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Error 800: Unable to establish vpn connection

degoodwin
degoodwin asked
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Last Modified: 2012-05-07
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.

 
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Commented:
Try the following link which has troubleshooting steps for error 800

http://technet.microsoft.com/en-us/library/cc772616(WS.10).aspx#BKMK_1
Are you telnet'n from outside of the local network? Is port 1723 forwarded on the router's NAT firewall?

If not you will neet to connect to the routers config page from the server (type http://<router ip address), whilst in a remote session to the server.

From there you will need to configure the firewall to forward port 1723 to the servers IP address.

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Commented:
PRoblem was an update to AVG 8.5 reset the firewall on all 3 reomte computers and they blocked the vpn access. reset the pots and it worked.
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