DNS question with shared IP address space

[ctvader]

We recently took over a company and we now need to resolve DNS queries
b/t the two. For arguments sake we'll call the companies company1 and
company2, where company1 took over comany2. However, company2 already
has an address space that is the same as in company1 and the only we
can to the "same" address space is by NAT. My question is this - what
is the best way to set up DNS to resolve hostnames in company2? Is
there a DNS translate tool out there?

Thanks.

 

[Ace Fekay [MVP]]

In

We recently took over a company and we now need to resolve DNS queries
b/t the two. For arguments sake we'll call the companies company1 and
company2, where company1 took over comany2. However, company2 already
has an address space that is the same as in company1

Can you elaborate on the following statement please? I am not sure how you
would be using NAT to get to access one subnet to the next, NAT or not, when
they both have identical IP subnets, unless you are accessing the WAN IP of
each other's NAT. Even still, that will not work with cross authentication
since NAT cannot support RPC, LDAP and Kerberos traffic.

and the only we
can to the "same" address space is by NAT.

My question is this - what
is the best way to set up DNS to resolve hostnames in company2? Is
there a DNS translate tool out there?

Thanks.

You can create Secondary zones of the other in each respective DNS server,
stub zones, or conditional forwarding.

--
Regards,
Ace

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

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT,
MVP Microsoft MVP - Directory Services
Microsoft Certified Trainer

Infinite Diversities in Infinite Combinations

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[ctvader]

In

Can you elaborate on the following statement please? I am not sure how you
would be using NAT to get to access one subnet to the next, NAT or not, when
they both have identical IP subnets, unless you are accessing the WAN IP of
each other's NAT. Even still, that will not work with cross authentication
since NAT cannot support RPC, LDAP and Kerberos traffic.



You can create Secondary zones of the other in each respective DNS server,
stub zones, or conditional forwarding.

--
Regards,
Ace

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

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT,
MVP Microsoft MVP - Directory Services
Microsoft Certified Trainer

Infinite Diversities in Infinite Combinations

Having difficulty reading or finding responses to your post?
Try using Outlook Express or any other newsreader, configure a news
account, and point it to news.microsoft.com. Anonymous access. It's
easy and it's free:

How to Configure OEx for Internet Newshttp://support.microsoft.com/?id=171164

"Life isn't like a box of chocolates or a bowl of cherries or
peaches... Life is more like a jar of jalapenos. What you do today
may burn your butt tomorrow." - Garfield

Cisco's ASA product will translate an address for but you must use DNS
forwarding. Basically, it takes the FWD and translates into the
address you need. Ex: 10.1.1.21 --> 172.20.1.21. I know my question
was confusing but that only resulted from me being confused.

Thanks.

Jeff

 

[Ace Fekay [MVP]]

In

Cisco's ASA product will translate an address for but you must use DNS
forwarding. Basically, it takes the FWD and translates into the
address you need. Ex: 10.1.1.21 --> 172.20.1.21. I know my question
was confusing but that only resulted from me being confused.

Thanks.

Jeff

I see. I would consult Cisco's documentation on this. But AFAIK and from my
own experience, you will have numerous issues if both subnets are the same
IP subnet.

Ace