Re: ISA 2004 error 768

From: NOSPAM (nospam_at_hotmail.com)
Date: 02/07/05 

Date: Mon, 7 Feb 2005 13:44:47 +0100

hi,

1 - issue with VPN from Internet to my Office Site
2 - by mail
Step 1 - Service IPSEC running
Step 2 - PPTP is working; the problem is only with L2TP on the WAN interface
(i can connect with L2TP on my LAN interface)
       - VPN client Microsoft 2000 XO SP1 or SP2
- It's a ISA2004 , not a ISA 2000.

This configuration was ok with ISA 2004 on Windows 2000 server.
But with windows 2003, i have this L2TP problem

thank's for your help

"Rebecca Chen [MSFT]" <v-rebc@online.microsoft.com> a écrit dans le message
de news: NKj9rzNDFHA.2504@cpmsftngxa10.phx.gbl...
> Hello,
>
> I would like to confirm my understanding on this issue.
>
> 1. Do you mean encounter this issue when you VPN from your LAN with ISA
> installed to a remote site or you VPN to a remote site with ISA installed?
>
> 2. Could you take a screen shot of the error message and send it to
> v-rebc@microsoft.com for research.
>
> Based on my research, error 768 has indicted that "The connection attempt
> failed because of failure to encrypt data", which leads me believe this
> issue is related to the data encryption. I suggest you use the following
> steps to check the status.
>
> Step 1:
> ========
> Check to see if policyagent (IPSec service) is started (you can see it by
> "sc query policyagent"). If the service is not running you need to start
> it
> (net start policyagent).
>
> Step 2:
> ==========
> What kind of VPN client do you use? Can you use VPN by using PPTP?
>
> Please refer to the following link to
> http://www.isaserver.org/tutorials/natt2003.html
>
> Create a packet filter for inbound UDP 500 (receive/send)
> Create a packet filter for inbound UDP 4500 (receive/send)
> Create a packet filter for inbound UDP 1701 (receive/send)
>
> NOTE: This response contains a reference to a third party World Wide Web
> site. Microsoft can make no representation concerning the content of these
> sites. Microsoft is providing this information only as a convenience to
> you: this is to inform you that Microsoft has not tested any software or
> information found on these sites and therefore cannot make any
> representations regarding the quality, safety, or suitability of any
> software or information found there. There are inherent dangers in the use
> of any software found on the Internet, and Microsoft cautions you to make
> sure that you completely understand the risk before retrieving any
> software
> on the Internet.
>
> What is the result? If the issue persists, please let me know the details
> of the IP address assignment in your LAN and the client.
>
> Any update, let us get in touch!
>
> Best regards,
>
> Rebecca Chen
>
> MCSE2000 MCDBA CCNA
>
>
> Microsoft Online Partner Support
> Get Secure! - www.microsoft.com/security
>
> =====================================================
>
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> that others may learn and benefit from your issue.
>
> =====================================================
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> rights.
>

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