[Openswan Users] Help with WinXP behind NAT as client
tbenson at a-1networks.com
Tue Mar 23 09:03:19 CET 2004
Don't forget to also update the WindowsXP Client with the latest
patch's. One of which is a NAT traversal patch for the Windows XP
client. I am not sure if it helps with anything but the Microsoft VPN
servers, but one client I was trying to get on from behind a Linksys
seemed to be more consistent after patching. Not really sure how the
client side could cause problems with NAT traversal, but I also have no
clue how MS writes their software ;).
From: users-bounces at lists.openswan.org
[mailto:users-bounces at lists.openswan.org] On Behalf Of Leonard Tulipan
Sent: Tuesday, March 23, 2004 7:50 AM
To: users at lists.openswan.org
Subject: [Openswan Users] Help with WinXP behind NAT as client
Sorry if I seem like a total newbie but in a way I am. I come to you for
help, because -frankly- I don't know where else to go.
It's probably some stupid mistake, but please bear with me.
WinXP Box (192.168.0.15)
-> NAT Firewall (linux)
-> NAT Firewall with Freeswan/X509 2.05 (currently updating to
-> 192.168.118.0/24 Network
So my first question: I do need this Nat Traversal patch right? So
that's why I am currently compiling openswan on this machine.
For WinXP I used
and tried Markus Muellers Tools at http://vpn.ebootis.de/ (which didnt't
so I configured the connection in the MMC manually
Pakets definitely arrive at the ipsec Firewall but something still is
in oakley.log on WinXP I see:
3-23: 16:28:31:204:318 Receive: (get) SA = 0x001090b8 from
3-23: 16:28:31:204:318 ISAKMP Header: (V1.0), len = 956
3-23: 16:28:31:204:318 I-COOKIE 9cb3435a6a80ac1a
3-23: 16:28:31:204:318 R-COOKIE fd86d01cf6ea32ca
3-23: 16:28:31:204:318 exchange: Oakley Main Mode
3-23: 16:28:31:204:318 flags: 1 ( encrypted )
3-23: 16:28:31:204:318 next payload: ID
3-23: 16:28:31:204:318 message ID: 00000000
On the Firewall:
Mar 23 16:26:51 firewall pluto: "xp-n2n" ip.of.nat.fw #3: sent
MR3, ISAKMP SA established
Mar 23 16:26:52 firewall pluto: "xp-n2n" ip.of.nat.fw #3:
cannot respond to IPsec SA request because no connection is known for
192.168.118.0/24===ip.of.ipsec.fw[C=AT, L=Wien, O=Schneller
Scharau 5th Mind, CN=VPNusr1]...ip.of.nat.fw[C=AT, L=Wien, O=Schneller
Scharau 5th Mind, CN=VPNusr1]===192.168.0.15/32
Here is my ipsec.conf
# always use certificates
# lokaler Endpunkt (left)
rightid="C=AT, L=Wien, O=Schneller Scharau 5th Mind, CN=VPNusr1"
I'm playing around with the last two entries.
So, is this whole thing because of the missing NAT-T Patch or is there
some major flaw. I'm really not good at this when it comes to having TWO
Firewalls to care about.
Any help is greatly appreciated.
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