Persona is my ISP. For the past two days I — and every other Persona customer — have been suffering from seriously degraded connectivity: about half the addresses I would try to reach would simply not resolve. DNS seemed fine, but ping averages were occasionally high. Five different calls to five different tech support agents yielded a different answer each time (the core router was frequently fingered), but the final answer seems to be that Persona was having issues with a new upstream provider that they switched to on Monday. Everything seems fine this morning, though, so I’m crossing my fingers.