Vic,
I'd suggest you have a look at the ipchains HOWTO, it's a lot easier than
you'd imagine. It's got some useful examples in section 4.
You can do stuff like reject all tcp packets from the ppp0 interface except
for particular addresses and ports.
And stuff like reject all SYN tcp packets (which are the ones for initiating
connections).
As we're on the internet, the only protocols that are available I believe,
are udp,tcp and icmp.
HTH
Pak
Vic wrote:
> Well I don't know why I waited so long,
> but it happened, some butthead cracked
> into my linux box, trashed things while they
> were at it, and helped themselves to web access,
> my e mail service, and a dealy called news groups,
> sending out threats to someone and my ISP
> thought it was me, but I did not have a firewall
> setup so I don't have firewall logs to show anyone.
>
> I am a total beginner with firewall setup,
> so please go easy on me, as I know nothing
> about firewalls other than they block things
> from out on the net such as what happened
> to me.
>
> whoever has the patience with me to do a step
> by step setup with me will be greatly appreciated.
>
> Meanwhile, as I wait for a reply I will read up
> the howto's and try to soak up as much info
> from them as I can and ask any other questions
> I have later.
>
> Many thanks.
>
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>
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