RE: RRAS and vpn
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Sun, 29 Jun 2003 22:42:07 -0500
Hi Stefaan,
I checked it out tonight, and you can publish the L2TP/IPSec VPN Server
using Server Publishing rules with a back to back DMZ setup with
ISA2000/Win2003 in the front and back.
HOWEVER -- there is one service that must be disabled on the upstream
ISA2000/Win2003 server in order for this to work. I'll award you, (or
anyone else), 5 social credits for coming up with the name of that
service in Win2003.
Thanks!
Tom
Thomas W Shinder
www.isaserver.org/shinder <http://www.isaserver.org/shinder>
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp
<http://tinyurl.com/1llp>
-----Original Message-----
From: Stefaan Pouseele [mailto:stefaan.pouseele@xxxxxxx]
Sent: Sunday, June 29, 2003 4:08 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: RRAS and vpn
http://www.ISAserver.org
Hi Greg,
as far a I know you can't publish a Windows 2000 VPN server
because PPTP and L2TP/IPSec uses non-TCP/UDP based protocols (IP
protocol 47 and 50 respectively). However, a Windows 2003 VPN server
supports L2TP/IPSec with NAT Traversal and that feature encapsulates the
ESP (IP protocol 50) packets in a UDP packet. Therefore, the ISA server
will only see UDP traffic (UDP port 500 for the IKE and UDP port 4500
for the encapsulated ESP) and that can be published.
For more info about the IPSec NAT Traversal, check out my
article http://www.isaserver.org/articles/IPSec_Passthrough.html .
HTH,
Stefaan
-----Original Message-----
From: Greg Mulholland [mailto:greg_mul@xxxxxxxxxxxxxxx]
Sent: zondag 29 juni 2003 13:43
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: RRAS and vpn
http://www.ISAserver.org
I think I found the answer. ISA does not support gre
passing.
Ironically it was in "GG" and most of the worthy posts I
read were from one Thomas Shinder and one Jim Harrison. You guys rock!
Greg Mulholland
Tech Services Manager
Harvey Norman
+613 98019333
greg_mul@xxxxxxxxxxxxxxx
_____
From: Greg Mulholland [mailto:greg_mul@xxxxxxxxxxxxxxx]
Sent: Sunday, June 29, 2003 9:20 PM
To: [ISAserver.org Discussion List]
http://www.ISAserver.org
Hi guys
Wonder if anyone can shed some light on the
possibilities of running an rras server for vpns behind the isa machine.
This is not my flavor of choice but I am researching a scenario in my
head. I can find little material that is relevant to my question and I
suspect Tom will be able to answer it in a flash but, if anyone else is
awake and knows the limitations I would appreciate it.
Thanks
Greg Mulholland
Tech Services Manager
Harvey Norman
+613 98019333
greg_mul@xxxxxxxxxxxxxxx
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