I have an sbs2003 server with 2 NIC's (one wan and one LAN). I am running the standard sbs2003 firewall. VPN was working one day and then failed the next. Rebooting the server does not fix it. Restarting RRAS does not fix it. I always get the same error on my XP workstations when I try to connect in. Error 800: Unable to establish vpn connection. This happens from multiple workstations in multiple locations. I can use RDP and OWA and RWW on the sbs2003 with no problem. I can telnet on port 1723 and get a blinking cursor. If I run netstat -an |find"1723" it responds with
tcp 0.0.0.0:1723 0.0.0.0 listening
But I always get the error 800 now when I try to connect.