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Date:      Wed, 05 Feb 2003 13:34:29 -0500
From:      Bill Moran <wmoran@potentialtech.com>
To:        Marcel Stangenberger <marcel@hayholt.org>
Cc:        Philip Hallstrom <philip@adhesivemedia.com>, questions@FreeBSD.ORG
Subject:   Re: building a VPN with FreeBSD 4.7p3
Message-ID:  <3E415935.6030207@potentialtech.com>
References:  <20030204080406.Q23132-100000@cypress.adhesivemedia.com> <20030204214707.X52428@eldar.hayholt.org> <3E40466E.3000906@potentialtech.com> <20030205125500.A53666@eldar.hayholt.org> <3E414446.3060500@potentialtech.com> <20030205192845.W565@eldar.hayholt.org>

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Marcel Stangenberger wrote:
>>>I've read the website and i figured that vtun is for binding two networks
>>>together. The problems that i have is that:
>>>
>>>1. My FreeBSD internal system is not doing routing/nat, it has only one
>>>   interface with an RFC1918 IP on it. The router is an Allied Data 810.
>>>2. My FreeBSD webserver doesn't have an inside interface, only an outside.
>>
>>Neither of these points prevents you from using vtun.  Nor does either of
>>them make it any more difficult to use, really.  Actually, they're both
>>good reasons to use vtun.
>>
>>Just set up your webserver as the vtun 'server' and the MySQL server as the
>>vtun 'client'.  Make sure to use TCP (not UDP) and things will work just
>>fine.
> 
> hmm, ok, i'll give that a try.
> 
>>>I Hope this makes it a bit clearer, or you be able to tell me where i'm
>>>wrong in this.
>>
>>I'm not sure exactly _where_ you're wrong, but you are.  It can be done,
>>quite easily in fact.
>>
>>What about your setup makes you believe that vtun can't create the connection
>>you want?
> 
> that fact that all examples that i've seen are using NAT and linking
> multiple networks. That's not what i'm trying to do.

Well, nat is definately not a requirement for a vtun, it's just that it's
such a common scenerio that it gets lots of howtos written about it.

And I would bet that (if you're using RFC-1918 addys as you say) that you
really _are_ using nat.  It's just not FreeBSD that's doing it, it's probably
the router in your diagram that has built-in nat capabilities.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com


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