DNS resolution of two NICS on a server

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Guest

I have DNS running on two different domains. I have zone transfer
enabled. the problem is one site gets the second IP address that is
being used as a backup network and does resolve to the correct IP
Address.

How can this be resolved ?
 
scuba19 said:
I have DNS running on two different domains. I have zone transfer
enabled. the problem is one site gets the second IP address that is
being used as a backup network and does resolve to the correct IP
Address.
Click to expand...

"One site gets the second IP address that being used as a backup network..."

The above sentence makes no sense (to those of us who don't already
know your network.)

If multiple IP addresses are defined for the same name, then the
order they are return is somewhat unpredictable (depending on
Round Robin and Netmask Ordering settings, plus the IP of the client
requesting the resolution.)
How can this be resolved ?
Click to expand...

Be more explicit about your problem -- what you have (the resource
records) and what you want (resolution) to happen....
 
Machines on Network X tries to resolve a machine's IP address and
hostname on Network Y.

Network Y has a machine with two IP addresses 10.0.0.2 and 172.16.50.0 .
When a machine pings the machine in Network Y it responds with the IP
172.16.50.0 and i would like it to respond with the other IP address
10.0.0.2

The two networks are connected with a secure VPN with ISA2000 configured
scuba19 said:
I have DNS running on two different domains. I have zone transfer
enabled. the problem is one site gets the second IP address that is
being used as a backup network and does resolve to the correct IP
Address.
Click to expand...

"One site gets the second IP address that being used as a backup network..."

The above sentence makes no sense (to those of us who don't already
know your network.)

If multiple IP addresses are defined for the same name, then the
order they are return is somewhat unpredictable (depending on
Round Robin and Netmask Ordering settings, plus the IP of the client
requesting the resolution.)
How can this be resolved ?
Click to expand...

Be more explicit about your problem -- what you have (the resource
records) and what you want (resolution) to happen....

--
Herb Martin, MCSE, MVP
Accelerated MCSE
http://www.LearnQuick.Com
[phone number on web site]
Click to expand...
 
Machines on Network X tries to resolve a machine's IP address and
hostname on Network Y.

Network Y has a machine with two IP addresses 10.0.0.2 and 172.16.50.0 .
When a machine pings the machine in Network Y it responds with the IP
172.16.50.0 and i would like it to respond with the other IP address
10.0.0.2

The two networks are connected with a secure VPN with ISA2000 configured
 
As Herb pointed out, you can enable netmask ordering and disable
round-robin, that should force your DNS server to reply with the ip address
closest to the subnet of the source address of a ping (or any other) packet.

....kurt
 
In
Kurt said:
As Herb pointed out, you can enable netmask ordering and disable
round-robin, that should force your DNS server to reply with the ip
address closest to the subnet of the source address of a ping (or any
other) packet.
...kurt
Click to expand...

Or simply just single home the server.

My take on this for Scuba19 is that multihomed DNS and/or DCs are
problematic because of this adminstrative configuration overhead. Let the
infrastructure route packets and the DNS server offer the correct IP with
one NIC.

--
Ace

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

If you are having difficulty in reading or finding responses to your post,
instead of the website you are using, I would suggest to use OEx (Outlook
Express or any other newsreader of your choosing), and configure a newsgroup
account, pointing to news.microsoft.com. This is a direct link into the
Microsoft Public Newsgroups, and it is FREE and DOES NOT require a Usenet
account with your ISP. With OEx , you can easily find your post and watch &
track threads, sort by date, poster's name, watched threads or subject.

Not sure how? It's easy and you'll enjoy it
How to Configure OEx for Internet News
http://support.microsoft.com/?id=171164

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft MVP - Windows Server Directory Services
Microsoft Certified Trainer
Assimilation Imminent. Resistance is Futile.
Infinite Diversities in Infinite Combinations.
=================================
 
scuba19 said:
Machines on Network X tries to resolve a machine's IP address and
hostname on Network Y.

Network Y has a machine with two IP addresses 10.0.0.2 and 172.16.50.0 .
When a machine pings the machine in Network Y it responds with the IP
172.16.50.0 and i would like it to respond with the other IP address
10.0.0.2

The two networks are connected with a secure VPN with ISA2000 configured
on both ends. If I delete the DNS record on the DNS with 172.16.50.0
my
problem quickly fixed but would reappear in the future.
Click to expand...

Since these addresses are fully disjoint (not part of the same subnet
architecture)
you can use the "Advanced" DNS Server properties to enable NetMask Ordering,
even with round robin enabled this should put the "client net-address"
first, but
you may wish to also disable the round robing if you don't need it for
anything
else -- note: in more complicated cases you would NEED to disable it but
here they can both be enabled with the desired results (unless you made up
those
numbers and they don't represent a reasonably accurate analogy with your
real
nets.)

Or:
You can make sure that only one of the addresses is registered for internal
clients (in their DNS server, and yes, you should have two DNS servers if
there is BOTH an internal and an External address for the same machine, but
here you are showing two internal, i.e., private, addrress ranges.)


--
Herb Martin, MCSE, MVP
Accelerated MCSE
http://www.LearnQuick.Com
[phone number on web site]
Herb Martin said:
scuba19 said:
I have DNS running on two different domains. I have zone transfer
enabled. the problem is one site gets the second IP address that
is
being used as a backup network and does resolve to the correct IP
Address.
Click to expand...

"One site gets the second IP address that being used as a backup
network..."

The above sentence makes no sense (to those of us who don't already
know your network.)

If multiple IP addresses are defined for the same name, then the
order they are return is somewhat unpredictable (depending on
Round Robin and Netmask Ordering settings, plus the IP of the client
requesting the resolution.)
How can this be resolved ?
Click to expand...

Be more explicit about your problem -- what you have (the resource
records) and what you want (resolution) to happen....

--
Herb Martin, MCSE, MVP
Accelerated MCSE
http://www.LearnQuick.Com
[phone number on web site]
Click to expand...
Click to expand...
 
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