Solved

SBS 2008 VPN Connection causes blue screen

Posted on 2010-11-25
4
730 Views
Last Modified: 2012-05-10
We recently installed a new HP SBS 2008 server as a single domain controller. During installation DHCP address range was picked automatically from the router (10.0.0.1 - 10.0.0.255) and the server itself was assigned 10.0.0.2.

All was working well except when I connected my iPhone using VPN. After two or three connections and disconnections the server consistently failed with a blue screen. The memory dump indicated issues with the network driver. Other devices and PCs did not cause this issue.

After extensive investigation by HP, where no hardware fault could be found, the cause was found by ourselves to be the allocation of IP addresses to the WAN Miniports used by VPN. In this case DHCP was allocating the server IP itself (10.0.0.2) to the VPN connection and it was this conflict that caused the blue screen

Our solution was to change the IP address of the server to one much higher up the range (.222). The WAN Miniports always seem to be allocated low available numbers such as .2.3.4.5 etc.

Thought this information might be useful to others and would appreciate any comments from those of you who understand these things as to why it happened.
0
Comment
Question by:clydecomputing
  • 2
  • 2
4 Comments
 
LVL 77

Expert Comment

by:Rob Williams
ID: 34213673
Thanks you clydecomputing for your findings.
Just to add to that:
SBS has numerous requirements. The most important being the wizards are used, and although it is not compulsory, the SBS should be the DHCP server. If the latter is not going to be the case see the following:
http://sbs.seandaniel.com/2008/10/do-i-absolutely-have-to-run-dhcp-on-sbs.html

When you run the Connect to the Internet address wizard it will set up DHCP on the server and also create an exclusion for the server IP so that what you are experienced cannot happen.
To further avoid a conflict it is important to use the VPN wizard from the SBS console and not the RRAS wizard.
Following SBS Best practices, which can be confirmed by the Best Practices Wizard below, should avoid such problems.
http://www.microsoft.com/downloads/en/details.aspx?familyid=86a1aa32-9814-484e-bd43-3e42aec7f731&displaylang=en
0
 

Author Comment

by:clydecomputing
ID: 34213738
Thanks for the comment. The SBS server is the DHCP server and we did use the connect wizard when setting up the server. Should we now add the new server IP as an exclusion?
0
 
LVL 77

Accepted Solution

by:
Rob Williams earned 50 total points
ID: 34213765
Odd that it didn't do that by default, but yes it is a good safety.
0
 

Author Closing Comment

by:clydecomputing
ID: 34233463
Problem had largely been resolved prior to post
0

Featured Post

Easy, flexible multimedia distribution & control

Coming soon!  Ideal for large-scale A/V applications, ATEN's VM3200 Modular Matrix Switch is an all-in-one solution that simplifies video wall integration. Easily customize display layouts to see what you want, how you want it in 4k.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Remote Desktop GATEWAY server 2008 to 2012 cutover 5 68
RAID Configuration 18 62
ASA Tunnel 18 42
Cannot join Win10 client  to SBS 2011 Standard domain... 20 74
Secure VPN Connection terminated locally by the Client.  Reason 442: Failed to enable Virtual Adapter. If you receive this error on Windows 8 or Windows 8.1 while trying to connect with the Cisco VPN Client then the solution is a simple registry f…
If you are a user of the discontinued Microsoft Office Accounting 2008 (MSOA) and have to move to a new computer running Windows 8, you will be unhappy to discover that it won't install.  In particular, Microsoft SQL Server 2005 Express Edition (SSE…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

789 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question