We have a number of customers who have PIX 501/506E with VPN clients ranging from two to about ten for each customer. Clients have VPN Client version 184.108.40.206.0300 or version 5.0.02.0090 running on Windows XP or Windows Vista.
Recently some of these VPN clients experience intermittent VPN connectivity problem. Most times I reboot the PIX when this problem occurs. Clients were able to connect at times but at other times rebooting the PIX does not solve the problem. Clients had to reboot their Laptops at times before they could connect. Any ideas on what could be responsible for this type of problem?