From owner-freebsd-questions@FreeBSD.ORG Tue May 3 19:35:17 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4EC5F106568D for ; Tue, 3 May 2011 19:35:17 +0000 (UTC) (envelope-from geoff@apro.com.au) Received: from mail.ricksure.com.au (mail.ricksure.com.au [203.98.89.150]) by mx1.freebsd.org (Postfix) with ESMTP id AC7178FC24 for ; Tue, 3 May 2011 19:35:16 +0000 (UTC) Received: from 171.78.233.220.static.exetel.com.au [220.233.78.171] by mail.ricksure.com.au with SMTP; Wed, 4 May 2011 05:19:53 +1000 From: Geoff Roberts Organization: Australian Projects To: freebsd-questions@freebsd.org Date: Wed, 4 May 2011 05:19:56 +1000 User-Agent: KMail/1.13.5 (Linux/2.6.32-31-generic; KDE/4.4.5; x86_64; ; ) MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <201105040519.56695.geoff@apro.com.au> X-Declude-Sender: geoff@apro.com.au [220.233.78.171] X-Declude-Spoolname: 39770192.eml X-Declude-RefID: X-Declude-Note: Scanned by Declude 4.6.35 "http://www.declude.com/x-note.htm" X-Declude-Scan: Outgoing Score [0] at 05:19:55 on 04 May 2011 X-Declude-Tests: Whitelisted X-Country-Chain: X-Declude-Code: 0 X-Declude-Recipcount: 1 Organization: Declude, Inc. X-Helo: ubuntutest-01.localnet X-RevDNS: Subject: Can I bridge the same subnet across a VPN? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: geoff@apro.com.au List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 May 2011 19:35:17 -0000 Hi, Is it possible to join two sites with the same subnet across a VPN? I have two sites that have the same subnet/mask. I need these two separated networks to behave as one across a VPN. All configuration examples I've come across so far assume that each site will have a different subnet. Eg, one site with 192.168.1.0/24 the other with 192.168.2.0/24 I control the firewalls at each end. One will be a pfsense firewall, the other an existing FreeBSD 7.4 system. For example I would want to be able to do the following: Site A Site B ------ ------ Firewall A 10.1.1.3 --------- Firewall B 10.1.1.4 | | Subnet: 192.168.20.0/24 Subnet: 192.168.20.0/24 Happy to use either IPSec or OpenVPN to actually encrypt the traffic. Kind regards, Geoff