DNS - Unexplained Behaviour

Posted on 2004-11-12
Last Modified: 2010-03-18
Hi All

I have two Windows 2003 servers operating within my LAN, each with static IPs (*.*.*.7 -a domain controller and *.*.*.8 -the PDC).  The PDC is where we have configured the DNS zone, a copy is being replicated onto the DC

For the PDC, I have the DNS server set to *.*.*.8 (its own address), while for the other DC, I have the PDC's IP.  My DHCP service is provided by my Netscreen firewall, and there we have identified the DC's IP as the DNS server.

My problem is that over the last six months we have had a recurring situation where one or both of the machines loses its ability to surf the internet.  Investigations show that they are not able to ping externally by IP or by name.  We have found that the situation is resolved simply by changing the static IP to some other number within the range.

Why should this be happening?  We are not making any changes to the DNS configuration and cannot identify anything which might trigger the loss of this service

Question by:briteeyez
    1 Comment
    LVL 18

    Accepted Solution

    Configure the scope of the dhcp server not to include the dc's addresses. And better go to domain integrated dhcp and disable the dhcp of the netscreen firewall.


    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    What Should I Do With This Threat Intelligence?

    Are you wondering if you actually need threat intelligence? The answer is yes. We explain the basics for creating useful threat intelligence.

    Enterprise networks where VoIP phones have been deployed frequently use port configurations that allow both a computer and an IP phone to be plugged into the same switch port but use different VLANs. On Cisco equipment I'm referring to the "native V…
    The Need In an Active Directory enviroment, the PDC emulator provide time synchronization for the domain. This is important since Active Directory uses Kerberos for authentication.  By default, if the time difference between systems is off by more …
    This video is in connection to the article "The case of a missing mobile phone (". It will help one to understand clearly the steps to track a lost android phone.
    Internet Business Fax to Email Made Easy - With eFax Corporate (, you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

    779 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

    10 Experts available now in Live!

    Get 1:1 Help Now