ipfw3

Tue Jun 23 09:53:05 PDT 2015

what is the result?

line 100 allow all
line 200 nat 1 tcp via xxx

sure it doesnt work

On 23 June 2015 at 21:36, <nans_nans1 at yahoo.de> wrote:

> now i write a small script:
>
> kldload ipfw3_nat
> ipfw3 add allow all
> ipfw3 nat 1 config if bnx1
> ipfw3 add nat 1 tcp via bnx1
>
>
> But nat/firewalling still dont work.
>
> Any more suggestions?
>
>
> --------------------------------------------
> bycn82 <bycn82 at gmail.com> schrieb am Di, 23.6.2015:
>
>  Betreff: Re: ipfw3
>  An: nans_nans1 at yahoo.de
>  CC: "users at dragonflybsd.org" <users at dragonflybsd.org>
>  Datum: Dienstag, 23. Juni, 2015 02:46 Uhr
>
>  you can write
>  a script to load the modules and firewall rules
>  first.
>  On 22 June 2015 at 23:39,
>  <nans_nans1 at yahoo.de>
>  wrote:
>  yes, you are right: There is no
>  traffic out via bnx1.
>
>  It's for a business company. So no teamviewer is
>  possible.
>
>
>
>  Is there anything else what could be wrong, maybe in
>  rc.conf?
>
>  What about natd_enable ?
>
>
>
>  --------------------------------------------
>
>  bycn82 <bycn82 at gmail.com>
>  schrieb am Mo, 22.6.2015:
>
>
>
>   Betreff: Re: ipfw3
>
>   An: nans_nans1 at yahoo.de
>
>   CC: "users at dragonflybsd.org"
>  <users at dragonflybsd.org>
>
>   Datum: Montag, 22. Juni, 2015 17:27 Uhr
>
>
>
>   yes,
>
>   if you are
>
>   using the latest DragonflyBSD source,then you can
>
>   print the NAT records like
>  "ip show nat
>
>   translation" on cisco routers.
>
>   On 22 June 2015 at 23:22,
>
>   <nans_nans1 at yahoo.de>
>
>   wrote:
>
>   That is a
>
>   good question. Is "tcpdump -nettti bnx1" the
>  right
>
>   command to verify this?
>
>
>
>
>
>
>
>   --------------------------------------------
>
>
>
>   bycn82 <bycn82 at gmail.com>
>
>   schrieb am Mo, 22.6.2015:
>
>
>
>
>
>
>
>    Betreff: Re: ipfw3
>
>
>
>    An: nans_nans1 at yahoo.de
>
>
>
>    Datum: Montag, 22. Juni, 2015 17:11 Uhr
>
>
>
>
>
>
>
>    but do you
>
>
>
>    have any traffic go out via bnx1 ?
>
>
>
>    On 22 June 2015 at 23:08,
>
>
>
>    <nans_nans1 at yahoo.de>
>
>
>
>    wrote:
>
>
>
>    ok. i try it on another machine with
>
>
>
>    4.3 and without the options in kernel config. The
>  result
>
>   is
>
>
>
>    the same.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>    Some data:
>
>
>
>
>
>
>
>    Internal NIC: bnx0, 192.168.100.188/24
>
>
>
>
>
>
>
>    External NIC: bnx1, 192.168.10.229/24
>
>
>
>
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>
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>
>
>
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>
>
>
>    rc.conf:
>
>
>
>
>
>
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>    gateway_enable="YES"
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>
>
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>    defaultrouter="192.168.10.200"
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>
>
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>
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>
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>
>
>    Then:
>
>
>
>
>
>
>
>    kldload ipfw3_nat
>
>
>
>
>
>
>
>    ipfw3 nat 1 config if bnx1
>
>
>
>
>
>
>
>    ipfw3 add nat 1 tcp via bnx1
>
>
>
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>
>    The outputs:
>
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>
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>
>    kldstat:
>
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>
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>    kernel
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>    acpi.ko
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>    ehci.ko
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>    xhci.ko
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>    ipfw3_nat.ko
>
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>    ipfw3_basic.ko
>
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>    ipfw3.ko
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>    libalias.ko
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>    ipfw3 show:
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>
>    00100   0   0   nat 1 tcp via bnx1
>
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>
>    65535  699  51067  deny
>
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>    ipfw3 nat show config:
>
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>    ipfw nat 1 config if bnx1
>
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>    Is something wrong?
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>    --------------------------------------------
>
>
>
>
>
>
>
>    bycn82 <bycn82 at gmail.com>
>
>
>
>    schrieb am Mo, 22.6.2015:
>
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>
>
>     Betreff: Re: ipfw3
>
>
>
>
>
>
>
>     An: nans_nans1 at yahoo.de
>
>
>
>
>
>
>
>     CC: "users at dragonflybsd.org"
>
>
>
>    <users at dragonflybsd.org>
>
>
>
>
>
>
>
>     Datum: Montag, 22.
>
>
>
>    Juni, 2015 15:33 Uhr
>
>
>
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>
>
>
>
>
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>     your rules
>
>
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>
>
>     are correct.and you
>
>
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>
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>     don't need to add the
>
>
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>    options in kernel config file,
>
>
>
>
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>     that belongs to IPFW
>
>
>
>
>
>
>
>     please provide
>
>
>
>
>
>
>
>     output of below commands:1.
>
>
>
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>     kldstat2. ipfw3
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>     show3. ipfw3 nat
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>     show config
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>
>
>     On 22 June 2015 at 21:08,
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>
>
>     <nans_nans1 at yahoo.de>
>
>
>
>
>
>
>
>     wrote:
>
>
>
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>
>     Sorry,
>
>
>
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>
>
>     but this dont work.
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>     My external nic is ue0 and my internal nic is em0.
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>     I run 4.3 and a kernel with the following options:
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>     options IPFIREWALL
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>     options IPDIVERT
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>     options IPFIREWALL_DEFAULT_TO_ACCEPT
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>     options IPFIREWALL_VERBOSE
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>     What i do:
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>     In /etc/rc.conf: gateway_enable="YES"
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>     Then:
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>     kldload ipfw3_nat
>
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>     ipfw3 nat 1 config if ue0
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>     ipfw3 add nat 1 tcp via ue0
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>     The result is that NAT don't work.
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>     What is wrong with my configuration? Have i
>  forgotten
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>     something?
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>     --------------------------------------------
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>
>     bycn82 <bycn82 at gmail.com>
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>
>
>     schrieb am Mo, 22.6.2015:
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>      Betreff: Re: ipfw3
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>      An: nans_nans1 at yahoo.de
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>      CC: "users at dragonflybsd.org"
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>     <users at dragonflybsd.org>
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>      Datum: Montag, 22. Juni, 2015 01:47 Uhr
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>      hi,
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>      sorry for
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>      lacking of documentation.
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>      below are
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>      sample steps to use in-kernel NAT with ipfw3.
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>      Step1:  make
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>      sure the ipfw3_nat module was loaded
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>      dev03#kldstat | grep
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>      ipfw3_nat 5    1 0xffffffff83242000
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>      3000     ipfw3_nat.ko
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>      if the modules was not loaded,
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>      then below command to load the kernel module
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>      dev03#kldload
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>      ipfw3_nat
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>      Step2: prepare
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>      NAT config
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>      dev03#ipfw3 nat 1 config
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>      if em0ipfw nat
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>      1 config if em0
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>      which
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>      means it will do MASQUERADE using interface
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>      em0.
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>      Step3: NAT the
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>      traffic.  NAT is just ip translate. so both
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>      direction should go through the same NAT
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>      config.
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>      dev03#ipfw3
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>      add nat 1 tcp via em0
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>      this means both in and out traffic
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>      on interface em0 will be filtered/ translated by
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>   NAT
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>     config
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>      id 1.
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>      hope this helps, please try it and
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>      if you have any question, just let me know, and
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>      if you can help to come up with an tutorial by
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>     rephrasing
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>      this and append with your experience, that would
>  be
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>     very
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>      helpful.
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>      http://www.dragonflybsd.org/docs/ipfw2/
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>      is an wiki, there is a "edit page"
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>      link.
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>      regards,bycn82
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>      On 22 June 2015 at 02:31,
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>      <nans_nans1 at yahoo.de>
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>      wrote:
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>      Can
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>      someone give me detailed/complete instructions
>  how
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>   to
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>      realize simple working nat with ipfw3 (including
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>    rc.conf
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>     and
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>      configuration files).
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>      The informations on these sites turns out to be
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>      https://www.dragonflybsd.org/docs/ipfw2/
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>      http://www.dragonflybsd.org/docs/ipfw2/modules/
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