PPTP VPN Error 800

Resolutions:

  1. if you have firewall, open TCP Port 1723, IP Protocol 47 (GRE).
  2. make sure you can reach the VPN server by using ping. Sometimes, poor connection can cause this issue too.
  3. You may need to updated firmware on a router or firewall if other OS (win9x/nt/me/w2k) works except XP.
  4. 4) The VPN server may not be able to get IP from DHCP for the VPN client.
  5. Make sure no other secure software blocks your access, for example, if you use Norton secure software, you may need to add the remote client's IP so that the client can access.
  6. If you can establish the VPN from the desktop at home but not from the laptop. Make sure no security software like Microsoft OneCare software that blocks the GRE.

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