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Re: nat help!


itachi@cnt.uo.edu.cu a écrit :
im trying to nat some address here

What is the networking environment : interfaces, networks, routers, hosts, routes, addresses ?

but nothing happeds

Of course something happens. Somethings always HAS to happen. It's just that sometimes what happens is not what you expect. So you have to find out what happens to know what's wrong. ;-) Some tools such as the iptables LOG target and network traffic capture tools (tcpdump, ethereal) may help you in that burden.

iptables -P INPUT ACCEPT
iptables -t nat -P PREROUTING ACCEPT
iptables -t nat -P POSTROUTING ACCEPT

No defaut policy setting for the OUTPUT chain in the nat table ?

## Empezamos a filtrar
## Nota: eth0 es el interfaz conectado al router y eth1 a la LAN
# El localhost se deja (por ejemplo conexiones locales a mysql)
/sbin/iptables -A INPUT -i lo -j ACCEPT

Useless : according to the above, the INPUT default policy is already set to ACCEPT.

iptables -t nat -A PREROUTING --dst -p tcp --dport 80 -j DNAT \

According to this rule, incoming HTTP connections (except on loopback interface) to will be redirected to

echo 1 > /proc/sys/net/ipv4/ip_forward

thats all on my iptables config
what i have to add to make that rule work

This rule sure works. Something else may be wrong.

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