Windows Server - "Error 678 the remote computer did not respond" VPN outside a firewall.

Asked By rbanks on 28-Nov-07 08:43 AM
I shall try and be as detailed as possible.

Windows Server 2003 SBS R2 Standard (non-isa)
- Inside a Netgear DG834 Wired router on ADSL.
- 1701, 50,51, 500, 4500 ports forwarded too the server.
Windows XP SP2 Laptop client on a remote network
- Inside a Linksys Router.

2003 server setup for L2TP/IPSEC VPN with computer/user certificate
authentication.

Tested VPN inside the SBS network - works fine.....

Outside the network you get "Error 678 the remote computer did not
respond"

Microsoft Network Monitor 3.1 is installed on the server and on the
client
to troubleshoot this.

You can see the client sending data on UDP 500 and UDP 4500 towards
the
server.
You can see the server receive data on UDP 500 and UDP 4500.
You can see the server send data on UDP 500 and UDP 4500
You can then see the client recieve data on UDP 500 and UDP 4500

No other ports show up, whist some traffic is clearly flowing I still
get:
Error 678 the remote computer did not respond.

Any ideas?


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rbanks replied on 28-Nov-07 09:48 AM
Ok solved it myself.   But hope this helps someone!

Instructions for Vista
http://support.microsoft.com/kb/926179

Instructions for XP SP2
http://support.microsoft.com/default.aspx?kbid=885407


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v-robel replied on 30-Nov-07 04:38 AM
Hi Rbanks,

Thanks for posting in our newsgroup.

From your description, I know that you built L2TP/IPSEC VPN in SBS network.
You get "Error 678 the remote computer did not respond" when create VPN
connection from external. If that's not right, please don't hesitate to let
me know.

Please let me know the following to let me know the following to make the
situation more clearly:

1. How many NICs are there on het SBS server?
2. Did you configure Routing and Route Access services on the SBS server to
act as L2TP VPN server?

If you configure SBS003 as L2TP VPN server using RRAS, please take the
following steps to narrow down this issue:

Step 1: Take a cross over cable and attach the laptop directly to the
server's external NIC (suppose the server has 2 NICs), try to create VPN,
can the connection be successfully?

Step 2: Please rerun the CEICW wizard to make the network settings properly.

1. Click Start, click Server Management. Click To Do List and then click
2. Select Enable firewall and click Next. Ensure "Virtual Private Network"
is selected. Click Next.
3. Go through the steps to finish the wizard.

For more information, please refer to:

825763 How to configure Internet access in Windows Small Business Server
2003
http://support.microsoft.com/?id=825763

Step 3: Please try to visit the VPN with both PPTP and L2TP IPsec, can this
be successfully?

Hope this helps.

If you need further assistance, please don't hesitate to let me know.

Best regards,

Robert Li(MSFT)

Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security

=====================================================

This newsgroup only focuses on SBS technical issues. If you have issues
regarding other Microsoft products, you'd better post in the corresponding
newsgroups so that they can be resolved in an efficient and timely manner.
You can locate the newsgroup here:
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx

When opening a new thread via the web interface, we recommend you check the
any updates in your thread. When responding to posts via your newsreader,
please "Reply to Group" so that others may learn and benefit from your
issue.

Microsoft engineers can only focus on one issue per thread. Although we
provide other information for your reference, we recommend you post
different incidents in different threads to keep the thread clean. In doing
so, it will ensure your issues are resolved in a timely manner.

For urgent issues, you may want to contact Microsoft CSS directly. Please
check http://support.microsoft.com for regional support phone numbers.

Any input or comments in this thread are highly appreciated.

=====================================================

This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
firewall.
I shall try and be as detailed as possible.
respond"
client
the
get:


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rbanks replied on 03-Dec-07 10:13 AM
if you read the posts above yours, you would know I resolved the
problem.


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v-robel replied on 03-Dec-07 10:32 PM
Hi Rbanks,

Thanks for your reply.

I am glad to know the issue was resolved. You did good job.

Since there was synchronization problem between the Newsgroup and my
working tool, I didn't find your second reply and didn't notice that the
issue was resolved. I am sorry for the inconvenience.

I'd like to give you the following information for your future reference:

Routing and Remote Access
http://technet.microsoft.com/en-us/network/bb545655.aspx

Deploying Dial-up and VPN Remote Access Servers
http://technet2.microsoft.com/windowsserver/en/library/8ff3534e-0f08-45bc-84
87-3b618bc8ad621033.mspx

If you have any issue in future, please don't hesitate to post in our
newsgroup.

Best regards,

Robert Li(MSFT)

Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security

=====================================================

This newsgroup only focuses on SBS technical issues. If you have issues
regarding other Microsoft products, you'd better post in the corresponding
newsgroups so that they can be resolved in an efficient and timely manner.
You can locate the newsgroup here:
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx

When opening a new thread via the web interface, we recommend you check the
any updates in your thread. When responding to posts via your newsreader,
please "Reply to Group" so that others may learn and benefit from your
issue.

Microsoft engineers can only focus on one issue per thread. Although we
provide other information for your reference, we recommend you post
different incidents in different threads to keep the thread clean. In doing
so, it will ensure your issues are resolved in a timely manner.

For urgent issues, you may want to contact Microsoft CSS directly. Please
check http://support.microsoft.com for regional support phone numbers.

Any input or comments in this thread are highly appreciated.

=====================================================

This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
a firewall.
if you read the posts above yours, you would know I resolved the
problem.


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