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Re: ipchains firewall rules



Ethan Benson wrote:

> hi,
>
> <snip>
>
> what i tried was adding 3 new rules to the very beginning of the input chain
>
> ipchains -I input 1 -p tcp -i ppp0 -d 0.0.0.0/0 53 -j ACCEPT
> ipchains -I input 2 -p tcp -i ppp0 -d 0.0.0.0/0 113 -j ACCEPT
> ipchains -I input 3 -l -p tcp -y -i ppp0 0.0.0.0/0 :1023 -j REJECT
>
> but as i mentioned i get DENY logs for various ports below 1024 from
> IPs which i presume are from my ISP.
>
> any pointers to good books and such on firewalling would be nice too.
>
> </snip>

Are the deny's perhaps UDP packets?

dyer



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