I have an ASA5505 in our main office that is talking to some 871 Routers in remote offices. I have a working config for a site to site vpn. Last night I got a call that it appeared that it was down. I checked it out and couldn't see to get it to come back up from remote.
I came into the main office and rebooted the ASA, as I couldn't ping the external IP of the router in the remote office through our network but from my home machine it was responding fine. That didn't help.
So I made the 45 Min. drive to the remote office to check it out locally. I got my laptop hooked up and the config for the VPN was not showing up in ADM. It was "gone". I re-created it and it came back up.
Any ideas what could cause this? I have saved the config naturally, so it should stay through any power outage or reboot. Though one was not reported yesterday. I am baffled by this....