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From: dE <de.techno@gmail.com>
To: netfilter@vger.kernel.org
Subject: DROP policy, serious vulnerability?
Date: Thu, 19 Mar 2015 11:21:44 +0530	[thread overview]
Message-ID: <550A63F0.2030400@gmail.com> (raw)

Hi!

I'm using the drop policy for iptables using the following --

iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP
iptables -A INPUT -p tcp -j ACCEPT
iptables -A INPUT -p udp -j ACCEPT
iptables -A INPUT -p tcp ! -i lo -m multiport --dports 0:79,81:65535 -m 
state --state NEW -j DROP

Unfortunately, in this configuration, none of the ports get blocks.

This implies that after an ACCEPT, further rules are not matched. Is 
this a bug or intended by design?

If this is by design, how am I supposed to use modules like connlimit 
with DROP policy.

Thanks for any help!

             reply	other threads:[~2015-03-19  5:51 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-19  5:51 dE [this message]
2015-03-19  6:43 ` DROP policy, serious vulnerability? Neal Murphy
2015-03-19  7:21   ` dE
2015-03-19 11:25 ` André Paulsberg-Csibi
2015-03-19 11:34   ` Noel Kuntze

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