Hello, By the latest patches I mean ISA Server 2006 SP1 running on Windows 2003 R2 with the Windows Patches December 31st. There are no events in the application log. There is an Informational event in the system event log: Event Type: Information Event Source: RemoteAccess Event Category: None Event ID: 20180 Date: 1/9/2009 Time: 10:27:15 AM User: N/A Computer: ISA-FIREWALL Description: Interface remoteSite.com is unreachable because the connection attempt failed. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. In addition there are these entries in the router.log file: [1056] 01-09 10:27:15:022: RasConnectionInitiate: To remoteSite.com dwRetCode=600 [7672] 01-09 10:27:15:101: RasGetSubEntryHandle( 0x5d0000, 0x1, 0x404f8e4 ) = 259 [7672] 01-09 10:27:15:101: RasConnectCallback:Could not connect to SubEntry 1,dwError=633 [7672] 01-09 10:27:15:101: RasConnectCallback:Could not connect to interface remoteSite.com [7672] 01-09 10:27:15:101: RasConnectCallback: hanging up 0x5d0000 [7672] 01-09 10:27:15:101: Will mark interface ftdistributing.local as reachable after 7200 seconds [7672] 01-09 10:27:15:101: Notifying Protocol = 0x21,Interface=remoteSite.com is UnReachable=1 Bill From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Harrison Sent: Friday, January 09, 2009 10:06 AM To: isalist@xxxxxxxxxxxxx Subject: [isalist] Re: PPTP Interface not working Any chance you can elaborate on what is included in "the latest patches"? What other errors do you find in the system or application event logs? Jim From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of William T. Holmes Sent: Thursday, January 08, 2009 4:14 PM To: isalist@xxxxxxxxxxxxx Subject: [isalist] PPTP Interface not working Hello, I have a site to site VPN based on a PPTP VPN that has stopped working. I have received the following error when attempting to start the interface. An error occurred during the connection of the interface. The modem (or other connecting device) is already in use or is not configured properly. PPTP clients on my internal network can connect to the target server but the Demand Dial Interface on my ISA server returns this error. I have been using this connection for over a year and it seems to have stopped working after I applied the latest patches to my ISA 2006 SP1 Server. That may not have anything to do with the problem. I don't see any traffic in the ISA Logs. Can anyone help me out with troubleshooting this problem. Thanks Bill