Hi Tom, Check out http://blogs.isaserver.org/pouseele/2006/09/08/a-new-ipsec-quick-mode-securi ty-association-is-negotiated-every-5-minutes-when-you-use-an-ipsec-tunnel-mo de-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