Whoa - why did Google bork us?
cpg: Well, we found the issue!I started to look at the WMT crawl info and there were a bunch of network unreachable errors.Here is what happened: our site being PR6/7, we started getting a lot of scans for exploits. Some of them over and over. A few months ago I wrote a rule-based procedure to automatically block these IPs at the firewall level.Well, someone had tricked Googlebot into searching our site by using a "break in" URL, so Googlebot fell trap to that and got blocked.Interestingly, most of the access to our site from Google were from one IP and it was blocked for a little while.In the end, since the "admin" site was a copy of the main site, it effectively acted as the backup!We've taken steps in the rules to not block Googlebot :)