Pre-release of Version 2.1.8

[Garber, Neal]

> At approximately 08:40 something happens, and a lot of servers are
> flagged as dead or zombie.  

> This could of course have been caused by network problems, but there was
> no such problem at this time. Proxying goes over the same interface as

When it fails, is it always at night?  If so, could it be related to network load - perhaps backups that are running?  You could try capturing the output from a continuous ping to see if you start getting timeouts or really long response times between FR and one of the proxy servers that are having problems (obviously you'd want to check before, during and after the problem occurs).  

Said differently, maybe this isn't a FreeRadius problem..