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Date:      Mon, 1 Jul 2013 14:16:00 +0300
From:      Sami Halabi <sodynet1@gmail.com>
To:        Eugene Grosbein <eugen@grosbein.net>
Cc:        "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, freebsd-ipfw <freebsd-ipfw@freebsd.org>
Subject:   Re: DNAT in freebsd
Message-ID:  <CAEW%2BogZB9m%2B5FLyB2NXFbp=uSpvCq6fn4SPVZe2W58yQ-S_z4w@mail.gmail.com>
In-Reply-To: <51D15D06.9030300@grosbein.net>
References:  <CAEW%2BogYp61U2zjicksYekSdfmLLZh5g9QM3GUg4n16ZbudVZtg@mail.gmail.com> <20130629002959.GB20376@nat.myhome> <CAEW%2BogZ=a6LZavOtcb_egNWFQ8bJP0gzP6pc90tu1dcWC9K80A@mail.gmail.com> <51D006F6.6060809@grosbein.net> <CAEW%2Bogbx15KiayBHFJ7T1YVGQ2pwm1ArQaSrjUk6XUOBgVPggA@mail.gmail.com> <51D04FA8.8080900@grosbein.net> <CAEW%2BogZQ1bHOBNvxkLqnFRrR_b4=e%2BYx9wUjWC8YYr__QsBe3w@mail.gmail.com> <CAEW%2BogZmd4Rz7OgTKV-k=tnSLgG0Y0-4XO%2BxuELznsgVo0XZ%2BA@mail.gmail.com> <51D14930.1060502@grosbein.net> <CAEW%2BogYW9YWZr6TnzqZ%2BHv_e_fFo-MKW1hTdWfw7w=qaCFw3Yg@mail.gmail.com> <51D15D06.9030300@grosbein.net>

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Hi,
I did ping 10.0.1.1 from 10.0.1.2, so packet is 10.0.1.2 ->10.0.1.1
> ipfw add 1000 nat 1 all from 10.0.1.2 to 10.0.1.1
if I have 10.0.1.1 in em1 no translation is done!
if I delete it (and add a static arp entry in 10.0.1.2 for mac of 10.0.1.1)
rule 1000 translates well and I get packet from 11.0.3.1->10.0.1.1

> ipfw add 2000 nat 2 all from 11.0.3.1 to 10.0.1.1
no translation is done at all!

Sami

> ipfw add 3000 nat 2 all from 11.0.4.2 to 11.0.3.1
> ipfw add 4000 nat 1 all from 10.0.1.1 to 11.0.3.1
>
>
> ipfw nat 1 config same_ports ureg_only ip 11.0.3.1
> ipfw nat 1 config reverse same_ports ureg_only ip 11.0.4.2



On Mon, Jul 1, 2013 at 1:42 PM, Eugene Grosbein <eugen@grosbein.net> wrote:

> On 01.07.2013 17:05, Sami Halabi wrote:
> > Hi,
> > forgot to mention that but this sysctl is already set to 0.
> > i see in the logs packets pass 1000 rule.
>
> Use rules like 'ipfw add 1500 count log ip from any to any' to check
> intermediate results of translation.
>
>


-- 
Sami Halabi
Information Systems Engineer
NMS Projects Expert
FreeBSD SysAdmin Expert



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