Didn't work. :-( However it did change something. I now have this mystery in the IPSec Policy summary on the ISA server. 192.168.1 is the remote network however there is only 1 subnet on that end. The router is serving up DHCP addresses to the client PC's on that end in the 192.168.1.100 - .200 range. Why am I seeing these subnets? Remote Network 'Chicago' IP Subnets: Subnet: 75.49.147.185/255.255.255.255 Subnet: 192.168.1.1/255.255.255.255 Subnet: 192.168.1.100/255.255.255.252 Subnet: 192.168.1.104/255.255.255.248 Subnet: 192.168.1.112/255.255.255.240 Subnet: 192.168.1.128/255.255.255.128 Local Network 'Internal' IP Subnets: Subnet: 192.168.26.0/255.255.255.0 Amy Babinchak Harbor Computer Services 248-546-6056 Office 248-890-1794 Mobile ISA: http://isainsbs.blogspot.com for Clients: http://smalltechnotes.blogspot.com Website: http://www.harborcomputerservices.net ________________________________ From: isapros-bounce@xxxxxxxxxxxxx [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Stefaan Pouseele Sent: Monday, December 18, 2006 11:00 AM To: isapros@xxxxxxxxxxxxx Subject: [isapros] Re: FIX: The client connections are dropped frequently when you use the IPsec tunnel through a NAT device on a Windows Server 2003 Service Pack 1-based server Hi Tom, Check out http://blogs.isaserver.org/pouseele/2006/09/08/a-new-ipsec-quick-mode-se curity-association-is-negotiated-every-5-minutes-when-you-use-an-ipsec-t unnel-mode-connection-on-a-windows-2003-sp1-based-server/ ;-) HTH, Stefaan From: isapros-bounce@xxxxxxxxxxxxx [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas W Shinder Sent: maandag 18 december 2006 16:43 To: isapros@xxxxxxxxxxxxx Subject: [isapros] Re: FIX: The client connections are dropped frequently when you use the IPsec tunnel through a NAT device on a Windows Server 2003 Service Pack 1-based server That might do it. The person I got the link from had issues that sounded very similar to yours. Tom Thomas W Shinder, M.D. Site: www.isaserver.org <http://www.isaserver.org/> Blog: http://blogs.isaserver.org/shinder/ Book: http://tinyurl.com/3xqb7 MVP -- Microsoft Firewalls (ISA) ________________________________ From: isapros-bounce@xxxxxxxxxxxxx [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Amy Babinchak Sent: Monday, December 18, 2006 9:42 AM To: isapros@xxxxxxxxxxxxx Subject: [isapros] Re: FIX: The client connections are dropped frequently when you use the IPsec tunnel through a NAT device on a Windows Server 2003 Service Pack 1-based server This could be the solution to the problem I'm having with the linksys router. It gets connected, get to quickmode and then drops. Amy Babinchak Harbor Computer Services ________________________________ From: isapros-bounce@xxxxxxxxxxxxx [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas W Shinder Sent: Monday, December 18, 2006 10:29 AM To: isalist@xxxxxxxxxxxxx; isapros@xxxxxxxxxxxxx Subject: [isapros] FIX: The client connections are dropped frequently when you use the IPsec tunnel through a NAT device on a Windows Server 2003 Service Pack 1-based server For those of you having problems with IPSec tunnel mode to downlevel VPN gateways: FIX: The client connections are dropped frequently when you use the IPsec tunnel through a NAT device on a Windows Server 2003 Service Pack 1-based server: http://support.microsoft.com/kb/923339