We have a Cisco ASA 5505 that has randomly blocked all incoming VPN connections including our site to site VPN connection. The Site to Site VPN actually connects, but no data is passed. I am also not able to access the inside interface of the device using HTTPS which worked previously. Nothing had changed on this device for months so I'm confused as to what has happened. I've also tried resetting the device back to defaults and loading a newer version of the ASA operating system with the same results. Has anyone else had this problem before? Could the device be going bad? I've attached my sanitized config.