Hi,
I have an R210 II running pfSense 2.4 which runs perfectly for anytime between a few days and a month before experiencing a random reboot. After this initial crash, the reboots become increasingly frequent until the system is unable to POST.
When left unpowered for a few hours/days the system begins POST'ing again and works perfectly once again until the process repeats. I've found that if I wait one day then the system stays online for around two days and if I wait a week then the system will stay online for around two-three weeks before the system crashes.
There are no events being logged inside the System Event Log by the iDRAC. While booting the server presents error code 1-3-4 on the front panel LEDs.