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Date:      Mon, 6 Sep 1999 10:03:12 +0300
From:      Ruslan Ermilov <ru@ucb.crimea.ua>
To:        john holland <johnbsd@yahoo.com>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Cable modem 2-interface setup with natd?
Message-ID:  <19990906100312.B11485@relay.ucb.crimea.ua>
In-Reply-To: <19990905001429.400.rocketmail@web601.yahoomail.com>; from john holland on Sat, Sep 04, 1999 at 05:14:29PM -0700
References:  <19990905001429.400.rocketmail@web601.yahoomail.com>

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On Sat, Sep 04, 1999 at 05:14:29PM -0700, john holland wrote:
> After a bout with DSL that didn't go very well
> (unreliable) I decided to try cable modem again as a
> way to the Net. It's gotten cheaper and works well for
> one computer. 
> 
> Their setup is a bit odd- I'm told that it's because
> they can't receive data on the cable (coax). So you
> have to use a modem to dial in, but returning data
> comes through the cable modem.
> 
> They don't tell you what they're up to, but you set up
> a NIC at 10.0.0.1 to talk to the cable modem, and the
> telephone modem does the usual PPP stuff. So what I
> want is to natd this access to other computers, and
> had planned to do so on 192.168.1.1. But my computer
> on 192.168.1.2 can't get through!
> 
> my interfaces look like this:
> 
> default            24.239.16.8        UGSc       26   
>    18     tun0
> 10                 link#3             UC          0   
>     0      ep0
> 10.0.0.1           localhost          UGHS        0   
>     0      lo0
> 10.0.0.14          0:a0:73:13:8a:60   UHLW        1   
>     2      ep0    894
> 24.239.16.8        n06h3097.ex-pressn UH         27   
>     0     tun0
> localhost          localhost          UH          2   
>     1      lo0
> 192.168.1          link#1             UC          0   
>     0      ed1
> 192.168.1.1        localhost          UGHS        0   
>     0      lo0
> 
> 
> I suspect I need to do something tricky with the natd
> options, ie NOT just divert all from any to any via
> tun0 or ep0, but possibly inport and outport settings
> as well.
> 
> Any help would be appreciated.

Nothing tricky.  First, make sure you have gateway_enable="YES" in your
/etc/rc.conf.  If it is not, then this is obviously your problem.  Then
use natd(8) as usual.  Or, better yet, use `-alias' option of ppp(8);
it's better suited for ppp's operation than natd(8), and doesn't require
you to compile divert(4) and ipfirewall(4) support into your kernel.


-- 
Ruslan Ermilov		Sysadmin and DBA of the
ru@ucb.crimea.ua	United Commercial Bank,
ru@FreeBSD.org		FreeBSD committer,
+380.652.247.647	Simferopol, Ukraine

http://www.FreeBSD.org	The Power To Serve
http://www.oracle.com	Enabling The Information Age


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