Re: Dynamic DNS, DNS Records & Scavenging

Hi Kevin,

Thanks for your reply. I have set it up as described in the article and how
you have set yours up. Unfortunately its still not updating records for
remote VPN clients. Anyother thoughts.

"Kevin D. Goodknecht Sr. [MVP]" <admin@xxxxxxxxxxxxxx> wrote in message
news:eVjyDtHpIHA.4672@xxxxxxxxxxxxxxxxxxxxxxx
Read inline please.

In news:OJCJMyEpIHA.552@xxxxxxxxxxxxxxxxxxxx,
David <wibble@xxxxxxxxxx> wrote:
Hi there,

I posted this on the Server.general newsgroups but not heard anything
back. Probably isn't the right newsgroup really. Thought i would try
here to see if anyone can help;

We have an issue whereby we want external clients to register there
VPN IP addresses in DNS. The VPN connections are handled by a RAS
server which gets the IP addresses from DHCP. There are two DHCP
Servers;

DC01 DHCP,DNS, Domain Controller

Server01 DHCP,DNS, Domain Controller

Server02 RAS

Both the servers are set to update A and PTR records for clients. In
DNS however this doesn't seem to be the case. I then added DC01 to the
DNSUpdateProxy and when i did this i saw my test laptop register its
ip in dns. I then disconnected and reconnected and got a different IP
address. the ip address i got then was one which was already
associated with an A record for another computer but the lease for
the IP had expired hence why it was assigned to me. With the DHCP
servers there are no overlaps in the IP address scopes. Do you think
the A record for the other computer is stopping my system from
registering a DNS record?

Please note that there is no scavenging turned on at the server or
the zone levels.

David.


In my opinion, there is really no need for scavenging if the clients and
the
DHCP servers are properly configured.

Have you created a new dedicated user account and configured the
credentials
into both DHCP servers?

Here is a great article explaining how DHCP and DNS interact, and tells
why
you can disable DDNS on DHCP clients, you are basically making them act
like
Pre-Windows 2000 clients that cannot register in DNS.

Using DNS servers with DHCP:
http://technet2.microsoft.com/WindowsServer/en/library/d0e19b57-c368-46c2-b017-caf25ae150ec1033.mspx?mfr=trueOn
all networks I manage, I have cleared the "Register this
connection'saddresses in DNS" check box on all DHCP addressed clients, and
configuredDHCP to register for the clients. Doing this prevents the issue
of oneclient updating a record registered by another DHCP client because
all DHCPclients are registered by the DHCP server.Here are the recommended
DHCP options I use.In addition use these Options,003 (router),006 (DNS
Server),044 (WINS Servers)046 (Node type 0x8)015 (DNS Domain Name)I also
have these Advanced DHCP options:001 Microsoft Windows 2000 Disable
NetBIOS(0x0)002 Microsoft Windows 2000 Release DHCP lease on shutdown
(0x1)On the DNS tab of the DHCP server properties ***:3. Enable DNS
updates according to the settings below:4. Always dynamically update DNS A
and PTR records5. Discard A and PTR records when lease is deleted.6.
Dynamically update DNS A and PTR records for DHCP clients that do
notrequest updates (for example, clients running Windows NT4.0)This final
setting is what allows clients that have DNS registrationsdisabled in
TCP/IP on the DNS tab, to be registered in DNS.Advanced tab of DHCP
propertiesClick the Credentials button and configure dedicated user
account (Normaluser with no special privileges)These settings even allow
my son's Xbox and my DirecTV HR20 DVR which runsLinux to be registered in
DNS. (For whatever use it is, it just proves thatDHCP can register for
Linux)--Best regards,Kevin D. Goodknecht Sr. [MVP]Hope This
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