Can't establish a PPTP VPN from a Windows client to Windows SBS 2011 Standard through a Juniper SSG5 firewall.
Server registers the connection but it fails on the client side with Error 806.
This works out of the box from the same client on servers with newer firewalls (with 1723 forwarded), but I do have port 1723 forwarded in the firewall and GRE enabled, and can see the server listening on 1723.
Juniper was not helpful, but was able to demonstrate with Wireshark that the client is requesting to close the connection after it is established.
Any known settings needed on Juniper SSG5 to enable this? I should not that no VPN's are configured natively in the Juniper.