[Openswan Users] L2TP IPSEC and Windows XP

[André Mendes - WAITS]

Hi people,
 
I am trying to implement L2TP IPSEC and Windows XP. I follow all the article
of Nate Carlson (http://www.natecarlson.com/linux/ipsec-l2tp.php), but
Windows XP couldn´t establish the connection. 
 
I noticed three things, In Windows XP, the machine certificate appear with a
warning, where says that "the certificate authority doesn´t look like to
have permission to issue certificates". 
 
The other thing appear in the /var/log/secure, where has the following
message:
 
"next payload type of ISAKMP Hash Payload has an unknown value:"
 
The thirty thing is the message that Windows XP L2TP Client shows "the
machine don´t have an valid certificate"
 
Anyone has any tips?
 
Thanks,
 
André
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