Question for Ace

A

Ace Fekay [MVP]

Cary Shultz said:
Ace,

In one of your posts, you offered to share with us your steps for
'dealing' with a DC that is multi-homed. I can not find the post. So, I
am letting you know that I would be very interested in your steps - as I
am sure that all of us are.

Thank you,

--
Cary W. Shultz
Roanoke, VA 24012

http://www.activedirectory-win2000.com
(soon to be updated!!!)
http://www.grouppolicy-win2000.com
(soon to be updated!!!)
Click to expand...

My pleasure, Cary. I like your website names too. If there's anything I can
help out with at your websites, let me know. I started a site years ago, but
never finished it. It is very time consuming. I may complete it one of these
days. I've closed much of it down lately. www.bandwidthpros.com.


Here you go...but first my views on multi-homed DCs... (ouch!)
==================================
Multi-homed DCs, What a Mess... It cuts into your drinking time...
:-(

Honestly, multi-homed DCs are not recommended because of the associated
issues that can occur, as you've encountered. We usually recommend
purchasing an inexpensive Linksys, DLink, etc, Cable/DSL router to perform
NAT for you, take out the extra NIC off the DC, but still let the DC handle
DHCP (and not the router).

Since this DC is multi-homed, it requires additional configuration to
prevent the public interface addresses from being registered in DNS. This
creates a problem for internal clients locating AD to authenticate and find
other services and resources such as the Global Catalog, file sharing and
the SYSVOL DFS share and can cause GPO errors with Userenv 1000 events to be
logged, authenticating to shares and printers, logging on takes forever,
among numerous other issues.

But if you like, there are some registry changes to eliminate the
registration of the external NIC. Here's the whole list of manual steps to
follow (this inculdes some of the stuff I already gave you):

But believe me, it's much easier to just get a separate NAT device or
multihome a non-DC then having to alter the DC. - Good luck!

===================================
1. In the DNS management console, in the properties of the DNS server,
Interfaces tab, set DNS to only listen on the private IP you want in DNS for
the server. This is for your private network that your clients use.


2. Add this registry entry with regedt32 to stop the (same as parent folder)
records and the GC record, also called the LdapIpAddress and GcIpAddress.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters
On the Edit menu, point to New, and then click REG_MULTI_SZ as the data
type:

Registry value: DnsAvoidRegisterRecords
Data type: REG_MULTI_SZ

(and in the box, you would type in the following to stop their
registration):

LdapIpAddress
GcIpAddress


3. Then you will need to manually create the LdapIpAddress and GcIpAddress
records in DNS.
The LdapIpAddress resolves to the domain controllers in the domain. The
GcIpAddress resolves
to the Global Catalogs in the forest as gc._msdcs.forestroot.com.

To manually create the LdapIpAddress, create a new host but leave the name
field blank,
give it the IP of the internal interface. Windows 2k barks at you saying
(same as parent folder) is not a valid host name,click OK to create the
record anyway.
Windows 2003 won't bark. It's house-broken out of the box.

To manually create the GcIpAddress, navigate to the _msdcs folder, under it
click the gc
folder, then rt-click, create new host, leave the name field blank, give it
the IP of the
internal interface. Windows 2k barks at you saying (same as parent folder)
is not a valid
host name,click OK to create the record anyway. Windows 2003 won't bark.


4. To stop registration of both NICs, add (if it exists) or alter this reg
entry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters

On the Edit menu, point to New, and then click DWORD Value to add the
following registry value:
Value name: RegisterDnsARecords
Data type: REG_DWORD
Value data: 0

Then manually create a new host record for the server name in DNS and give
it the IP of the internal interface


5. Right click on Network places, choose properties, in the Advanced menu
item
select Advanced settings. Make sure the internal interface is at the top of
the connections pane and File sharing is enabled on the internal interface.


6. On the outer NIC, disable File and Print Services, Microsoft Client
Service,
then go into IP properties, click on Advanced, choose the WINS tab and
disable NetBIOS.


7. On the outer NIC, only put in the internal IP address of the DNS server
(this machine).


8. If you haven't done so, configure a forwarder. You can use 4.2.2.2 if not
sure which
DNS to forward to until you've got the DNS address of your ISP. How to set a
forwarder?
Depending on your operating system,choose one of the following articles:

300202 - HOW TO: Configure DNS for Internet Access in Windows 2000
http://support.microsoft.com/?id=300202&FR=1

323380 - HOW TO: Configure DNS for Internet Access in Windows Server 2003
(How to configure a forwarder):
http://support.microsoft.com/d/id?=323380



*** Some additional reading:

246804 - How to enable or disable DNS updates in Windows 2000 and in Windows
Server 2003
http://support.microsoft.com/?id=246804

295328 - Private Network Interfaces on a Domain Controller Are Registered in
DNS
[also shows DnsAvoidRegisterRecords LdapIpAddress to avoid reg sameasparent
private IP]:
http://support.microsoft.com/?id=295328

306602 - How to Optimize the Location of a DC or GC That Resides Outside of
a Client's
Site [Includes info LdapIpAddress and GcIpAddress information and the SRV
mnemonic values]:
http://support.microsoft.com/?id=306602

825036 - Best practices for DNS client settings in Windows 2000 Server and
in Windows Server 2003 (including how-to configure a forwarder):
http://support.microsoft.com/default.aspx?scid=kb;en-us;825036

291382 - Frequently asked questions about Windows 2000 DNS and Windows
Server 2003 DNS
http://support.microsoft.com/default.aspx?scid=kb;en-us;291382

296379 - How to Disable NetBIOS on an Incoming Remote Access Interface
[Registry Entry]:
http://support.microsoft.com/?id=296379

292822 - Name Resolution and Connectivity Issues on Windows 2000 Domain
Controller with Routing and Remote Access and DNS Insta {DNS and RRAS and
unwanted IPs registering]:
http://support.microsoft.com/?id=292822
_________________________


Ace
 
C

Cary Shultz

Ace,

Thank you for the steps on the multi-homed Domain Controllers. I think that
I will play with it in a lab to 'get good'. This is good information. It
seems like a lot of people do this. Not sure why???? But lots seem to do
this and, as a result, have problems. These steps should alleviate these
problems. Hopefully your initial comments will scare the weary away from
doing this.

And Thank you for the comment on my web sites. The contents pretty much
stink at the moment. Well, better said, the content of the activedirectory
web site pretty much stinks. The grouppolicy web site is simply a 'we are
working on this' site. Anyway, now I am in a better position time-wise to
do something. What you currently see was thrown together in about one hour.
Boy, does it look like it!

I might just run a couple of ideas by you....since you offered. No worries,
though. It is not going to start out as a drip and eventually become a
busted dam! And feel free to comment. I am a big boy. You will not hurt
my feelings!

Took a spin over to your site ( never knew!!! ). Interesting. Using
Frames. Never thought of that. But, like I said, I threw my site up in
about one hour! Going to change the content and then - eventually - going
to change the format ( using CSS and whatever I can learn! ).

Anyway, time to go to bed.

--
Cary W. Shultz
Roanoke, VA 24012

http://www.activedirectory-win2000.com
(soon to be updated!!!)
http://www.grouppolicy-win2000.com
(soon to be updated!!!)



"Ace Fekay [MVP]"
Cary Shultz said:
Ace,

In one of your posts, you offered to share with us your steps for
'dealing' with a DC that is multi-homed. I can not find the post. So, I
am letting you know that I would be very interested in your steps - as I
am sure that all of us are.

Thank you,

--
Cary W. Shultz
Roanoke, VA 24012

http://www.activedirectory-win2000.com
(soon to be updated!!!)
http://www.grouppolicy-win2000.com
(soon to be updated!!!)
Click to expand...

My pleasure, Cary. I like your website names too. If there's anything I
can help out with at your websites, let me know. I started a site years
ago, but never finished it. It is very time consuming. I may complete it
one of these days. I've closed much of it down lately.
www.bandwidthpros.com.


Here you go...but first my views on multi-homed DCs... (ouch!)
==================================
Multi-homed DCs, What a Mess... It cuts into your drinking time...
:-(

Honestly, multi-homed DCs are not recommended because of the associated
issues that can occur, as you've encountered. We usually recommend
purchasing an inexpensive Linksys, DLink, etc, Cable/DSL router to perform
NAT for you, take out the extra NIC off the DC, but still let the DC
handle DHCP (and not the router).

Since this DC is multi-homed, it requires additional configuration to
prevent the public interface addresses from being registered in DNS. This
creates a problem for internal clients locating AD to authenticate and
find other services and resources such as the Global Catalog, file sharing
and the SYSVOL DFS share and can cause GPO errors with Userenv 1000 events
to be logged, authenticating to shares and printers, logging on takes
forever, among numerous other issues.

But if you like, there are some registry changes to eliminate the
registration of the external NIC. Here's the whole list of manual steps to
follow (this inculdes some of the stuff I already gave you):

But believe me, it's much easier to just get a separate NAT device or
multihome a non-DC then having to alter the DC. - Good luck!

===================================
1. In the DNS management console, in the properties of the DNS server,
Interfaces tab, set DNS to only listen on the private IP you want in DNS
for
the server. This is for your private network that your clients use.


2. Add this registry entry with regedt32 to stop the (same as parent
folder)
records and the GC record, also called the LdapIpAddress and GcIpAddress.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters
On the Edit menu, point to New, and then click REG_MULTI_SZ as the data
type:

Registry value: DnsAvoidRegisterRecords
Data type: REG_MULTI_SZ

(and in the box, you would type in the following to stop their
registration):

LdapIpAddress
GcIpAddress


3. Then you will need to manually create the LdapIpAddress and GcIpAddress
records in DNS.
The LdapIpAddress resolves to the domain controllers in the domain. The
GcIpAddress resolves
to the Global Catalogs in the forest as gc._msdcs.forestroot.com.

To manually create the LdapIpAddress, create a new host but leave the name
field blank,
give it the IP of the internal interface. Windows 2k barks at you saying
(same as parent folder) is not a valid host name,click OK to create the
record anyway.
Windows 2003 won't bark. It's house-broken out of the box.

To manually create the GcIpAddress, navigate to the _msdcs folder, under
it click the gc
folder, then rt-click, create new host, leave the name field blank, give
it the IP of the
internal interface. Windows 2k barks at you saying (same as parent folder)
is not a valid
host name,click OK to create the record anyway. Windows 2003 won't bark.


4. To stop registration of both NICs, add (if it exists) or alter this reg
entry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters

On the Edit menu, point to New, and then click DWORD Value to add the
following registry value:
Value name: RegisterDnsARecords
Data type: REG_DWORD
Value data: 0

Then manually create a new host record for the server name in DNS and give
it the IP of the internal interface


5. Right click on Network places, choose properties, in the Advanced menu
item
select Advanced settings. Make sure the internal interface is at the top
of
the connections pane and File sharing is enabled on the internal
interface.


6. On the outer NIC, disable File and Print Services, Microsoft Client
Service,
then go into IP properties, click on Advanced, choose the WINS tab and
disable NetBIOS.


7. On the outer NIC, only put in the internal IP address of the DNS server
(this machine).


8. If you haven't done so, configure a forwarder. You can use 4.2.2.2 if
not sure which
DNS to forward to until you've got the DNS address of your ISP. How to set
a forwarder?
Depending on your operating system,choose one of the following articles:

300202 - HOW TO: Configure DNS for Internet Access in Windows 2000
http://support.microsoft.com/?id=300202&FR=1

323380 - HOW TO: Configure DNS for Internet Access in Windows Server 2003
(How to configure a forwarder):
http://support.microsoft.com/d/id?=323380



*** Some additional reading:

246804 - How to enable or disable DNS updates in Windows 2000 and in
Windows Server 2003
http://support.microsoft.com/?id=246804

295328 - Private Network Interfaces on a Domain Controller Are Registered
in DNS
[also shows DnsAvoidRegisterRecords LdapIpAddress to avoid reg
sameasparent private IP]:
http://support.microsoft.com/?id=295328

306602 - How to Optimize the Location of a DC or GC That Resides Outside
of a Client's
Site [Includes info LdapIpAddress and GcIpAddress information and the SRV
mnemonic values]:
http://support.microsoft.com/?id=306602

825036 - Best practices for DNS client settings in Windows 2000 Server and
in Windows Server 2003 (including how-to configure a forwarder):
http://support.microsoft.com/default.aspx?scid=kb;en-us;825036

291382 - Frequently asked questions about Windows 2000 DNS and Windows
Server 2003 DNS
http://support.microsoft.com/default.aspx?scid=kb;en-us;291382

296379 - How to Disable NetBIOS on an Incoming Remote Access Interface
[Registry Entry]:
http://support.microsoft.com/?id=296379

292822 - Name Resolution and Connectivity Issues on Windows 2000 Domain
Controller with Routing and Remote Access and DNS Insta {DNS and RRAS and
unwanted IPs registering]:
http://support.microsoft.com/?id=292822
_________________________


Ace
Click to expand...
 
A

Ace Fekay [MVP]

Cary Shultz said:
Ace,

Thank you for the steps on the multi-homed Domain Controllers. I think
that I will play with it in a lab to 'get good'. This is good
information. It seems like a lot of people do this. Not sure why????
But lots seem to do this and, as a result, have problems. These steps
should alleviate these problems. Hopefully your initial comments will
scare the weary away from doing this.

And Thank you for the comment on my web sites. The contents pretty much
stink at the moment. Well, better said, the content of the
activedirectory web site pretty much stinks. The grouppolicy web site is
simply a 'we are working on this' site. Anyway, now I am in a better
position time-wise to do something. What you currently see was thrown
together in about one hour. Boy, does it look like it!

I might just run a couple of ideas by you....since you offered. No
worries, though. It is not going to start out as a drip and eventually
become a busted dam! And feel free to comment. I am a big boy. You will
not hurt my feelings!

Took a spin over to your site ( never knew!!! ). Interesting. Using
Frames. Never thought of that. But, like I said, I threw my site up in
about one hour! Going to change the content and then - eventually - going
to change the format ( using CSS and whatever I can learn! ).

Anyway, time to go to bed.
Click to expand...

My site is a mess. Try www.mraceman.com, it's a bit cleaner, but sparse. I
put that together in about an hour with FP using frames. But nothing really
technical there other than the weather report, if one calls that technical
anymore!

As for your website, I'll try to help out with anything I spot that may be
amiss. Don't worry, I'll comment! :)

Cheers!

Ace
 
A

Ace Fekay [MVP]

In
Cary Shultz said:
Ace,

Thank you. But please do not yet start. The current 'offering' is
not 'my final answer'! Hey, that was funny. I still got it, even at
6AM!
Click to expand...

Actually I don't have time to start yet. Got a full plate. But if any of my
posts are helpful, I can use that as a draft and clean it up.

:)
Ace
 

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