Re: [Fedora-users-br] iptables travando a máquina na inicialização
Otto Fuchshuber Filho
o2to2f em gmail.com
Sábado Maio 26 23:01:00 UTC 2007
Abra tudo para localhost e veja se resolve seu problema.
iptables -A INPUT -i lo -j ACCEPT
Coloque esta regra como a primeira, antes das demais.
Saudações,
Otto Fuchshuber Filho
o2to2f em gmail.com
PaTricK escreveu, Em 26-05-2007 17:39:
> Olá,
> Pensei q essa regra aqui:
> iptables -A INPUT -p tcp --syn -s 127.0.0.1/255.0.0.0 -j ACCEPT
>
> que tem no meu script service pra isso... ela esta errada pra esse caso?
> obrigado!
>
> PaTricK
>
>
> Otto Fuchshuber Filho escreveu:
>>
>> Abra uma regra na chain INPUT permitindo tudo para source de localhost.
>>
>> Saudações,
>> Otto Fuchshuber Filho
>> o2to2f em gmail.com
>>
>> PaTricK escreveu, Em 26-05-2007 12:28:
>>> Ele trava na hora que vai abrir a interface gráfica.
>>> quando aparece "daemon HAL..."
>>>
>>> trava somente se deixo essas regras no iptables
>>>
>>>
>>>
>>> que bloqueia tudo no INPUT para depois ir liberando somente o que quero.
>>> Se uso essas regras aqui:
>>>
>>> iptables -P FORWARD ACCEPT
>>> iptables -P INPUT ACCEPT
>>> iptables -P OUTPUT ACCEPT
>>>
>>>
>>> Ele nao trava com essas regras no ACCEPT para liberar tudo.
>>>
>>>
>>> PaTricK
>>>
>>> Fabio Aragao escreveu:
>>>> vc sabe axatamente onde esta o problema ???
>>>> caso negativo vc pode tentar uma pequeno macetezinho
>>>> coloque um echo em deteminado ponto no script tipo;
>>>>
>>>> echo "erro começo"
>>>>
>>>> regra
>>>> regra
>>>> regra
>>>>
>>>> echo "erro final"
>>>>
>>>>
>>>> execute o script e o que aparecer entre estes "echos"
>>>> vc ja vai eliminando onde esta o erro do que ficar
>>>> procurando linha por linha.....
>>>>
>>>> ou
>>>>
>>>> utilize este inicio
>>>>
>>>> echo "Limpando regras do firewall"
>>>> ###################
>>>> # FLUSH ALL RULES #
>>>> ###################
>>>> iptables -P INPUT ACCEPT
>>>> iptables -P OUTPUT ACCEPT
>>>> iptables -P FORWARD ACCEPT
>>>> iptables -t nat -P PREROUTING ACCEPT
>>>> iptables -t nat -P POSTROUTING ACCEPT
>>>> iptables -t nat -P OUTPUT ACCEPT
>>>>
>>>> iptables -t mangle -P PREROUTING ACCEPT
>>>> iptables -t mangle -P OUTPUT ACCEPT
>>>>
>>>>
>>>> #
>>>> # flush all the rules in the filter and nat tables.
>>>> #
>>>> iptables -F
>>>> iptables -t nat -F
>>>> iptables -t mangle -F
>>>>
>>>> #
>>>> # erase all chains that's not default in filter and
>>>> nat table.
>>>> #
>>>> iptables -X
>>>> iptables -t nat -X
>>>> iptables -t mangle -X
>>>>
>>>> #
>>>> # zera contadores de todas as chains.
>>>> #
>>>> iptables -Z
>>>> iptables -t nat -Z
>>>> iptables -t mangle -Z
>>>>
>>>> espero que ajude
>>>>
>>>>
>>>>
>>>> --- PaTricK <patrick_rsl em yahoo.com.br> escreveu:
>>>>
>>>>
>>>>> Eu resolvi bloquea tudo com o iptables... mas quando
>>>>> o computador está iniciando ele trava na parte
>>>>> "daemon HAL..."
>>>>> Ele trava somente quando boto essas regras:
>>>>>
>>>>> iptables -F
>>>>> iptables -t nat -F
>>>>>
>>>>> iptables -P FORWARD DROP
>>>>> iptables -P INPUT DROP
>>>>> iptables -P OUTPUT ACCEPT
>>>>>
>>>>> Gostaria de saber o que tenho que libera pra ele não
>>>>> travar? ou se não é esse o problema qual é?
>>>>>
>>>>> Aqui está meu iptables :
>>>>>
>>>>> iptables -F
>>>>> iptables -t nat -F
>>>>>
>>>>> iptables -P FORWARD DROP
>>>>> iptables -P INPUT DROP
>>>>> iptables -P OUTPUT ACCEPT
>>>>>
>>>>> iptables -A POSTROUTING -t nat -p all -s 10.1.1.0/29
>>>>> -o eth0 -j MASQUERADE
>>>>>
>>>>> #Libera Loopback
>>>>> iptables -A INPUT -p tcp --syn -s
>>>>> 127.0.0.1/255.0.0.0 -j ACCEPT
>>>>> iptables -t nat -A POSTROUTING -o lo -j ACCEPT
>>>>>
>>>>> iptables -A OUTPUT -p icmp -s 10.1.1.2 -d
>>>>> 10.1.1.0/255.255.255.248 --icmp-type 8 -j ACCEPT
>>>>> iptables -A INPUT -p icmp -s 10.1.1.2 -d
>>>>> 10.1.1.0/255.255.255.248 --icmp-type 8 -j ACCEPT
>>>>> iptables -A OUTPUT -p icmp -s 10.1.1.2 -d
>>>>> 10.1.1.0/255.255.255.248 --icmp-type 0 -j ACCEPT
>>>>> iptables -A INPUT -p icmp -s 10.1.1.2 -d
>>>>> 10.1.1.0/255.255.255.248 --icmp-type 0 -j ACCEPT
>>>>>
>>>>> iptables -A OUTPUT -p udp -s 10.1.1.2 -d 0/0 --dport
>>>>> 53 -j ACCEPT
>>>>> iptables -A INPUT -p udp -s 0/0 -d 10.1.1.2 --sport
>>>>> 53 -j ACCEPTiptables -A INPUT -p icmp -s 0/0 -d 10.1.1.2
>>>>> --icmp-type 0 -j
>>>>> ACCEPT
>>>>> iptables -A OUTPUT -p tcp -s 10.1.1.2 -d 0/0 --dport
>>>>> 80 -j ACCEPT
>>>>> iptables -A INPUT -p tcp -s 0/0 -d 10.1.1.2 --sport
>>>>> 80 -j ACCEPT
>>>>>
>>>>> iptables -A FORWARD -p udp -s 192.168.1.0/24 -d 0/0
>>>>> --dport 53 -j ACCEPT
>>>>> iptables -A FORWARD -p udp -s 0/0 -d 192.168.1.0/24
>>>>> --sport 53 -j ACCEPT
>>>>> iptables -A FORWARD -p icmp -s 192.168.1.0/24 -d 0/0
>>>>> --icmp-type 8 -j ACCEPT
>>>>> iptables -A FORWARD -p icmp -s 0/0 -d 192.168.1.0/24
>>>>> --icmp-type 0 -j ACCEPT
>>>>> iptables -A FORWARD -p tcp -s 192.168.1.0/24 -d 0/0
>>>>> --dport 80 -j ACCEPT
>>>>> iptables -A FORWARD -p tcp -s 0/0 -d 192.168.1.0/24
>>>>> --sport 80 -j ACCEPT
>>>>>
>>>>>
>>>>> #Libera e-mail e SSH
>>>>> iptables -A INPUT -s 0/0 -p tcp -m multiport --sport
>>>>> 2222,25,110,4617 -j ACCEPT
>>>>> iptables -A INPUT -s 0/0 -p tcp -m multiport --dport
>>>>> 2222,25,110,4617 -j ACCEPT
>>>>>
>>>>> #Libera MSN
>>>>> iptables -A INPUT -s 0/0 -p tcp -m multiport --sport
>>>>>
>>>>> 1863,1864,6891,6900,6901,1863,5190,6901 -j ACCEPT
>>>>> iptables -A INPUT -s 0/0 -p tcp -m multiport --dport
>>>>>
>>>>> 1863,1864,6891,6900,6901,1863,5190,6901 -j ACCEPT
>>>>>
>>>>> iptables -A POSTROUTING -t nat -p all -s 10.1.1.0/29
>>>>> -o eth0 -j MASQUERADE
>>>>>
>>>>> #SQUID
>>>>> #/sbin/modprobe iptables_nat
>>>>>
>>>>> #iptables -t nat -A PREROUTING -i eth0 -s 0/0 -p tcp
>>>>> --dport 80 -j REDIRECT --to-port 3128
>>>>>
>>>>> #iptables -t nat -A PREROUTING -s 0/0 -p tcp --dport
>>>>> 80 -j REDIRECT --to-port 3128
>>>>>
>>>>> #iptables -t nat -A PREROUTING -s 0/0 -p udp --dport
>>>>> 80 -j REDIRECT --to-port 3128
>>>>> iptables -A OUTPUT -p icmp -s 10.1.1.2 -d 0/0
>>>>> --icmp-type 8 -j ACCEPT
>>>>>
>>>>> #VNCserver
>>>>> iptables -A INPUT -p tcp --dport 5801 -j ACCEPT
>>>>> iptables -A INPUT -p tcp --dport 5901 -j ACCEPT
>>>>>
>>>>> #Nessus
>>>>> iptables -A INPUT -p tcp --dport 1241 -j ACCEPT
>>>>>
>>>>> #Azureus
>>>>> #iptables -A INPUT -p tcp --dport 18637 -j ACCEPT
>>>>> iptables -A INPUT -p tcp --dport 35558 -j ACCEPT
>>>>> iptables -A INPUT -p udp --dport 35558 -j ACCEPT
>>>>>
>>>>> #Portas eMule
>>>>>
>>>>> iptables -A INPUT -s 0/0 -p tcp -m multiport --sport
>>>>>
>>>>> 4662,443,4661,4462,4242,3306 -j ACCEPT
>>>>> iptables -A INPUT -s 0/0 -p udp -m multiport --sport
>>>>>
>>>>> 4662,443,4661,4462,4242,3306 -j ACCEPT
>>>>> iptables -A INPUT -s 0/0 -p tcp -m multiport --dport
>>>>>
>>>>> 4662,443,4661,4462,4242,3306 -j ACCEPT
>>>>> iptables -A INPUT -s 0/0 -p udp -m multiport --dport
>>>>>
>>>>> 4662,443,4661,4462,4242,3306 -j ACCEPT
>>>>> iptables -t nat -A PREROUTING -i eth0 -p tcp --dport
>>>>> 4662 -j DNAT --to-destination 10.1.1.2
>>>>> iptables -t nat -A PREROUTING -i eth0 -p tcp -m
>>>>> multiport --dports 443,4661,4462,4242,3306 -j DNAT --to-destination
>>>>> 10.1.1.2
>>>>> iptables -t nat -A PREROUTING -i eth0 -p udp -m
>>>>> multiport --dports 4672,4465,4468,4246,3310 -j DNAT --to-destination
>>>>> 10.1.1.2
>>>>> iptables -t nat -A PREROUTING -i eth0 -p udp --dport
>>>>> 1024: -j DNAT --to-destination 10.1.1.2
>>>>>
>>>>> Alguem poderia me dar uma dica?
>>>>> Valeu!
>>>>>
>>>>> PaTricK
>>>>>
>>>>>
>>>>> --
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>>>>>
>>>>>
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