Forward DNS problem

Posted on 2006-05-19
Last Modified: 2010-03-19
For some reasons, few of our windows XP workstation computers vanished from the Forward lookup zones but still show on the Reverse lookup zones. We have to manually enter them on the forward lookup zones.
Any ideas what could cause this problem. The event viewer on the workstations and server don't report anything.

Question by:tshi5791
    LVL 48

    Expert Comment

    Hi tshi5791,

    are you clients pointing only towards your DNS server for DNS

    Author Comment

    yes, they all use DHCP and the DHCP only has one DNS server that is the DC.
    LVL 8

    Accepted Solution

    Is automatic scavaging setup?  right click at the server level and go to properties.  Look under advanced.

    Author Comment

    Yes, but this seems to affect only few workstations.
    LVL 77

    Expert Comment

    by:Rob Williams
    If using DHCP, right clicking on the scope in the DHCP console and choosing properties. Under the DNS tab try checking:
    -Enable DNS dynamic updates according to the settings below
    -always dynamically update DNS A and PTR records
    -discard A and PTR records when lease is disabled

    If using static (not a bad idea even with DHCP), make sure network cards, under advanced TCP/IP properties, on the DNS tab, have "Register this connections addresses in DNS" checked. Make sure this is checked on the problematic workstations for sure.

    Author Comment

    uncheck automatic scavanging and things seem to be working fine.

    Featured Post

    Do You Know the 4 Main Threat Actor Types?

    Do you know the main threat actor types? Most attackers fall into one of four categories, each with their own favored tactics, techniques, and procedures.

    Join & Write a Comment

    This is an article about my experiences with remote access to my clients (so that I may serve them) and eventually to my home office system via Radmin Remote Control. I have been using remote access for over 10 years and have been improving my metho…
    Configuring network clients can be a chore, especially if there are a large number of them or a lot of itinerant users.  DHCP dynamically manages this process, much to the relief of users and administrators alike!
    After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
    Here's a very brief overview of the methods PRTG Network Monitor ( offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

    729 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

    15 Experts available now in Live!

    Get 1:1 Help Now