RE: IPSec VPN Problems
- From: v-edtian@xxxxxxxxxxxxxxxxxxxx (Edward Tian)
- Date: Tue, 08 Nov 2005 07:36:05 GMT
Hi Steve:
Thanks for posting here.
>From the description, I understand that you have deployed a
router-to-router IPSec VPN tunnel between the main office and remote
office. Everything was working fine at the beginning. Recently the XP
client at the remote office side cannot access the SQL Server on the SBS
Server at the main office side. Your network diagram looks like the
following:
Internal clients-SBS Server-Router---Internet---Router-Remote XP clients
If I have misunderstood, please kindly correct me and provide me the
accurate one.
Before we go any further, could you tell me if the ISA Server 2004 is
installed on the SBS Box? I would like to suggest you first re-run the
CEICW Wizard, the wizard can help us configure the networking settings for
a SBS server. You may refer to this KB article to complete the wizard:
825763 How to configure Internet access in Windows Small Business Server
2003
http://support.microsoft.com/?id=825763
If the problem persists after we re-run the wizard, please help me gather
the following information in order to narrow down this issue:
1. If you directly establish a PPTP connection (using the windows built-in
VPN connection) from the XP Client at the remote office side to the
external IP address of the SBS Server, will you be able to access the SQL
Server?
2. Once the IPSec tunnel was established, try establishing a second PPTP
connection to the SBS Server (go through the IPSec VPN tunnel as you
mentioned), will you be able to access the SQL Server?
3. Once the IPSec tunnel was established, from the remote XP client, can
you ping the external IP address of the SBS Server?
4. How does the SQL application work? Which way does the application use to
connect to the SQL Server on the main office side, IP address or computer
name?
5. Please type ipconfig/all on both the remote XP client and the SBS
Server, and post the output to me in the reply.
6. Is there any third-party software installed on the SBS Server or XP
client? If so, please temporarily disable them and see if the problem can
be resolved. If possible, please also disable the Windows Firewall on the
remote client.
Thank you for your time and cooperation. Please feel free to let me know if
you have any questions or concerns.
Have a nice day! :)
Best Regards
Edward Tian(MSFT)
Microsoft CSS Online Newsgroup Support
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--------------------
| Thread-Topic: IPSec VPN Problems
| thread-index: AcXj2DsFkSc2t8oDRe2BbxbelYfKnw==
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| From: "=?Utf-8?B?U3RldmUgSGFwcA==?=" <SteveHapp@xxxxxxxxxxxxxxxxxxxxxxxxx>
| Subject: IPSec VPN Problems
| Date: Mon, 7 Nov 2005 12:17:09 -0800
| Lines: 26
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|
| Hello:
|
| Is anyone suddenly experiencing problems with their router to router VPN?
| It was working fine at the beginning of last week, but suddenly I can't
pull
| up backend SQL data from the SQL server over the VPN.
|
| I have a W2003 SBS server running SQL Server and Exchange behind a
| Watchguard Firebox Edge x15 at our main office.
| I have a remote office with no server and 4 XP Pro PCs behind a
Watchguard
| Firebox Edge x5.
| I have an IPSec VPN running from router to router.
|
| The remote office PCs use a front end SQL application accessing the
backend
| data on the SQL server in the main office.
|
| A "soft" PPTP VPN setup on the remote XP boxes to the external IP of the
| main office Watchguard (passed through to the W2003 server) works.
| A "soft" PPTP VPN setup on the remote XP boxes to the INTERNAL IP of the
| W2003 server (meaning this VPN is going through the IPSec VPN) works.
|
| After hours with Watchguard technicians, they have determined it is a
| Windows problem.
|
| Any help or suggestions would be appreciated!
|
| Steve
|
.
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