From: Ralf Spenneberg <lists@spenneberg.org>
To: Michael Robinton <michael@insulin-pumpers.org>
Cc: Netfilter <netfilter@lists.netfilter.org>
Subject: Re: port redirect for local host
Date: 03 Sep 2003 12:54:15 +0200 [thread overview]
Message-ID: <1062586455.18242.3.camel@kermit> (raw)
In-Reply-To: <Pine.LNX.4.33.0309012154390.24379-100000@pandora.is.bizsystems.com>
Am Die, 2003-09-02 um 07.00 schrieb Michael Robinton:
> I have a relatively simple redirect that does not seem to work for the
> local host. I'm running a DNSBL on a virtual IP address on a host that
> already has a DNS daemon running.
>
> entry is...
>
> $IPTABLES -t nat -A PREROUTING -p tcp -d $DNSBL_IP --dport 53 -j REDIRECT
> --to-port $DNSBL_PORT
>
> this works fine from both the network (internet) and from the interfaces
> on the private side. eth1, eth0
>
> I does not work at all from the local host and no amount of tweaking of
> the rule set seems to help.
locally generated packets do not traverse the PREROUTING but the OUTPUT
chain.
Cheers,
Ralf
--
Ralf Spenneberg
RHCE, RHCX
Book: Intrusion Detection für Linux Server http://www.spenneberg.com
IPsec-Howto http://www.ipsec-howto.org
Honeynet Project Mirror: http://honeynet.spenneberg.org
prev parent reply other threads:[~2003-09-03 10:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-02 5:00 port redirect for local host Michael Robinton
2003-09-03 10:54 ` Ralf Spenneberg [this message]
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