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Date:      Fri, 21 Feb 2003 10:13:31 -0800
From:      David Cramblett <david@axisintegrated.com>
To:        "FreeBSD-Questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject:   Re: gif tunnels?
Message-ID:  <3E566C4B.8090801@axisintegrated.com>
In-Reply-To: <AMEMKJNMFLJCJDLFIEDBEEDOCHAA.aburke@nullplusone.com>
References:  <AMEMKJNMFLJCJDLFIEDBEEDOCHAA.aburke@nullplusone.com>

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I have a similar configuration, what are your internal router/firewall ip's?

 From your diagram, I would think something like 10.1.0.1 and 10.2.0.1 ??

so where you have:

# ifconfig gif0 inet 10.255.255.1 10.255.255.2 netmask 255.255.255.252

My config would have:

# ifconfig gif0 10.1.0.1 10.2.0.1 netmask 0xffffffff

Hope that helps, I run VPN tunnels to two separate boxes with similar 
configurations, forming kinda of a triangle VPN if you will.

David

Aaron Burke wrote:
>>-----Original Message-----
>>From: owner-freebsd-questions@FreeBSD.ORG
>>[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of
>>Krassimir Slavchev
>>Sent: Friday, February 21, 2003 12:21 AM
>>To: questions@FreeBSD.ORG
>>Subject: gif tunnels?
>>
>>
>>Hello All,
>>
>>I have:
>>
>> Private Net 1      Firewall 1        Firewall 2      Private Net 2
>>---------------    ------------      ------------    ---------------
>>| 10.1.0.0/24 |----| FBSD 4.7 |--//--| FBSD 4.7 |----| 10.2.0.0/24 |
>>---------------    ------------      ------------    ---------------
>>                        |______tunnel______|
>>
>>I want to configure tunnel between "Private Net 1" and "Private Net 2"
>>and
>>can not get tunnel to work when Public IP of "Firewall 1" and "Firewall
>>2" are
>>from same subnet. If public IPs of my firewalls are from different
>>subnets all works fine.
>>
>>On "Firewall 1" I do:
>># ifconfig gif0 create
>># gifconfig gif0 x.y.z.1 x.y.z.2
>># ifconfig gif0 inet 10.255.255.1 10.255.255.2 netmask 255.255.255.252
>># route add -net 10.2.0.0/24 10.255.255.2
>>
>>On "Firewall 2" I do:
>># ifconfig gif0 create
>># gifconfig gif0 x.y.z.2 x.y.z.1
>># ifconfig gif0 inet 10.255.255.2 10.255.255.1 netmask 255.255.255.252
>># route add -net 10.1.0.0/24 10.255.255.1
>>
>>Is there any way to get this to work?
> 
> 
> You may want to check out http://www.nullplusone.com/vpn .It describes
> a slightly different situation. Here there is a link from the 192.168.0.0/24
> to 10.1.1.0/24.
> 
> 
>>Thanks in advance
> 
> Hope this site is some help
> 
> 
> 
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-- 
David Cramblett



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