• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 4122
  • Last Modified:

nslookup shows unknown server when IPv6 protocol enabled on SBS2008 server

We have just migrated an sbs2003 to sbs2008, and when we ran nslookup on the sbs2008, we got an unknown server message and what looks like an IPv6 address.

If I dissable the IPv6 protocol on the sbs2008 network card it works fine.

We have installed several SBS servers now, and can't remember having to do this before.

Can anyone advise how to fix this, why it happens and what are the implications of running with IPv6 dissabled on the new SBS2008 server.

Any ideas?

Thanks.
0
nigelbeatson
Asked:
nigelbeatson
  • 4
  • 2
1 Solution
 
aoakeleyCommented:
Do not disable IP6 on an sbs server, it will break a lot of things.

If you use NSLOOKUP from a host that supports IPv6 then the IPv6 address will be returned, if you do it from an IPv4 host, then the IPv4 address will be returned. This is by design.

Andy
0
 
aoakeleyCommented:
0
 
nigelbeatsonAuthor Commented:
OK Thanks. I have just checked one of our other servers and you are correct, it does respond with the IPv6 details.

However, both of these servers also say that the server is unknown along with the IPv6 address.

Is this this normal, as it feels to me that there is something wrong?

If I enter the names of the server and IP adresses it comes back with the correct information along with the server unknown and IPv6 address info.

Can you confirm whether this is correct?
0
Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

 
aoakeleyCommented:
Can you post a screenshot of the nslookup?
If i understand what you are saying.... I think you are saying is that there is no reverse DNS for the IPv6 address. This will not be a concern for the operation of the network.

Andy
0
 
aoakeleyCommented:
Just did this on one of my SBS2008 servers

C:\Users\SysAdmin>nslookup
Default Server:  UnKnown
Address:  fe80::4719:1cb1:4feb:6eac

And confirmed that on a default SBS Server install there is no IPv6 reverse DNS zone. thus the "unknown" response (see attached screenshot).

You could create an ipv6 reverse lookup zone, but if MS did not consider it needed either in the release or in subsequent update I reckon we can not worry about it


Capture.JPG
0
 
nigelbeatsonAuthor Commented:
Once again many thanks.
0

Featured Post

2018 Annual Membership Survey

Here at Experts Exchange, we strive to give members the best experience. Help us improve the site by taking this survey today! (Bonus: Be entered to win a great tech prize for participating!)

  • 4
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now