I recently deployed an ASA 5505 and after powering this unit up, things seemed to be fine. After a few hours, all internal connections out to the Internet stopped. I have not been able to find the cause of this, but when this happens, I try pinging any internal computers from the ASA inside interface,I get time outs. After reloading the ASA the connections out to the Internet start working again. This seems like a random issue as the inside interface stops responding at various different times. We do run 10 plus individual Cisco VPN client connections out through this device, so maybe the problem lies there?