Why won't my VPN connect?
Solution 1
You can see here a full listing of MS VPN errors:
http://support.microsoft.com/kb/923944
And, to fix this issue, you have to allow "Dial In Access" in Active Directory. It's an error related to permissions. I've been thru that a while ago.
Here is a good "Tuto" about that:
Allowing user dial in permissions:
1.) Open AD
2.) Choose User
3.) Select Properties for that user
4.) Click the 'Dial-In' Tab
5.) Check 'Allow Access" for Remote Access Permission (RAS) aka VPN
**Note: In the future you should really allow them based on a Remote Access Policy but that is outside the scope of your question.
Solution 2
Hopefully this post will solve your problems:
In many cases, VPN error 812 is permission issue or MS-CHAPv2 issue.
"I had this issue with one of our clients, and to resolve this issue, I changed the permission withing AD to allow dial in access, this resolved the issue right away"
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izb
Updated on September 17, 2022Comments
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izb over 1 year
If I try to log on to my company's VPN, Vista simply says that it failed. If I deliberately use the wrong password, then it prompts me for a new one, meaning that it is at least reaching the VPN server and authenticating me.
In the event log, I have the following error logged against RasClient:
The user User-PC\User dialed a connection named xxxx which has failed. The error code returned on failure is 812.
What is error 812, and more importantly, how do I make it go away?
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qroberts over 10 yearsBelieve it or not I dug around Google and couldn't find a proper solution until I came across yours. No idea why the user didn't have access before as all accounts are usually copied from a template on our AD but this did the trick. Thanks!