+ Post New Thread
Results 1 to 14 of 14
Wireless Networks Thread, DNS Server with wrong records in Technical; Hi all (have searched - cant find) We are experiencing a weird problem where DNS records do not match PC's, ...
  1. #1
    fooby's Avatar
    Join Date
    Dec 2005
    Posts
    351
    Thank Post
    0
    Thanked 5 Times in 4 Posts
    Rep Power
    20

    DNS Server with wrong records

    Hi all

    (have searched - cant find)

    We are experiencing a weird problem where DNS records do not match PC's, an example of which is PC-01 resolves to 1.2.3.4 and PC-02 resolves to 1.2.3.4 (example addresses) there are also problems where PC-03 resolves to an IP address somewhere else.

    We are noticing this more with classroom management systems, where i monitor in a room, say ROOM1 and the pc are sequentially numbered ROOM1-01 -02 -03 etc some of these machines for example ROOM1-08 will resolve the wrong address and actually show me ROOM2-24.

    Im reasonably sure its my DNS servers, so is there a way to safely wipe all the computer records so that they can be re created correctly? Has anyone else had weird issues like this?

    I think all I would need to do is wipe all the A records for the pc's but i dont want to trash my domain.

    any help would be appreciated

    fooby

  2. #2

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,850
    Thank Post
    110
    Thanked 598 Times in 514 Posts
    Blog Entries
    1
    Rep Power
    227

    Re: DNS Server with wrong records

    Enable scavenging.

  3. #3
    fooby's Avatar
    Join Date
    Dec 2005
    Posts
    351
    Thank Post
    0
    Thanked 5 Times in 4 Posts
    Rep Power
    20

    Re: DNS Server with wrong records

    I had thought I had done that, I will check over all the settings, as you are correct, scavenging should have fixed this.

    fooby

  4. #4

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,850
    Thank Post
    110
    Thanked 598 Times in 514 Posts
    Blog Entries
    1
    Rep Power
    227

    Re: DNS Server with wrong records

    Your scavenging timeouts and dhcp lease times are probably different.

  5. #5

    Join Date
    Oct 2006
    Posts
    106
    Thank Post
    9
    Thanked 3 Times in 3 Posts
    Rep Power
    17

    Re: DNS Server with wrong records

    Should they be the same Geoff

  6. #6

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,850
    Thank Post
    110
    Thanked 598 Times in 514 Posts
    Blog Entries
    1
    Rep Power
    227

    Re: DNS Server with wrong records

    Yes. If your scavanging time is longer than your leases then you'll get duplicate records. If it's shorter, you'll lose active records.

  7. #7
    bizzel's Avatar
    Join Date
    Jul 2007
    Location
    Cambridge
    Posts
    654
    Thank Post
    102
    Thanked 204 Times in 72 Posts
    Rep Power
    52

    Re: DNS Server with wrong records

    Do they have to be the same even if dhcp is updating dns? Because our dhcp lease time is one day and scavenging is every 7, however the dhcp server is set to update / remove dns records when it removes leases. I did find over 15 duplicate records in dns last night though... :cry:

  8. #8
    bizzel's Avatar
    Join Date
    Jul 2007
    Location
    Cambridge
    Posts
    654
    Thank Post
    102
    Thanked 204 Times in 72 Posts
    Rep Power
    52

    Re: DNS Server with wrong records

    The RM tech sounded genuinely terrified when I told him our lease time was 1 day. I'm not sure who set that but it's now 1 week, same as the scavenge interval.

  9. #9

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,850
    Thank Post
    110
    Thanked 598 Times in 514 Posts
    Blog Entries
    1
    Rep Power
    227

    Re: DNS Server with wrong records

    If machines crash, or are taken off the network never to return, you can get duplicates that way.

  10. #10
    fooby's Avatar
    Join Date
    Dec 2005
    Posts
    351
    Thank Post
    0
    Thanked 5 Times in 4 Posts
    Rep Power
    20

    Re: DNS Server with wrong records

    Yep

    We have done that a few times :-S

    fooby

  11. #11
    fooby's Avatar
    Join Date
    Dec 2005
    Posts
    351
    Thank Post
    0
    Thanked 5 Times in 4 Posts
    Rep Power
    20

    Re: DNS Server with wrong records

    Last scavenge I did, scavenged 250 ish records....I figure that is bad :S

    fooby

  12. #12

    Join Date
    Sep 2006
    Location
    Essex
    Posts
    786
    Thank Post
    1
    Thanked 34 Times in 32 Posts
    Rep Power
    24

    Re: DNS Server with wrong records

    Have you ghosted anything recently?

  13. #13
    fooby's Avatar
    Join Date
    Dec 2005
    Posts
    351
    Thank Post
    0
    Thanked 5 Times in 4 Posts
    Rep Power
    20

    Re: DNS Server with wrong records

    Yep.
    Loads.

    fooby

  14. #14

    Join Date
    Sep 2006
    Location
    Essex
    Posts
    786
    Thank Post
    1
    Thanked 34 Times in 32 Posts
    Rep Power
    24

    Re: DNS Server with wrong records

    That could explain why you had so many strange DNS records.



SHARE:
+ Post New Thread

Similar Threads

  1. Replies: 17
    Last Post: 20th December 2007, 08:05 PM
  2. Public Records
    By mattx in forum General Chat
    Replies: 3
    Last Post: 21st November 2007, 01:00 AM
  3. Question about DNS records
    By Kyle in forum Windows
    Replies: 1
    Last Post: 20th May 2007, 12:21 PM
  4. MX records - setup help
    By pooley in forum Windows
    Replies: 3
    Last Post: 23rd June 2006, 03:15 PM
  5. Manually adding records to DNS server
    By fooby in forum Wireless Networks
    Replies: 22
    Last Post: 20th January 2006, 10:17 AM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •