IPset ports question.

Jozsef Kadlecsik kadlec at blackhole.kfki.hu
Tue Jul 19 22:09:28 CEST 2005


Hi Rob,

On Tue, 19 Jul 2005, Rob Carlson wrote:

> iptables -A testset -m set --set testset src -j
> LTREJECT
> iptables -I FORWARD 2 -i eth1 -j testset
> iptables -I INPUT 2 -i eth1 -j testset
>
> This works fine for blocking all traffic.  However
> since I now want specifically to only drop port 22
> and port 25 entries (that is most of the nuisance
> traffic) and allow port 80 for example,  I did the
> following:
>
> ipset -N ports portmap --from 1 --to 1024
> ipset -A ports 22
> ipset -A ports 25
> ipset -B testset :default: -b ports

You missed to replace the iptables command above with the one
which instruct the SET target to follow bindings. What you need is

iptables -A testset -m set --set testset src,dst -j LTREJECT

Best regards,
Jozsef
-
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