Xeon? Probably not.
There's no way that well-sealed box could comfortably dissipate the full 100W that USB3 could deliver to it, so I suspect the CPU is more pedestrian. The Atom® x5-E3930 would fill the bill rather nicely: two cores, 8GB RAM max, (just) enough PCIe for those two Ethernet ports, a couple of SATA interfaces for two 4TB SSDs. And capable of a bit of undemanding virtualization. Dead cheap, and with an industrial operating temperature range, too.