Can't figure this out

From: Santiago (mafal2_at_yahoo.com)
Date: 01/29/04 

Date: 28 Jan 2004 20:59:21 -0800

I have the following network configuration:

ISP1 ISP2 ISP3
  | | |
  | | |
 +----------+ VPN LINK +----------+
 | LINUX1 |------------------------| LINUX2 |
 +----------+ +----------+
      | |
      | |
---------------- ----------------
MASQed NETWORK 1 MASQed NETWORK 2

I have LINUX1 load balancing internet traffic coming from "MASQed
NETWORK 1" and that's working fine. The services LINUX1 has visible to
the internet route packets thru the incoming interfase as specified in
the adv-routing-howto. I can also route to "MASQed NETWORK 2" (without
making any NAT).

The thing I want to be able to do is to route outgoing data from
connections coming from the ISP3 IP address to "MASQed NETWORK 1" thru
the VPN LINK and then thru ISP3 to the destination host. Since
VPN-Link is not NATed I can't figure out how to solve it.

Any ideas?

Thanks in advanced.

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