A contractor set up our Colorado Springs office and Denver office with Cisco ASA 5505 units in October. Both units worked perfectly until about 3 weeks ago. At that time, the ASA unit in Denver started dropping the VPN connection after about 3 to 8 minutes of connectivity. All users with Cisco VPN client have seen the same behavior. All users in the Springs, who are connecting via VPN over IPSec are seeing the same behavior.
I spent about an hour on the phone with Qwest last week. They reported that the Denver office DSL circuit looked good and that the ASA had been authenticated without error for 12 days straight.
So, it appears that it’s the ASA in Denver that’s the problem child. Suggestions?