ipfw3

Mon Jun 22 17:46:55 PDT 2015

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
>
>
>
>
>
>
>
>   rc.conf:
>
>
>
>   gateway_enable="YES"
>
>
>
>   defaultrouter="192.168.10.200"
>
>
>
>
>
>
>
>   Then:
>
>
>
>   kldload ipfw3_nat
>
>
>
>   ipfw3 nat 1 config if bnx1
>
>
>
>   ipfw3 add nat 1 tcp via bnx1
>
>
>
>
>
>
>
>   The outputs:
>
>
>
>
>
>
>
>   kldstat:
>
>
>
>
>
>
>
>   kernel
>
>
>
>   acpi.ko
>
>
>
>   ehci.ko
>
>
>
>   xhci.ko
>
>
>
>   ipfw3_nat.ko
>
>
>
>   ipfw3_basic.ko
>
>
>
>   ipfw3.ko
>
>
>
>   libalias.ko
>
>
>
>
>
>
>
>   ipfw3 show:
>
>
>
>
>
>
>
>   00100   0   0   nat 1 tcp via bnx1
>
>
>
>   65535  699  51067  deny
>
>
>
>
>
>
>
>   ipfw3 nat show config:
>
>
>
>   ipfw nat 1 config if bnx1
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>   Is something wrong?
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>   --------------------------------------------
>
>
>
>   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 15:33 Uhr
>
>
>
>
>
>
>
>    your rules
>
>
>
>    are correct.and you
>
>
>
>    don't need to add the
>
>   options in kernel config file,
>
>
>
>    that belongs to IPFW
>
>
>
>    please provide
>
>
>
>    output of below commands:1.
>
>
>
>    kldstat2. ipfw3
>
>
>
>    show3. ipfw3 nat
>
>
>
>    show config
>
>
>
>    On 22 June 2015 at 21:08,
>
>
>
>    <nans_nans1 at yahoo.de>
>
>
>
>    wrote:
>
>
>
>    Sorry,
>
>
>
>    but this dont work.
>
>
>
>
>
>
>
>    My external nic is ue0 and my internal nic is em0.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>    I run 4.3 and a kernel with the following options:
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>    options IPFIREWALL
>
>
>
>
>
>
>
>    options IPDIVERT
>
>
>
>
>
>
>
>    options IPFIREWALL_DEFAULT_TO_ACCEPT
>
>
>
>
>
>
>
>    options IPFIREWALL_VERBOSE
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>    What i do:
>
>
>
>
>
>
>
>    In /etc/rc.conf: gateway_enable="YES"
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>    Then:
>
>
>
>
>
>
>
>    kldload ipfw3_nat
>
>
>
>
>
>
>
>    ipfw3 nat 1 config if ue0
>
>
>
>
>
>
>
>    ipfw3 add nat 1 tcp via ue0
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>    The result is that NAT don't work.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>    What is wrong with my configuration? Have i forgotten
>
>
>
>    something?
>
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>
>
>    --------------------------------------------
>
>
>
>
>
>
>
>    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 01:47 Uhr
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>     hi,
>
>
>
>
>
>
>
>     sorry for
>
>
>
>
>
>
>
>     lacking of documentation.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>     below are
>
>
>
>
>
>
>
>     sample steps to use in-kernel NAT with ipfw3.
>
>
>
>
>
>
>
>     Step1:  make
>
>
>
>
>
>
>
>     sure the ipfw3_nat module was loaded
>
>
>
>
>
>
>
>     dev03#kldstat | grep
>
>
>
>
>
>
>
>     ipfw3_nat 5    1 0xffffffff83242000
>
>
>
>
>
>
>
>     3000     ipfw3_nat.ko
>
>
>
>
>
>
>
>     if the modules was not loaded,
>
>
>
>
>
>
>
>     then below command to load the kernel module
>
>
>
>
>
>
>
>     dev03#kldload
>
>
>
>
>
>
>
>     ipfw3_nat
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>     Step2: prepare
>
>
>
>
>
>
>
>     NAT config
>
>
>
>
>
>
>
>     dev03#ipfw3 nat 1 config
>
>
>
>
>
>
>
>     if em0ipfw nat
>
>
>
>
>
>
>
>     1 config if em0
>
>
>
>
>
>
>
>     which
>
>
>
>
>
>
>
>     means it will do MASQUERADE using interface
>
>
>
>
>
>
>
>     em0.
>
>
>
>
>
>
>
>     Step3: NAT the
>
>
>
>
>
>
>
>     traffic.  NAT is just ip translate. so both
>
>
>
>
>
>
>
>     direction should go through the same NAT
>
>
>
>
>
>
>
>     config.
>
>
>
>
>
>
>
>     dev03#ipfw3
>
>
>
>
>
>
>
>     add nat 1 tcp via em0
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>     this means both in and out traffic
>
>
>
>
>
>
>
>     on interface em0 will be filtered/ translated by
>  NAT
>
>
>
>    config
>
>
>
>
>
>
>
>     id 1.
>
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>
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>
>
>
>
>
>
>
>     hope this helps, please try it and
>
>
>
>
>
>
>
>     if you have any question, just let me know, and
>
>
>
>
>
>
>
>     if you can help to come up with an tutorial by
>
>
>
>    rephrasing
>
>
>
>
>
>
>
>     this and append with your experience, that would be
>
>
>
>    very
>
>
>
>
>
>
>
>     helpful.
>
>
>
>
>
>
>
>     http://www.dragonflybsd.org/docs/ipfw2/
>
>
>
>
>
>
>
>     is an wiki, there is a "edit page"
>
>
>
>
>
>
>
>     link.
>
>
>
>
>
>
>
>     regards,bycn82
>
>
>
>
>
>
>
>     On 22 June 2015 at 02:31,
>
>
>
>
>
>
>
>     <nans_nans1 at yahoo.de>
>
>
>
>
>
>
>
>     wrote:
>
>
>
>
>
>
>
>     Can
>
>
>
>
>
>
>
>     someone give me detailed/complete instructions how
>  to
>
>
>
>
>
>
>
>     realize simple working nat with ipfw3 (including
>
>   rc.conf
>
>
>
>    and
>
>
>
>
>
>
>
>     configuration files).
>
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>
>     The informations on these sites turns out to be
>  sadly
>
>
>
>    sparse
>
>
>
>
>
>
>
>     for me:
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>     https://www.dragonflybsd.org/docs/ipfw2/
>
>
>
>
>
>
>
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>
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>
>
>
>
>     http://www.dragonflybsd.org/docs/ipfw2/modules/
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