Hi,
I´m trying to configure iptables rules, but ...
I´m testing the rules in a separeted environment, but the final topology will be the following
ADSL -- [ LINUX ] -- LOCAL NETWORK
The script look like this
#!/bin/sh
INTIF=eth0
EXTIF=eth1
INTIP=192.168.0.3
EXTIP=172.16.0.3
echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp
echo 1 > /proc/sys/net/ipv4/conf/eth1/proxy_arp
echo 1 > /proc/sys/net/ipv4/ip_forward
for f in /proc/sys/net/ipv4/conf/*/rp_filter;
do
echo 1 > $f;
done
iptables -F INPUT
iptables -F OUTPUT
iptables -F FORWARD
iptables -A INPUT -j DROP
iptables -A FORWARD -j DROP
iptables -A OUTPUT -j DROP
...
iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o $EXTIF -j SNAT --to-source $EXTIP
When the script run the last rule ( NAT ), occurs an error : iptables invalid argument.
I want that the iptables change the source IP address ( 192.168 ) to his ip address ( 172.16.0.3 ) to all connection to Internet
Could anyone help me ?
Thanks in advanced
João Carlos
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