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Windows Server 2008 R2 Thread, DNS Problem Server 2008 R2 in Technical; Hi peeps i urgently need help. I have one domain server within my school this server has: DNS DHCP AD ...
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    phillip_croxford's Avatar
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    DNS Problem Server 2008 R2

    Hi peeps

    i urgently need help.

    I have one domain server within my school
    this server has:

    DNS
    DHCP
    AD
    File Services
    Print and Document Services
    and Group policy


    im having problems with my dns and i dont know what else to do. ive checked everything over and seems ok

    Ive noticed random problems with my clients around school network wise
    ive first discovered it was a DNS problem when i look in event viewer today

    now if i goto DNS server console

    expand DNS

    expand my server name in my case pvserver-a

    expand Forward Lookup Zones

    then right click on pennineview.local (My domain name)

    choose properties

    then in the next window of pennineview.local properties
    i choose the name servers tab

    its showing ip address unknown for the FQDN
    dns 2.jpg

    now if i edit that it shows this
    dns 3.jpg
    "for the protection of my network and the council ive hidden most the ip address from the picture!"

    ive run a dcdiag.exe

    and got this result
    dns.jpg

    can any one help me???

    ive looked in dhcp and seems ok, any ideas

  2. #2

    Michael's Avatar
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    If you re-add your server on the Forward Lookup - add the FQDN servername.domain.domain and your server IP manually and it should resolve your problem. You need to do the same for Reverse Lookup too. As to why this has happened it's unclear.

    Report back with your results.

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    phillip_croxford's Avatar
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    thanks michael. i was scratching my head too. im going to have to do this after school has finished! from what i can gather i will have to delete the whole zone and recreate is that what you are saying

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    Michael's Avatar
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    No you shouldn't need to do that. Highlight the nameserver and click Edit, then re-enter the required info on both Forward and Reverse Lookup zones. No server reboot will be required and your clients should start working again pretty quickly, unless there are any other issues.

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    phillip_croxford's Avatar
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    right ive done what you said im now getting these problems!! ??? im so lost right now i dont know what is going off lol

    dns 4.jpg
    dns 5.jpg

    i hope you can still help??? im thinking maybe start DNS all over again if its going to be this much trouble!

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    Michael's Avatar
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    I presume DNS is running or at the very least you can quickly stop and start it the service again. You've got nothing to lose but sort it now as users are probably unable to logon.

  7. Thanks to Michael from:

    phillip_croxford (18th May 2012)

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    phillip_croxford's Avatar
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    Good news

    i did what you said above and ive resterted both the DNS client and server services and all is well!!! thanks god!

    what the hell has happend to my server ill never know!

    but they all come back ok

    thank you michael!

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    Michael's Avatar
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    Also, looking at your last screenshot, it refers to a suitable time server being unavailable. Is the date/time on the server correct? It also says your PDC is down which is worrying.

    If you reboot the server you may/may not need to perform a system state recovery worse case scenario.

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    Michael's Avatar
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    Quote Originally Posted by phillip_croxford View Post
    Good news

    i did what you said above and ive resterted both the DNS client and server services and all is well!!! thanks god!

    what the hell has happend to my server ill never know!

    but they all come back ok

    thank you michael!
    No problem, but something was clearly broken. Generally speaking if you get users to reboot workstations, they should all 'check in' again and the correct DNS info will be available.

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    phillip_croxford's Avatar
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    well i know about the time server, im going to sort that one out now,
    the PDC im not sure how im going to do this, ive run another DCDIAG.exe and it says the server holding the PDC is down,

    i used to have another server within our school but it went down. this was a few months ago. you dont think its still trying to find the old server is it?? how to i get this server to be the PDC server

    sorry to be a noob but i dont do DNS and i hate messing with it, im fine with everything except DNS!!! its my worse nightmare

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    Michael's Avatar
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    PDC or Primary Domain Controller. This is basically where the FSMO roles are hosted (all 5 of them). This is the same for 2000, 2003/R2 and 2008/R2.

    I'm guessing your server is already a GC (Global Catalog) otherwise it wouldn't be able to process logons at all. Seeing as you have one server all these roles should be on your current server. If they're not, you have two options:

    - Either bring the old server back online and transfer the roles (as it says on the link)
    - Seize the roles, although this should be the last step you take (only if required)

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    phillip_croxford's Avatar
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    the old server cannot be brought back online as the motherboard was at fault and the hard drives have been wiped!

    i can say that the old server looking back wasnt deleted from the domain as it was never brough back online

    so it will have to be the last option

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    Michael's Avatar
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    So if you follow the link I posted, start in Active Directory, right click your domain name and select 'Operations Masters'. If you click on these tabs (in turn) does the servername read your old one or your existing server?

    These are three out of the five and as you can see, it's not difficult to do. From what you're saying though, the old server was simply cut off your domain which is a big no no.

    - As a general rule (I've always done this), all FSMO roles should be transfered from an old to a new server.
    - Then you run dcpromo and demote the old server as a DC. All other critical domain information will then be copied over.
    - Then demote the server from the domain completely and it's job done.

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    phillip_croxford's Avatar
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    right i can say that both tabs RID, PDC and infrastructure read my server name

    also if you look at my dns entrys for this you can see it says my current DNS server too
    dns6.jpg

    sorry to be a pain!

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    Michael's Avatar
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    The DNS problem is fixed (as far as I can tell). What about the other two roles?

    Open up Active Directory Domains and Trusts > Operations Masters and then the last role, Start > Run:

    Code:
    regsvr32 schmmgmt.dll
    Then Start > Run > MMC > File > Add/Remove Snap in > Active Directory Schema > Operations Masters

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