Some kind of fandango on core got bagend in a pretty sorry state. A reinstall solved that, and we're back up and running.
I've upgraded NTP from pkgsrc to 4.2.0 in response to some possible security holes.
Due to strange segfaults, I upgraded bagend successfully to NetBSD 1.6.2. I'm currently rebuilding everything, which will take at least a week.
I configured bagend as the new NTP server, seeing as how proto is down.
I have enabled SSL on bagend, giving encrypted access to Nagios.
I had to setup a virtual host in ssl.conf, and generate new SSL keys to reflect the actual DNS name of the machine.