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Small Business Server Support Forum    
Forums > Microsoft Small Business Server 2003 & 2000 > Small Business Server 2000
Subject: DNS Registration via VPN
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Greg Cotten User is Offline
Canada
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6/3/2008

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6/03/2008 03:19 PM  
My first post...
 
I've got one SBS 2000 running DHCP / DNS / AD for two sites connected via Cisco Router Site to Site VPN.
 
I've having troubling joining the domain from the remote site.  IP info seems correct to client, but Network is Not Available when trying to join.  Furthermore, client does not get registered in SBS DNS table.  Nothing shows up in EV.  I can ping the IP both ways, but of course SBS to Client with Client Name is no go, since it's not registered in DNS.  This seems to be the heart of the problem. 
 
Here's the configuration:
 
Site A  (DC Site)        
IP Subnet: 192.168.1.0/24         
Gateway        192.168.1.1         
Clients:        DHCP from SBS       
 
Site B (VPN Remote Site)
IP Subnet:    192.168.22.0/24
Gateway:    192.168.22.1
DHCP from SBS via DHCP Relay Agent
Clients are W2KP, XP, and NT4 WS.
-------------------------------
SBS 2000 Settings:
IP: 192.168.1.201/24
Gateway1: 192.168.1.1
Gateway2: 192.168.22.1 (???)
DNS: 127.0.0.1
Enable LMHosts Lookup
Enable NetBIOS over TCP/IP
WINS is OFF
 
DHCP Settings on SBS for 192.168.22.0 Subnet:
Automatically Update DHCP client info into DNS
Enable Update for DNS Clients that do no support dynamic update (for NT4 WS)

DNS Settings on SBS:
AD Integrated
Allow Dynamic Updates
No WINS / Zone Transfers
 
Any help would be appreciated.
 
Thanks.
robert pearman User is Offline
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6/03/2008 03:24 PM  
have you set the dns server address for machines in the remote site to be the sbs server in the main site?
Greg Cotten User is Offline
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6/03/2008 04:01 PM  
Thanks for the clarification, Robert...
 
Yes, the DNS server is set to the SBS server for both sites... this is being supplied properly by the DHCP service, and I've checked it on the clients.
 
robert pearman User is Offline
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6/03/2008 09:13 PM  
ok ,

so opening a cmd prompt from a client at the remote site and typing nslookup provides what response?
Greg Cotten User is Offline
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6/03/2008 10:18 PM  
sadiesql.sunriseah.local
192.168.1.201
 
 
robert pearman User is Offline
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6/04/2008 11:11 AM  
hmmm bit strange that they are not registering then.

on the properties of the lan card, under tcp/ip, advanced, dns, is it set to register in dns?

can you show us an ipconfig /all from a client at the remote site?
Greg Cotten User is Offline
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6/04/2008 02:56 PM  
Windows IP Configuration
Host Name . . . . . . . . . . . . : T2450
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : SunriseAH.local

Ethernet adapter Wireless Network Connection 3:
Connection-specific DNS Suffix . : SunriseAH.local
Description . . . . . . . . . . . : Linksys Instant Wireless Network PCCard V3.0
Physical Address. . . . . . . . . : 00-06-25-2B-04-93
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.22.121
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.22.1
DHCP Server . . . . . . . . . . . : 192.168.1.201
DNS Servers . . . . . . . . . . . : 192.168.1.201
Lease Obtained. . . . . . . . . . : Wednesday, June 04, 2008 10:20:58 AM
Lease Expires . . . . . . . . . . : Thursday, June 12, 2008 10:20:58 AM
 
Sorry I was on another project yesterday, but I'd like to focus on this today... thanks for your help.
robert pearman User is Offline
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6/05/2008 01:02 PM  
what are the security settings on the sbs dns zone?

if it is set to secure updates only, that may be preventing the registration......... its been a few years since i covered this and i cant remember if only a domain pc is capable of a secure update - or if using the domain dhcp server is enough.

try changing the security to secure and unsecure, then running ipconfig /registerdns at a client. see if it registers then.
Greg Cotten User is Offline
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6/06/2008 02:43 PM  
Here are the DHCP server's settings re DNS tab:
Automatically Update Client DHCP Information in DNS
Update DNS only if DHCP Client Requests
Enable updates for clients not supporting DNS Dynamic Updates

DNS mydomain.local Settings
Active Directory - integrated
Allow Dynamic Updates = Yes

Perhaps these should not be AD - integrated???

Thanks.
Marina Roos User is Offline
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8/30/2008 10:52 PM  
Hi Greg,

Did you figure this out yet?
Marina Roos Smallbizserver.Net AdministratorMission accomplished. We have joined the branch office to our SBS 2003 Headquarters and have the same user experience on the branch office as we have on our local  network at the Headquarters. Want to know how? Signup up for a subscription and get instant access to the article series 'How to add an additional Domain Controller from a remote office to the SBS domain'
Greg Cotten User is Offline
Canada
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6/3/2008

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8/31/2008 02:12 AM  
Hi Marina,

Interesting that you should ask -- I just had a breakthrough on this whole situation this week... the main issue was related to packets being fragmented along my VPN, once I set EnablePMTUBHDetect in the Windows Registry it began sending smaller packets, which has now allowed my remote LAN to participate fully in my head office LAN, including all Network Shares, etc...

Thanks for your help.

This can be closed.

Best Regards,
Greg
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Forums > Microsoft Small Business Server 2003 & 2000 > Small Business Server 2000 > DNS Registration via VPN


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