iptables help

[mike lan]

hello
still learnin iptables.
I need to setup an iptables script for an untrusted lan network , the
firewall should only connect to two or three ip address on the lan and drop
any other ip address on the lan .

thanks

[Samuel Kidman]

On Wed, Oct 6, 2010 at 5:34 AM, mike lan  wrote:
> hello
> still learnin iptables.
> I need to setup an iptables script for an untrusted lan network , the
> firewall should only connect to two or three ip address on the lan and drop
> any other ip address on the lan .
>
> thanks
>
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> I think this would do it:

iptables -t filter --append INPUT --destination <ip address 1>,<ip address
2>,<ip address 3> -j ACCEPT
iptables -t filter --append INPUT -j DROP

so if the packet is going to one of the three trusted computers it gets
accepted, otherwise dropped.