PPTP VPN not connecting (Error 800)
Posted September 15th, 2008 by mattshadboltMy users logged a call this morning complaining that they couldn’t connect to the corportate VPN - PPTP running on RAS (Microsoft Small Business Server 2003). I tried to connect and found the same thing.
After restarting the RAS services I started to troubleshoot.
I tried everything from disabling/enabling the Miniport driver to deleting the PPTP config and starting again - all to no avail.
Running the Microsoft Port Query tool (http://support.microsoft.com/default.aspx?scid=kb;en-us;310099) I found that the PPTP port 1723 was “ESTABLISHED” - this should be in “LISTENING” mode. This tells me that there is something running on the 1723 port that shouldn’t be - locking my users out.
I then used another great tool from sysinternals to find the process that was using my PPTP port. The tool is called TCPView and you can download it at http://technet.microsoft.com/en-us/sysinternals/bb897437.aspx. TCPView told me that the connection on port 1723 was established by my SQL server and the exe that was using it was a BlackBerry service. I killed the process, restarted the RAS services and our PPTP VPN was now working.
Tags: BlackBerry, Microsoft Small Business Server, Port Query Tool, PPTP, SBS, TCPView, VPN
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