Just a thought here, but looking at some of the scan data that was posted earlier on /., it would appear to be a Linux box!!! This leads to 3 posibilities;

1) They are tricking us into hosing a Linux box,
2) They have ported IIS to Linux and are testing that configuration, or
3) The scans are coming back incorrect.

I hope for the sake of the Linux comunity that it is (3) rather than the first 2. Man, think of the bad press for Linux!