From: Anders Fugmann <afu@fugmann.dhs.org>
To: Scott Ainslie <scott_ainslie@hotmail.com>
Cc: netfilter@lists.netfilter.org
Subject: Re: PREROUTING exclude
Date: Thu, 05 Sep 2002 15:09:06 +0200 [thread overview]
Message-ID: <3D775772.60604@fugmann.dhs.org> (raw)
In-Reply-To: F16XvpFVjCRGryWtIIZ000009c9@hotmail.com
Scott Ainslie wrote:
> I want the following rule to work for all machines on my subnet except
> for 192.168.0.4. How do I exclude this single machine from this rule?
>
> /sbin/iptables -t nat -A PREROUTING -i eth0 -p tcp \
> -s 192.168.0.0/24 \
> -d 0/0 --dport 80 \
> -j DNAT --to 192.168.0.4:3128
>
The general "all but some" case, can be done by making a new chain, and
implement fall-through in this chain.
Given the above example you could do:
iptables -t nat -N DNAT_INT
iptables -t nat -A DNAT_INT -s 192.168.0.4 -j RETURN
iptables -t nat -A DNAT_INT -j DNAT --to 192.168.0.4:3128
iptables -t nat -A PREROUTING -s 192.168.0.0/24 --dport 80 -J DNAT_INT
Or somthing in the likes of that. (I removed the -d 0/0, since its
redundant = default, and I would also suggest adding and interface
constraint, just to be sure).
Regards
Anders Fugmann
--
Author of FIAIF
FIAIF Is An Intelligent Firewall
http://fiaif.fugmann.dhs.org
prev parent reply other threads:[~2002-09-05 13:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-05 12:50 PREROUTING exclude Scott Ainslie
2002-09-05 13:01 ` Antony Stone
2002-09-05 13:09 ` Anders Fugmann [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3D775772.60604@fugmann.dhs.org \
--to=afu@fugmann.dhs.org \
--cc=netfilter@lists.netfilter.org \
--cc=scott_ainslie@hotmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.