Currently Being ModeratedFeb 2, 2012 7:11 PM (in response to kristin.)
I can confirm the same problem with L2TP. I don't use, nor did I add PPTP since my access is always local user. Sometimes it would connect, and sometimes not. Mostly it was 1 successful to 15 unsuccessful tries.
I had the same error and did not have PPTP enabled (DSAuth plugin: Failed to retrieve MPPE....blah). I followed the instructions for kb/HT4748 as dacary stated - and I was able to connect with VPN without fail. I think the addition of PPTP to the service may have broken the plugin's ability to grab the encryption keys - and the command line in kb article repairs this policy.
Hope that answers your question or confirms your suspicions.
Edit: - I did not have to do the part about subtracting and adding the Port Forwards in my AirPort - In case you have one.
Message was edited by: louser
Currently Being ModeratedFeb 3, 2012 10:57 AM (in response to dacary)
sorry for my bad English, I am from Germany...
same problem here, but the support document linked by dacary didn't solved the problem.
The strange thing is that I can log into VPN with my local admin account.
So I just can't use the open directory accounts.
Do you have any additional ideas for me?
Every time I try to connect to the server, I get "The PPP server could not be authenticated" :-(
Shall I try to use this command which rebuilds the authentication key?
sudo vpnaddkeyagentuser /LDAPv3/127.0.0.1
Thanks for your help
Currently Being ModeratedFeb 3, 2012 11:02 AM (in response to Samuel.b)
Samuel: What OS is your client machine running? How long (how many charachters) is your shared secret? Are you using "special" characters (!@#$%^&*()'", etc.) in your shared secret?
Currently Being ModeratedFeb 3, 2012 11:07 AM (in response to kristin.)
Kristin: iOs devices run 5.0.1 (iPad and iPhone)
Mac OS X Lion 10.7.3
everything worked before I updated to 10.7.3.
The shared secret has about 20 characters and it also has "special" characters.
Currently Being ModeratedFeb 3, 2012 11:24 AM (in response to kristin.)
I have tried it and it didn't work...
I think it goes together with a open directory problem because the local admin account works fine already with 10.7.3.
Do you think it could be helpful to rebuild the authentication key?
Thanks a lot for your help!
Currently Being ModeratedFeb 3, 2012 12:04 PM (in response to Samuel.b)
Well, Back to my Mac and VPN share some of the same ports, and Back to my Mac takes precedence over VPN. But, the fact that you can log in via a local user and not OD feels like it's something else. But again, the Back to my Mac thing is the only thing I can think of right now?
Currently Being ModeratedFeb 3, 2012 1:08 PM (in response to kristin.)
Yes, Back to my Mac workes. I habe tried it out.
I have also tried to add a new OD account but the new one didn't work, too.
Do I have to restart the VPN Server after I have rebuild the VPN authentication key?
Or do I have to do something else after I have rebuild the key?
Thanks for your help.