I recently bought my a MGE Elipse 600 UPS.
So, of course I immediately installed it an connected my server at home to it.
After everything was up and running again I installed nut (/usr/ports/sysutils/nut & nut-usb), Connected the UPS to my system via the serial port.
All seemed to work fine at first, but soon enough nut started broadcasting messages that my ups was on battery while it wasn't.
So I connected the USB console cable instead of the serial one, but as soon as I started nut, it came back with this error: "No matching USB/HID UPS found". After a searching google for a while I found this article which solved my issue.

So in short, to get the ups management working with USB, do the following:
1 – Remove "device uhid" from your kernel config.
2 – Recompile your kernel
3 – mkdir /usr/ports/devel/libusb/files
4 – put this patch in /usr/ports/devel/libusb/files
5 – portupgrade -f libusb

You can find my nut configuration files here.
Enjoy.

When using windows load balancing, windows will create a virtual mac address which will be used for the real ip’s AND the virtual ip.
So if you look in your arp table you’ll see 3 ip’s, from which 2 are use on 2 servers and 1 is virtual, with the same mac address.

And now the really bad part: Windows will use different (non default) mac addresses on the interface, so the switch on which the servers are connected will see those mac address (different per server). But NOT the mac address used for the server and cluster ip’s. So, as soon as the incoming packets reach the switch, it does not know what to do with it and it will start flooding the whole vlan…
As you can read here, Microsoft does this on purpose…. *ARGH*

After reading this article on ShelleyTheRepublican.com I just couldn't believe people like this really mean what they say. But after reading some other articles (like this one), interrupted by many laughs, I'm afraid they do…. What the hell happened to those people? are they brainwashed? How can someone become so ignorant and arrogant…

O well, if you need some entertainment, this is a great place to enjoy yourself :)

UPDATE:

It seems that I (and many others ;)) am the victim of a very good hoax, see http://shelleytherepublican.com/meaning-and-purpose.html