From: "Taylor, Grant" <gtaylor@riverviewtech.net>
To: netfilter@lists.netfilter.org
Subject: Re: Blocking ip addresses..
Date: Fri, 20 May 2005 14:07:18 -0500 [thread overview]
Message-ID: <428E3566.90705@riverviewtech.net> (raw)
In-Reply-To: <20050520172641.GF9921@gw.home.tux-labor.de>
> The Problem is, when I use the conntrack modul, and I block a IP with
> this command :
>
> iptables -t nat -I POSTROUTING -p tcp -s 192.168.0.23 --dport 25 -m
> conntrack --ctstate ESTABLISHED,NEW,RELATED -j DROP,
>
> then I can't create new Connections, but I can use further on the established
> connections.
This problem has to do with the fact that the nat table is only traversed when establishing NEW connections from what I have been told. I think this would be better done in the filter:FORWARD or the filter:OUTPUT table as such:
iptables -t filter -I FORWARD -s 192.168.0.23 -p tcp --dport 25 -j DROP
iptables -t filter -I OUTPUT -s 192.168.0.23 -p tcp --dport 25 -j DROP
Grant. . . .
prev parent reply other threads:[~2005-05-20 19:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-20 17:26 Blocking ip addresses Sebastian Docktor
2005-05-20 19:07 ` Taylor, Grant [this message]
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