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

We are having issues with our RWW dropping the connection. We are using SBS 2003 with SP2. You can log into the workstation but as soon as you minimize the session or leave it idle for a few min it comes up with the error VBScript: Remote Desktop Disconnected "An Internal Error has occured".

I have port 4125 open on the router

The nic driver on the server is the latest version.

I changed the MTU from 1492 to 1472.

We have been working on this issue for a while now and are getting nowhere. Your help is appreciated.
corcentAsked:
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Rob WilliamsCommented:
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 |&.
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corcentAuthor Commented:
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.
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Rob WilliamsCommented:
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.
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corcentAuthor Commented:
There is not an idle timeout option on the router. We are using a Netgear ProSafe VPN FVS114.
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Rob WilliamsCommented:
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?
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corcentAuthor Commented:

We are not using PPPoE
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Rob WilliamsCommented:
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.
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corcentAuthor Commented:
We are going to purchase a new vpn router and see if that helps. Do you have any suggestions?
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Rob WilliamsCommented:
Cisco ASA5500 series would be my first choice by far.
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/product_data_sheet0900aecd802930c5.html
With SBS you have less than 75 users so an ASA5505
would be ideal.
http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/prod_brochure0900aecd80402e36.html
The cost depends on the number of users, but as a guide for the 50 user license they run about $500 US or a little less. The ASA5505's are limited to 10 simultaneous client VPN connections. You can have as many mobile users as you like, but only 10 at a time.

Linksys has a very stable RV042 VPN router. It runs about $200 with no user limits and I believe 30 VPN users. Site to site (2 VPN routers) it works extremely well. Using their IPSec VPN client can be problematic, but you can also use the Windows PPTP client but it may be limited to 5 simultaneous connections.

Netgear has the FVS318 which also works well, about $150. There are no user limits, but you have to pay $50 per license for VPN clients.

Then you can always use the built-in SBS VPN, and any router that supports PPTP pass-through.
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corcentAuthor Commented:
Thanks for all the help. We ended up replacing the routers and everything works.
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Rob WilliamsCommented:
Glad to hear you were able to resolve one way or another.
Thanks corcent.
Cheers !
--Rob
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