Date: Mon, 1 Jul 2013 13:05:25 +0300 From: Sami Halabi <sodynet1@gmail.com> To: Eugene Grosbein <eugen@grosbein.net> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, "Paul A. Procacci" <pprocacci@datapipe.com>, freebsd-ipfw <freebsd-ipfw@freebsd.org> Subject: Re: DNAT in freebsd Message-ID: <CAEW%2BogYW9YWZr6TnzqZ%2BHv_e_fFo-MKW1hTdWfw7w=qaCFw3Yg@mail.gmail.com> In-Reply-To: <51D14930.1060502@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>
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Hi, forgot to mention that but this sysctl is already set to 0. i see in the logs packets pass 1000 rule. Sami On Mon, Jul 1, 2013 at 12:17 PM, Eugene Grosbein <eugen@grosbein.net> wrote: > On 01.07.2013 14:30, Sami Halabi wrote: > > Hi, > > > > I've tried the following: > > > > em1 - ip 10.0.1.1/24 <http://10.0.1.1/24>; > > em2 - ip 11.0.3.1/24 <http://11.0.3.1/24>; > > route add 11.0.4.0/24 <http://11.0.4.0/24>; 11.0.3.2 > > > > ipfw flush > > ipfw add 1000 nat 1 all from 10.0.1.2 to 10.0.1.1 > > ipfw add 2000 nat 2 all from 11.0.3.1 to 10.0.1.1 > > > > 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 > > > > what i see in tcpdump and logs is that the rule 1000 converts the ip > correctly > > 10.0.1.2->10.0.1.1 ==> 11.0.3.1->10.0.1.1 > > while the 2000 rule does nothing... > > man ipfw says: > > To let the packet continue after being (de)aliased, set the sysctl > vari- > able net.inet.ip.fw.one_pass to 0. > > By default, rule 1000 "consumes" aliased packets and they do not hit rule > 2000 at all. > So, you need to set sysctl net.inet.ip.fw.one_pass=0 > -- Sami Halabi Information Systems Engineer NMS Projects Expert FreeBSD SysAdmin Expert
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