RE: PIX to PIX VPN from within a private network.

["Utz, Ralph" <rutz () realtime-it com>]

Your best bet would be to have your ISP configure your internet router
for pass through. IE. Your PIX will get the public IP address. As it
stands now, you're not gonna be able to setup that vpn unless you can
configure that internet modem and get a little lucky. 

-----Original Message-----
From: firewall-wizards-admin () honor icsalabs com
[mailto:firewall-wizards-admin () honor icsalabs com] On Behalf Of Greg
Sent: Monday, March 13, 2006 5:03 PM
To: firewall-wizards () honor icsalabs com
Subject: [fw-wiz] PIX to PIX VPN from within a private network.

Hello,

    I have a PIX at home and would like to connect via site to site VPN
to the PIX at work which I also maintain.

The problem I think I may run into is I have a private network  between 
the internet router and my internal home PIX.  The segment between the 
internet router and the internal PIX is 10.0.0.0/24,   the outside 
interface of the PIX is numbered 10.0.0.1.


I'll try my hand at drawing this out:


WORK:   INTERNAL-NET(10.31.0.0/16) >> PIX(NAT) >> INTERNET

HOME: INTERNAL-NET(216.138.246.208/27) >>
(inside int 216.138.246.209)PIX(outside int 10.0.0.2)  >>
(10.0.0.1)Cisco827dsl(216.138.247.130) >> INTERNET

or in simple:

INTERNAL-HOME-NETW(internet routable) >> ROUTER >> PIX >> INTERNET


Can I set up a site to site vpn,  apply the config to the external 
interface of the pix(10.0.0.1) and be able to connect work's PIX without

issues (due to the fact 10.0.0.1 would not be routeable on the
internet)?

I hope I'm being clear in what I'm after.  I envision the PIX at work 
trying to connect back to 10.0.0.1.



thanks in advance,

greg



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