Server 2003 DNS Question

We just installed a 2003 PDC onto a privous peer-to-peer network with a 3
Com LAN modem for Internet sharing. All clients (6) are Win2000.

The customer wants to continue using the LAN modem.

The server is working correctly. All clients have joined the domain and can
log in without error. The server has a static IP and points to itself for
DNS. Clients all use DHCP and point to the DNS's IP. All have the LAN
modem's IP for Default Gateway.

The LAN Modem has been configured, all computers can see it and access the
Internet. The problem is DNS traffic is causing the LAN modem to repeatedly
dial. It is hearing the UDP and ICMP requests then dialing to try to resolve
it.

I know this is what the DNS does, but is there a way to keep the DNS from
trying to use the Internet for resolution?

Thanks in advance,
Charlie

In news:(E-Mail Removed),
C. Brown <(E-Mail Removed) > posted a question
Then Kevin replied below:
: We just installed a 2003 PDC onto a privous peer-to-peer network with
: a 3 Com LAN modem for Internet sharing. All clients (6) are Win2000.
:
: The customer wants to continue using the LAN modem.
:
: The server is working correctly. All clients have joined the domain
: and can log in without error. The server has a static IP and points
: to itself for DNS. Clients all use DHCP and point to the DNS's IP.
: All have the LAN modem's IP for Default Gateway.
:
: The LAN Modem has been configured, all computers can see it and
: access the Internet. The problem is DNS traffic is causing the LAN
: modem to repeatedly dial. It is hearing the UDP and ICMP requests
: then dialing to try to resolve it.
:
: I know this is what the DNS does, but is there a way to keep the DNS
: from trying to use the Internet for resolution?
:
: Thanks in advance,
: Charlie

The first thing to do is go into the properties of the DNS server on the
Forwarders tab and check the box "Do not use recursion" this will stop you
DNS server from using its root hints.
Also make sure all clients and the DC only have the local domain name in the
DNS search list.
The reason for this is that these names are appended to all queries, if you
have any names in the search list that are not in the local DNS server they
will be forwarded or DNS will attempt to use Root hints to resolve the name.

You need to apply the latest Service pack on all machines.

Single label domain names can cause this to please post an ipconfig /all and
the actual domain name from ADU&C.

--
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
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In news:(E-Mail Removed),
C. Brown <(E-Mail Removed) > posted their
thoughts, then I offered mine
> We just installed a 2003 PDC onto a privous peer-to-peer network with
> a 3 Com LAN modem for Internet sharing. All clients (6) are Win2000.
>
> The customer wants to continue using the LAN modem.
>
> The server is working correctly. All clients have joined the domain
> and can log in without error. The server has a static IP and points
> to itself for DNS. Clients all use DHCP and point to the DNS's IP.
> All have the LAN modem's IP for Default Gateway.
>
> The LAN Modem has been configured, all computers can see it and
> access the Internet. The problem is DNS traffic is causing the LAN
> modem to repeatedly dial. It is hearing the UDP and ICMP requests
> then dialing to try to resolve it.
>
> I know this is what the DNS does, but is there a way to keep the DNS
> from trying to use the Internet for resolution?
>
> Thanks in advance,
> Charlie

In addition to Kevin's responses, I would also look at other things
installed on people's machines. Things such as:

1. ICQ
2. Yahoo Instant Messenger
3. MSN Messenger
4. Ad and trackware software (which are more than likely installed
unintentionally from visiting various websites and would need Adaware 60 to
remove them)
5. Realtime Stock Quoting software
6. Anything else along these lines.

If using Dialup or ISDN, I would also read up on these articles:

134985 - Browsing & Other Traffic Incur High Costs over ISDN Routers:
http://support.microsoft.com/?id=134985

265395 - Windows 2000 Member Runs Discovery Every 15 Minutes with Possible
High Dial-on-Demand Line Costs:
http://support.microsoft.com/?id=265395

Windows 2000 Server Bug - Ras always dialing out issue and eating up
bandwidth and line costs:
http://www.win2000mag.net/Articles/I...rticleID=22362


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
--
=================================

"C. Brown" :
: We just installed a 2003 PDC onto a privous peer-to-peer network with a 3
: Com LAN modem for Internet sharing. All clients (6) are Win2000.
:
: The customer wants to continue using the LAN modem.

2K3 server, (6) 2K workstations, dialup.

Is this line a stand-alone analog line or is it part of a PRI with an analog
port?
I wonder what the cost of the current system vs xDSL, if available? We
already know the performance increase would be significant. If you can move
them to xDSL with little or no increase, in fact, probably a decrease, then
the current issue is moot.

I'm not familiar with 3COM LAN modem so if this is ISDN, I'm sure the cost
is probably less with xDSL or even cable.

--
Roland

This information is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of merchantability
or fitness for a particular purpose.

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