Unless the user has the correct/valid VPN credentials they will not be able to establish a connection. This is the idea of a VPN connection that non-authorized users are blocked and authorized users are permitted access. Unless the user is coming from the same IP address, there is little you can do to block access to those attempting to connect to your VPN.
Last Wiki Answer Submitted: September 22, 2009 2:42 pm by Labnuke9932,630 pts.
All Answer Wiki Contributors: Labnuke9932,630 pts.
If you live outside the United States, by submitting your email address you consent to having your personal data transferred to and processed in the United States.
Everyone deals with this all the time. If it becomes a big enough issue you can work with your ISP to block that IP.