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Re: Iptables :: priority of rules



Sorry for the information I've forgotten to give to you. I've set the INPUT policy to DROP

BR


Res a écrit :
On Fri, 23 Feb 2007, Luc MAIGNAN wrote:

In fact, isn't what I wrote ?


No, I believe Tim meant a default drop "policy" then the rules you add are accepts.

eg:
iptables -P INPUT DROP
iptables -A INPUT -s 192.168.0.0/24 -j ACCEPT
iptables -A INPUT -s special.ip.allowed -j ACCEPT





Tim a écrit :
On Fri, 2007-02-23 at 11:26 +0100, Luc MAIGNAN wrote:

I don't understand how the priority of the rules of iptables is set.

My problem : I want to allow ssh from my local network(1), and from outside only for an IP(2)

So i Wrote :

(1) : iptables -I INPUT -p tcp -s 192.168.0.0/24 --dport ssh -j ACCEPT
(2) : iptables -I INPUT -p tcp -s ! x.x.x.x --dport ssh -j DROP

The result is that I can ssh only from the ousided IP, not from local network. If I switch the two rules, the result is the same.

Can anyone help me to understand ?


You can have a default drop rule on all input traffic, then add a couple
of specific rules to allow it from your local network, and another to
allow it from a specific address.







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