What could be the cause of 5 of my Cisco ASA 5505 to lock up. During this time Internet is blocked, you can't ping it. Once you reload the asa via console cable or powercycle, connectivity is restore. They have the latest IOS and ASA software. They all have static ips and connected to Cisco routers, which contain the CSU/DSU for a T-1 connection. We do not have this problem with the ASAs that are provided dhcp from routers such as a cable Time Warner connection.