Network Solution for Windows – Windows system, Linux system, Ubuntu server configuration tip

we have a similar problem here in our office, the VPN connection was working for 16 days now without any problems. Yesterday we did reboot the router, but we did not change anything and now the VPN connecion just stopped to work. I have to say we had the same problem before and then all of a sudden we could connect through VPN.

I have run the Configure Remote Access Wizard again, but still get the same error message:
Error 800: Unable to establish the VPN connection. The VPN server may be unreachable, or security parameters may not be configured properly for his connection.

Another thing that is really strange, while the VPN connection did work the clients connected to the server without VPN couldn’t open the companyweb, we received an error that the document is not available. Clients connected through VPN could open it without any problem.

In the router the port 1723 is forwarded, so that shouldn’t be the problem. The Server was delivered to us fully configured, the people who delievered the server do not know what the problem is, but it does not seem that we have the ISA Firewall installed. All together only 5 clients connect via VPN (till now) so that shouldn’t be the problem.

Please we really do not know what to do, any help would be very much appreciated.

yes I have the same problem here from a workstation connected to the domain. So you are right, it can’t be a problem of the router, must be something at the server and like I said it worked for 16 days and I haven’t changed anything on the server, just rebooted it yesterday.

many thanks for that very useful information. I have already configured Outlook for the newsgroup and reading the post and really find it helpful.

Regarding my problem, I have done what you suggested, I have run configure remote access and connect to the Internet, but still the same problem. I tried to log on from an internal connected PC, the user has the rights to log on using VPN, but I still get the same error. I have tried it with the Firewall completely disabled during the CEIW, but didn’t help.

I really don’t know what else I could check, the weird thing is that it was working before and we only rebooted the server and since then we have that problem, nothing changed in the server configuration.

sorry for not copying the history of the thread.

Overview of the situation:
- We tried to connect some clients over VPN, but we did receive the following error message: Error 800: Unable to establish the VPN connection. The VPN server may be unreachable, or security parameters may not be configured properly for his connection.
- Then all of a sudden the connection worked, the only thing we did was a reboot of the server
- Now 16 days later we did another reboot and we are back to the same problem Error 800

What I have done:
- We run the configure remote access wizard, VPN access was enabled
- We did run the CEICW, like I mentioned before I have tried it with the Firewall disabled, didn’t work either. So I have enabled it immediately again by running the CEICW again

What I have done now:
- I did run the SBS BPA and I received two critical issues:
1. Three or more network adapter cards are detected.
First two cards are for the LAN and the WAN
The third card we do have installed is a AVM ISDN-Controller FRITZ!Card for the fax

2. Task offloading is enabled

Can any of those problems be the root of the issue we are having?

- Ipconfig /all // Z:\>ipconfig /all // Windows IP Configuration

Host Name . . . . . . . . . . . . : uchoshi
Primary Dns Suffix . . . . . . . : DDT.local
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes
DNS Suffix Search List. . . . . . : DDT.local

Ethernet adapter DMZ:

Connection-specific DNS Suffix

Description . . . . . . . . . . . : Realtek RTL8139 Family PCI Fast Ethern
NIC
Physical Address. . . . . . . . . : 00-02-44-BA-C6-7F
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.11
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.16.2
NetBIOS over Tcpip. . . . . . . . : Disabled

Ethernet adapter Server Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP NC320i PCIe Gigabit Server Adapter
Physical Address. . . . . . . . . : 00-1B-78-39-9D-41
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.16.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 192.168.16.2
Primary WINS Server . . . . . . . : 192.168.16.2

Thanks for all your help, I really do appreciate it.