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VPN Connection Problem - Authentication protocol is not permitted on the remote server

Posted on 2009-04-07
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Last Modified: 2012-05-06
My VPN client access on an SBS 2008 server had been working fine.  Then it began connecting, but not giving me a network IP address&it would give me a 169 APIPA IP address.  Then in trying to fix it, I apparently made it worse.  Now when I try to connect, I get a 649 connection error on the client&The account does not have permission to connect for one of the following reasons&the reason that seems to apply is:
 An authentication protocol may be required that your computer cannot negotiate, or your computer may be attempting to use a protocol that is not authorized by the policy on the remote computer.

On the server I get this error:

The selected authentication protocol is not permitted on the remote server.

The connection could not be established because the authentication method used by your connection profile is not permitted for use by an access policy configured on the RAS/VPN server. Specifically, this could be due to configuration differences between the authentication method selected on the RAS/VPN server and the access policy configured for it.

CoId={NA}: The account for user \jim connected on port VPN2-4 does not have Remote Access privilege.  The line has been disconnected.

>>>

User:
      Security ID:                  S-1-5-21-366816775-4274262072-38412502-1142
      Account Name:            jim
      Account Domain:            DomainName
      Fully Qualified Account Name:      DomainName\jim

Client Machine:
      Security ID:                  S-1-0-0
      Account Name:                  -
      Fully Qualified Account Name:      -
      OS-Version:                  -
      Called Station Identifier:            -
      Calling Station Identifier:            205.172.99.12

NAS:
      NAS IPv4 Address:            192.168.73.1
      NAS IPv6 Address:            -
      NAS Identifier:            VS1
      NAS Port-Type:            Virtual
      NAS Port:                  0

RADIUS Client:
      Client Friendly Name:            VS1
      Client IP Address:            192.168.73.1

Authentication Details:
      Proxy Policy Name:            NAP VPN
      Network Policy Name:            NAP VPN Non NAP-Capable
      Authentication Provider:            Windows
      Authentication Server:            VS1.DomainNameg.local
      Authentication Type:            MS-CHAPv2
      EAP Type:                  -
      Account Session Identifier:      32
      Reason Code:            66
      Reason:                  The user attempted to use an authentication method that is not enabled on the matching network policy.
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Question by:jlstdy
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3 Comments
 
LVL 19

Assisted Solution

by:lamaslany
lamaslany earned 250 total points
ID: 24094689
Can you confirm that you have checked the network policy to ensure that it supports MS-CHAPv2 authentication?  (it should be under the Authentication Methods section of the Constrains tab)

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Author Comment

by:jlstdy
ID: 24099776
Under NPS (Local)  8 Polices (below) are listed.
Three of them have a red x instead of a green check as indicated
The first two do not have MS-CHAPv2 checked, but do have checked "allow clients to connect without negotiating an authentication method"  All of the others have MS-CHAP2v2 checked.


General Connection Authorization Policy

-- TSG Marker Policy {985F7B54-FCE8-4f55-AEBF-DF8827A44068} --  (has red X)

NAP VPN Compliant

NAP VPN Noncompliant

NAP VPN Non NAP-Capable

Virtual Private Network (VPN) Access Policy

Connections to Microsoft Routing and Remote Access server  (has red X)

Connections to other access servers (has red X)
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Accepted Solution

by:
jlstdy earned 0 total points
ID: 24163604
Since I did not get any replies in the past week, I just tried again to fix this VPN access problem and stumbled on a fix.  In NPS > Policies> Connection Request Policies > NAP VPN > Properties > Settings > I check the box for MS-Chap-v2 and I can now connect.  Thanks to lamaslany for giving me somewhat of a clue.
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