TMG 2010 and hyper-v guest issue with windows update 80072EE2

I was trying to set up a temporary hyper-v server for demo/training purposes this week and ran into a windows update issue with a 2008 r2 guest on it. I turned on logging at my TMG server just to make sure the packets were getting out okay and then I noticed an odd error that popped up - 0xc0040018 FWX_E_BAD_LENGTH_PACKET_DROPPED - the packet was dropped because its IP length field does not fall within the allowed range or is inconsistent with the actual length.


So I tried looking that one up on the web and came up pretty dry other than the list of error codes from Technet. I decided to change gears and approach it from the other direction and went off in search of the windows update error code 80072EE2 which led me to this blog post:

http://msmvps.com/blogs/thenakedmvp/archive/2009/11/08/windows-update-error-80072ee2-hyper-v-guest-issues.aspx

And then it all clicked together. The offload settings weren't working right on the sub-standard hyper-v server I was using and the effect I was seeing on the firewall was incorrect packet lengths. As soon as I turned off the offload settings on the host server for that network card the windows update problems on the guest OS all went away.

My new favorite spare parts vendor for old Dell Poweredge Servers

(Yes, this post is going to be a vendor plug as you should deduce from the title.)

We all have them lurking in our data centers, those old servers that you just can't seem to kick the users off of and retire gracefully. Inevitably, that server will suffer a hardware failure and if it's a Dell and more than 3 years old the chances are that after a half hour on the phone bouncing around they'll finally just admit that they don't have the part and have no idea when it'll ever be in stock again. Oh, but if it ever did magically appear it'll cost $800.

While digging through the forums I noticed another user had recommended Velocity TechSolutions http://www.velocitytechsolutions.com/ I'm always a little skeptical of new sites but being in a pinch I wasn't going to be picky. After a quick search through the site I found the parts kit that I needed for $99. I went ahead and ordered it with overnight shipping and had a fedex tracking confirmation within a few hours and the parts were here the next morning. Overall I've got a good first impression of them.