RE: Isa2k4 and IPSec VPN to Cisco Router
- From: "Paul Crisp" <pcrisp@xxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Mon, 7 Feb 2005 14:26:30 -0000
[isalist] RE: Isa2k4 and IPSec VPN to Cisco RouterDoh !
Brain just clicked into gear..........................
Our internal routers won't know anything about stuff on the end of the IPSec
VPN so it makes sense to have the default gateway as the ISA server as this
does, and this will also know about the internal setup as well (hope i'm
correct on that)
The other end of the IPSec VPN is a third party, its not another office or
subsidiary or anything.
Right, i think i've got things now, now some playing with default gateways
Paul
----- Original Message -----
From: Paul Crisp
To: [ISAserver.org Discussion List]
Sent: Monday, February 07, 2005 2:19 PM
Subject: [isalist] RE: Isa2k4 and IPSec VPN to Cisco Router
http://www.ISAserver.org
thanks for the reply Jim.
I have looked at the complex network setup and ours config is even more
complex !!
At the moment, i'm trying to ping from a client that is on the same subnet as
one of our ISA firewalls (this is the one that i am testing ipsec on).
Basically we have three offices all with leased line connections to them to
give a triangulated setup.
From there, two of the offces have 1x leased line connection (each office) to
our ISP. At the moment, the office that i'm located in we have ISA 2000 and in
the other office we have ISA 2000 on the live network and ISA 2004 on our
testing network. Between the offices we have routers (obviously) and each
offices clients default gateway is setup to be the router as we have a lot of
cross traffic.
Where ISA 2004 is (office A) i want to be able to ping from client in office
A across the IPSec VPN to the remote locations internal machines.
Are you saying that i would have to switch all of my clients to point to
their local ISA server as a default gateway for any of this to work ?
Paul
----- Original Message -----
From: Jim Harrison
To: [ISAserver.org Discussion List]
Sent: Monday, February 07, 2005 2:00 PM
Subject: [isalist] RE: Isa2k4 and IPSec VPN to Cisco Router
http://www.ISAserver.org
This is expected.
If your "remote" WAN hosts don't use ISA as their default gateway, they
can't get across the WAN.
Take a look at this article:
http://isaserver.org/tutorials/Designing_An_ISA_Server_Solution_on_a_Com
plex_Network.html
-----Original Message-----
From: Paul Crisp [mailto:PCrisp@xxxxxxxxxxxxxxxxx]
Sent: Monday, February 07, 2005 3:28 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Isa2k4 and IPSec VPN to Cisco Router
http://www.ISAserver.org
Wonder if anyone could help me.
I have followed the excellent documentation produced by ClintD @
Microsoft :
http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/ipsecvpn.mspx
<http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/ipsecvpn.msp
x> and the IPSec VPN is working correctly between the ISA server and
the Cisco PIX box.
I have confirmed that I can ping machines in the remote private network
from our OWA box that is reverse published. I have just tried to ping
from a regular workstation and this fails, however if I change the
default gateway of the workstation to be the ISA server the ping works
successfully.
To explain more, we have 3 subnets covering 3 offices, so at the moment
our workstations are configured for a router which goes to the other two
offices.
Can anyone help me at all?
Paul Crisp
Snr Network Support Analyst
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