Microsoft Forefront TMG - BSOD's and fweng.sys
What I'm going to try and explain now may be very vague, but I just want to see if anyone else has had the same issue as me, so here goes!
We have a Server 2008 Standard server. Installed on the server is Forefront TMG. I have configured a web chain out to a proxy the entire site uses provided by our local council. I have added all the rules into the firewall that we need as a school, and the net connection works exactly how I would expect it to.
The issue I have, is that when any changes are made to any aspect of networking on the server, I get a BSOD telling me that fweng.sys is the problem (I don't have dump log to hand, but I can get it if anyone thinks they might be onto something.)
The server can run in a stable fashion if the following is done:
- Disconnect internal and external interfaces from server
- Turn on server and leave to boot into Windows
- Log on and leave to settle
- reconnect network cables one at a time
- Check that internal shares can be reached
- Check that external websites can be reached
- Log off
Once it's up and running, it serves the whole site perfectly until you try to make any changes to it. I can log onto the server and use it in any fashion I wish. So long as I don't try to make any changes in Forefront or adjust any network settings, I can be sure it won't "fall over" again. Obviously this is no good for us, as we are unable to do anything to this server in it's current state.
We have disabled the internal network card, and have added an HP Broadcomm adapter in it's place. All drivers have been updated and we have attempted to run Windows update. When Windows update is run, we get a BSOD and the same error message about fweng.sys (which I believe is the Firewall Engine). We have NOT updated the firmware on the network cards, but we will be doing so over half term.
Basically, I was wondering if anyone has come across an issue like this. Idea's and suggestions are very welcome.