Which DNS server are my clients resolving against ?

Posted on 2007-07-20
Last Modified: 2010-05-18
Config - 5 DC's all DNS & GC's.  3 are w2k 2 are w2k3.  Clients mainly XP some w2k, approx 2500 nodes

Is it possible to identify which DNS server my clients are resolving against?  Like in WINS having the owner.  I ask because I want to remove 2 of the W2k DC's which are currently set to primary & secondary DNS on nodes that have DHCP configured, so this process is straight forward.  But I know that there will be nodes out there that have not been made DHCP so I need to get an idea of what clients are resolving where before I start.
Question by:coch
    LVL 11

    Assisted Solution

    Hi the one which is set as the primary DNS is always the once resolving and registring for clients. go to the command prompt and then type nslookup and then may be you type any pc name see which is the ip resolving then that is the one which is resolving.  if not you can go to command prompt and then type ipconfig /all to see the primary dns. if not you can also go to your DHCP and check which is the primary and secondary set for the user.

    Hope this helps
    LVL 23

    Assisted Solution

    Your DHCP clients ar easy just do what Kamal suggests because DHCP clients always get the primary & secondary DNS server with the DHCP scoope. But if you have clients that have fixed IP and DNS hardcoded then you might need to go to them and see which DNS server they are resolving to.

    You should be able to find your fixed IP clients by comparing the DHCP lease with the scoope.

    Author Comment

    ormerodrutter - Can you explain how I would compare the DHCP lease with the scope please
    LVL 18

    Accepted Solution

    If you have lots of clients and you don't know which ones are DHCP and which are static then you could capture the DNS traffic on the DCs you want to decommission and see what clients are using them.
    Filter everything but port 53.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Highfive + Dolby Voice = No More Audio Complaints!

    Poor audio quality is one of the top reasons people don’t use video conferencing. Get the crispest, clearest audio powered by Dolby Voice in every meeting. Highfive and Dolby Voice deliver the best video conferencing and audio experience for every meeting and every room.

    I know all systems administrator at some time or another has had to create a script to copy file from a server share to a desktop. Well now there is an easy way to do this in Group Policy. Using Group policy preferences is not hard. The first thing …
    Companies that have implemented Microsoft’s Active Directory need to ensure that the Active Directory is configured and operating properly. If there are issues found and not resolved, it eventually leads the components to fail or stop working and fi…
    This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles from a Windows Server 2008 domain controller to a Windows Server 2012 domain controlle…
    This tutorial will walk an individual through the process of configuring their Windows Server 2012 domain controller to synchronize its time with a trusted, external resource. Use Google, Bing, or other preferred search engine to locate trusted NTP …

    737 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    18 Experts available now in Live!

    Get 1:1 Help Now