netfilter.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Marek Kierdelewicz <marek@piasta.pl>
To: Kurt Wampler <Kurt.Wampler@brion.com>
Cc: netfilter@vger.kernel.org
Subject: Re: How to achieve reverse NETMAP functionality?
Date: Sun, 20 Mar 2011 09:20:32 +0100	[thread overview]
Message-ID: <20110320092032.18159dbd@catus> (raw)
In-Reply-To: <20110318164554.G20495@masktools.com>

Hi,

>We have a need to "alias" portions of a customer's internal private IP
>network, because they have an address range which overlaps a private IP
>address range used internally in one of our systems installed at their
>site.  We are trying to avoid having to re-IP either network.

I haven't tried it, but it seems there's stateless nat available as tc
action. You *probably* could try to do dnat on egress (eg. interface
eth0) and snat on ingress (ingress qdisc attached to eth0).

# tc action add action nat help
Usage: ... nat NAT
NAT := DIRECTION OLD NEW
DIRECTION := { ingress | egress }
OLD := PREFIX
NEW := ADDRESS

Best regards,
Marek Kierdelewicz

  parent reply	other threads:[~2011-03-20  8:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-18 23:45 How to achieve reverse NETMAP functionality? Kurt Wampler
2011-03-19  8:20 ` Pandu Poluan
2011-03-20  8:20 ` Marek Kierdelewicz [this message]
2011-03-21 13:36 ` Patrick McHardy

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=20110320092032.18159dbd@catus \
    --to=marek@piasta.pl \
    --cc=Kurt.Wampler@brion.com \
    --cc=netfilter@vger.kernel.org \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).