------------------------
$iptables -A INPUT -p tcp --dport 21 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: ftp: "
$iptables -A INPUT -p tcp --dport 23 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: telnet: "
$iptables -A INPUT -p tcp --dport 25 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: smtp: "
$iptables -A INPUT -p tcp --dport 80 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: http: "
$iptables -A INPUT -p tcp --dport 110 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: pop3: "
$iptables -A INPUT -p udp --dport 111 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: rpc: "
$iptables -A INPUT -p tcp --dport 113 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: identd: "
$iptables -A INPUT -p tcp --dport 137:139 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: samba: "
$iptables -A INPUT -p udp --dport 137:139 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: samba: "
$iptables -A INPUT -p tcp --dport 161:162 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: snmp: "
$iptables -A INPUT -p tcp --dport 6667:6668 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: irc: "
$iptables -A INPUT -p tcp --dport 3128 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: squid: "


# Libera acesso externo a determinadas portas
# -------------------------------------------------------
$iptables -A INPUT -p tcp --dport 22 -i $IF_EXTERNA -j ACCEPT


#################################################
# Tabela NAT
#################################################


#Ativa mascaramento de saída
# -------------------------------------------------------
$iptables -t filter -A FORWARD -d 0/0 -s $IF_INTERNA -o $IF_EXTERNA -j ACCEPT
$iptables -t filter -A FORWARD -d $IF_INTERNA -s 0/0 -i $IF_EXTERNA -j ACCEPT
$iptables -t nat -A POSTROUTING -o $IF_EXTERNA -j MASQUERADE
$iptables -t filter -A INPUT -s $IF_INTERNA -d 0/0 -j ACCEPT
$iptables -t filter -A OUTPUT -d $IF_INTERNA -s 0/0 -j ACCEPT



#Proxy Transparente
# -------------------------------------------------------
#$iptables -t nat -A PREROUTING -i $IF_INTERNA -p tcp --dport 80 -j REDIRECT --to-port 2000

Achei uns erros no seu script, os parâmetros -d (--destination) e -s (--source) devem ser aplicados a endereços e não a interfaces:

Citação:

---

Postado originalmente por rafaelmontek

#Ativa mascaramento de saída
# -------------------------------------------------------
$iptables -t filter -A FORWARD -d 0/0 -s $IF_INTERNA -o $IF_EXTERNA -j ACCEPT
$iptables -t filter -A FORWARD -d $IF_INTERNA -s 0/0 -i $IF_EXTERNA -j ACCEPT
$iptables -t nat -A POSTROUTING -o $IF_EXTERNA -j MASQUERADE
$iptables -t filter -A INPUT -s $IF_INTERNA -d 0/0 -j ACCEPT
$iptables -t filter -A OUTPUT -d $IF_INTERNA -s 0/0 -j ACCEPT

---

Troque o -d por -o e o -s por -i, vai ficar assim:

Código :

---

#Ativa mascaramento de saída
# -------------------------------------------------------
$iptables -t filter -A FORWARD -d 0/0 -i $IF_INTERNA -o $IF_EXTERNA -j ACCEPT
$iptables -t filter -A FORWARD -o $IF_INTERNA -s 0/0 -i $IF_EXTERNA -j ACCEPT
$iptables -t nat -A POSTROUTING -o $IF_EXTERNA -j MASQUERADE
$iptables -t filter -A INPUT -i $IF_INTERNA -d 0/0 -j ACCEPT
$iptables -t filter -A OUTPUT -o $IF_INTERNA -s 0/0 -j ACCEPT

---

Se quiser depurar melhor o script, insira na segunda linha:

Código :

---

set -x

---

vai dar para ver quais linhas estão gerando erro.

referente a esse erro:

Citação:

---

ptables: Unknown error 4294967295
ptables: Unknown error 4294967295
ptables v1.3.5: host/network `eth1' not found
Try `iptables -h' or 'iptables --help' for more information.
#ptables v1.3.5: host/network `eth1' not found
Try `iptables -h' or 'iptables --help' for more information.
iptables v1.3.5: host/network `eth1' not found
Try `iptables -h' or 'iptables --help' for more information.
#ptables v1.3.5: host/network `eth1' not found
Try `iptables -h' or 'iptables --help' for more information.

---

vi que vc ta usando o ipt 1.3.5 com certeza vc deve estar usando o kernel 2.4, nao que o ipt nao funcione no kernel 2.4 mas vc precisa recompilalo verifique artigos na under sobre isso