VBScript: Remote Desktop Disconnected "An Internal Error has occured"

I assume the dropped connection is over the internet? Is it stable when connecting over a LAN?

MTU is an excellent place to start, but I would lower it substantially more than that. 1492 is the minimum for a PPPoE connection, IPSec is 1470, and PPTP 1430, so those are just standards. Drop it to 1260, just for testing purposes, especially on the connecting machine. If stability improves you know you are on the right tack and then you can begin to tweak.

Have you checked all idle session limits?
1) Domain group policy Computer configuration | Administrative templates | Windows components | Terminal Services | Sessions |....
2) Domain group policy User configuration | Administrative templates | Windows components | Terminal Services | Sessions |....
3) Local computer policy Computer configuration | Administrative templates | Windows components | Terminal Services | Sessions |....
4) Local computer policy User configuration | Administrative templates | Windows components | Terminal Services | Sessions |....
5) Users profile in Active Directory. See: Active Directory Users and Computers | User profile | Sessions
6) If a terminal server, see also: on the terminal server, Terminal Services Configuration console | Connections | right click on RDP-Tcp in the right hand window and choose properties | Sessions |&.

I have check the idle session limits and we are still having issues.

We also upgraded the firmware on the router, and dropped the mtu to 1260.

I tested the RWW from inside the company's domain and i can stay connected to the user's pc, but if your outside the domain it will drop once idle still.

You mention an MTU of 1492. That is the standard for PPPoE connections,. Do you have a PPPoE ISP connection?
If so they usually have an idle timeout option within the Modem or router configuration. Setting this to '0' disables the timeout, or there may be a "keep alive" option. Perhaps it is related to that. You wouldn't see the time out from the LAN side with Internet browsing as it instantly reconnect, but that would not be the case from the WAN/public side.

There is not an idle timeout option on the router. We are using a Netgear ProSafe VPN FVS114.

The FVS114 router does have an idle time out option. It is on the "basic setup" page, but only present if you have a PPPoE connection. Do you?

We are not using PPPoE

Sorry, I don't have any other suggestions, perhaps others will. I have noticed a few questions lately where the users say their connections are dropping after 5 minutes, though no solutions have been provided to date.

We are going to purchase a new vpn router and see if that helps. Do you have any suggestions?

Thanks for all the help. We ended up replacing the routers and everything works.

Glad to hear you were able to resolve one way or another.
Thanks corcent.
Cheers !
--Rob