Re: script firewall

[Antony Stone <Antony@Soft-Solutions.co.uk>]

On Tuesday 20 April 2004 8:53 pm, Luis GUSTAVO wrote:

> I´m looking for a firewall script, for my ADSL conection, and share
> my conection.
>
> And i want block ports 1024:65535

I assume you mean you want to block *incoming* ports (in which case I wonder 
why you only want to block above 1023), so how about this:

iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -i $int_IF -o $ext_IF -j ACCEPT
iptables -A POSTROUTING -t nat -o $ext_IF -j MASQUERADE

Let us know if you have any problems with it, or if there is anything I didn't 
understand from your requirements.

Regards,

Antony.

-- 
Most people have more than the average number of legs.

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