Date: Fri, 17 May 2002 12:22:32 +0200 From: Barry Irwin <bvi@itouchlabs.com> To: Matthew Zahorik <matt@hottub.org> Cc: freebsd-net@freebsd.org Subject: Re: IPsec and dynamically assigned IPs Message-ID: <20020517122232.A28402@itouchlabs.com> In-Reply-To: <Pine.GSO.4.40.0205160858030.10618-100000@hottub>; from matt@hottub.org on Thu, May 16, 2002 at 09:30:58AM -0700 References: <Pine.GSO.4.40.0205160858030.10618-100000@hottub>
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On Thu 2002-05-16 (09:30), Matthew Zahorik wrote:
> I am unclear regarding spdadd arguments and my VPN setup.
>
> I'm attempting to replace Nortel's Contivity Extranet Client on Windows
> with a racoon/ipsec solution.
>
> I'm unsure if this is a "tunnel" or "transport" connection.
>
> I contact a fixed server at 205.173.93.x. This is a contivity switch.
> My client is an IP address assigned by RoadRunner.
>
> During IKE (user w/ SecureID hard token, aggressive mode) another IP
> address is assigned (3.179.89.x) by the contivity.
>
> How do I express this in spdadd so that I can fire off racoon?
>
>
> [client] 66.67.157.x (RoadRunner IP, dynamic, known at spdadd time)
> |
> [tunnel? endpoint] 3.179.89.x (dynamic, assigned during/after IKE)
> |
> { Internet }
> |
> [tunnel? endpoint] ?.?.?.? (fixed, traceroute shows 3.179.68.x 1st hop)
> |
> [server] 205.173.93.x (fixed, known at spdadd time)
If it is two endpoints talking directly then its transport mode
Tunnel would be somethign along the lines of:
A [client] -[vpn gw] - {internet} - [vpngw] - [server]
or
B [client] - {internet} - [vpngw] - [server]
In case A, the client and server are completely unaware of the fact there is
IPSEC involved, as all the work is performed by the gateways.
in case B the client tunnels traffic destined for server to the vpngw where
it is decapsulated adn passed onto the server.
On the case of dynamic IP's have a look at the "generate policy on;"
statement in racoon.conf. However you either need to authenticte using
aggressive mode ( in which case you can provide a username or somethign else
to look up against the password) or main mode using certificates.
On another point, I spent a couple of days hacking around with the Nortel
Client and didnt have much success :< would be great to hear if you do
Barry
--
Barry Irwin bvi@itouchlabs.com +27214875177
Systems Administrator: Networks And Security
Itouch Labs http://www.itouchlabs.com South Africa
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