From: Payal Rathod <payal-iptables@staticky.com>
To: "Vishwanatn T. K." <tkvishy@yahoo.com>
Cc: netfilter@lists.netfilter.org
Subject: Re: FORWARD rules
Date: Fri, 12 Sep 2003 15:39:57 +0530 [thread overview]
Message-ID: <20030912100957.GA3360@linux.local> (raw)
In-Reply-To: <1063260568.26703.1.camel@risingsun.penguindia.com>
On Thu, Sep 11, 2003 at 06:09:29AM +0000, Vishwanatn T. K. wrote:
> > $IPTABLES -A FORWARD -s 125.125.125.0/32 -p tcp -m tcp --dport 110 -j ACCEPT
> > $IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
> >
> > What more do I add to allow natting as well as a secure FORWARD policy?
> > Is the position of ESTABLISHED rule ok?
> >
>
> You need to add NEW state in the above FORWARD rule for this to work.
>
> $IPTABLES -A FORWARD -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
Just confirming this from all. Please check whether this is ok.
$IPTABLES -I PREROUTING -t nat -p tcp -d 202.x.x.x -j DNAT --to 125.125.125.2
$IPTABLES -A INPUT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A FORWARD -s 125.125.125.0/32 -p tcp -m tcp --dport 53 -j ACCEPT
$IPTABLES -A FORWARD -s 125.125.125.0/32 -p udp -m tcp --dport 53 -j ACCEPT
$IPTABLES -A FORWARD -s 125.125.125.0/32 -p tcp -m tcp --dport 80 -j ACCEPT
$IPTABLES -A FORWARD -s 125.125.125.0/32 -p tcp -m tcp --dport 110 -j ACCEPT
echo "1" > /proc/sys/net/ipv4/ip_forward
$IPTABLES -P FORWARD ACCEPT
^^^^^^
$IPTABLES -A INPUT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
Can I now change the ACCEPT statement to DROP without any fear?
Thanks a lot in advance and bye.
With warm regards,
-Payal
--
"Visit GNU/Linux Success Stories"
http://payal.staticky.com
Guest-Book Section Updated.
next prev parent reply other threads:[~2003-09-12 10:09 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-10 17:52 FORWARD rules Payal Rathod
2003-09-10 18:44 ` Ramin Dousti
2003-09-11 2:15 ` netfilter
2003-09-10 18:47 ` Vladimir Potapov
2003-09-11 6:09 ` Vishwanatn T. K.
2003-09-12 10:09 ` Payal Rathod [this message]
2003-09-12 10:45 ` Cedric Blancher
2003-09-12 14:36 ` Arnt Karlsen
2003-09-12 14:51 ` Cedric Blancher
2003-09-12 18:14 ` Arnt Karlsen
2003-09-13 2:26 ` Payal Rathod
2003-09-13 6:42 ` Arnt Karlsen
2003-09-15 7:56 ` Cedric Blancher
2003-09-15 16:32 ` Arnt Karlsen
2003-09-15 17:34 ` Cedric Blancher
2003-09-16 4:28 ` Payal Rathod
2003-09-16 23:31 ` Arnt Karlsen
2003-09-12 10:35 ` Cedric Blancher
-- strict thread matches above, loose matches on Subject: below --
2003-09-16 4:28 Payal Rathod
2003-11-28 19:18 Forward rules Alejandro Cabrera Obed
2003-11-28 20:03 ` Jeffrey Laramie
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