From: Changli Gao <xiaosuo@gmail.com>
To: sclark46@earthlink.net
Cc: netfilter-devel@vger.kernel.org
Subject: Re: clone packet with new destination address
Date: Fri, 22 Oct 2010 21:36:43 +0800 [thread overview]
Message-ID: <AANLkTi=T3QwJp-yVT3GNk46mjmudQ5CrE71YnMqWfsOh@mail.gmail.com> (raw)
In-Reply-To: <AANLkTi=Y6zdmj4hngEaJPjZjNTTWaWMERfKR=dGSkY9b@mail.gmail.com>
On Fri, Oct 22, 2010 at 9:24 PM, Changli Gao <xiaosuo@gmail.com> wrote:
> On Fri, Oct 22, 2010 at 8:31 PM, Stephen Clark <sclark46@earthlink.net> wrote:
>> Hello,
>>
>> Problem:
>> I have a two monitoring servers behind a a linux firewall, one is primary
>> and one is backup.
>> In the field we have units sending udp informational packet to the primary
>> server. On the
>> linux firewall I would like to copy this packet and change the destination
>> address of the copied
>> packet to point to the backup server. Is there a way to do this without
>> writing any code?
>>
>> NOTE:
>> Currently the firewall is FreeBSD and we accomplish this rather easily using
>> ipfw along with natd, but we want to move to linux for our firewall.
>>
>
> I think you can use tc action mirred to mirror the packets to a fake
> NIC device ifb, and use tc action nat to dnat the packets received
> from ifb.
>
Oh, iptables can also do it. Please see iptables target TEE and RAWNAT
in xtables-addons. http://xtables-addons.sourceforge.net/
--
Regards,
Changli Gao(xiaosuo@gmail.com)
next prev parent reply other threads:[~2010-10-22 13:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-22 12:31 clone packet with new destination address Stephen Clark
2010-10-22 13:24 ` Changli Gao
2010-10-22 13:36 ` Changli Gao [this message]
2010-10-22 14:16 ` Stephen Clark
2010-11-01 12:46 ` Stephen Clark
2010-11-01 13:09 ` Jan Engelhardt
2010-11-01 14:29 ` Stephen Clark
2010-11-01 15:00 ` Changli Gao
2010-11-01 15:02 ` Changli Gao
2010-11-01 15:16 ` Stephen Clark
2010-11-01 19:37 ` Jan Engelhardt
2010-11-01 19:29 ` Jan Engelhardt
2010-11-02 13:44 ` Stephen Clark
2010-11-02 13:46 ` Jan Engelhardt
2010-11-02 13:53 ` Stephen Clark
2010-11-02 22:35 ` Changli Gao
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