Are you using the Global VPN client from Sonicwall to connect to ISA or
are you connecting a Sonicwall Appliance to ISA? If you're using the Global
VPN Client from Sonicwall, I'd suggest switching to the native VPN client in
XP or writing an IPSec Policy for W2K. If you are connecting the appliance
to ISA then check the SA lifetime on both ISA and SW confirm they are the
same. I use 3 SW appliances to connect to 2 ISA 2004 Ent. servers and
haven't had many problems once I got initial configuration sorted out.
Fairway Consulting Group Inc.