Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

need help urgent (DNS problem)

Discussion in 'Bind/DNS/Nameserver' started by approx, May 17, 2007.

  1. approx

    approx Well-Known Member

    Joined:
    Mar 6, 2007
    Messages:
    59
    Likes Received:
    0
    Trophy Points:
    156
    Hi all,

    I got DNS clustering problem on my servers. I always receive this error
    Code:
    zone xxxxxxx.xxx/IN: zone serial has gone backwards
    The DNS always changed about 10 mins interval. Can someone please tell me what happend?

    Thank you before
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  2. visiox

    visiox Well-Known Member

    Joined:
    Jan 19, 2004
    Messages:
    49
    Likes Received:
    0
    Trophy Points:
    156
    hi there,

    that means that the serial number of your master is lower than the one in the slave server.
    In that case (in most cases) the slave server doesn't care about updates from the master.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. approx

    approx Well-Known Member

    Joined:
    Mar 6, 2007
    Messages:
    59
    Likes Received:
    0
    Trophy Points:
    156
    Hi,

    I'm using clustered DNS. I already changed the serials to 2007051801. Then the serials goes back to 2007151002 again. Any solution?
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  4. visiox

    visiox Well-Known Member

    Joined:
    Jan 19, 2004
    Messages:
    49
    Likes Received:
    0
    Trophy Points:
    156
    Well...

    ...bind-manual...

    The solution to this is to add 2147483647 (2^31-1) to the number, reload the zone and make sure all slaves have updated to the new zone serial number, then reset the number to what you want it to be, and reload the zone again.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  5. approx

    approx Well-Known Member

    Joined:
    Mar 6, 2007
    Messages:
    59
    Likes Received:
    0
    Trophy Points:
    156
    you didn't get what i mean. it's clustered dns. not just master and slave. all zone already syncronized, but after 5 - 15 mins, it says that the serials going backwards on /var/log/messages
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  6. visiox

    visiox Well-Known Member

    Joined:
    Jan 19, 2004
    Messages:
    49
    Likes Received:
    0
    Trophy Points:
    156
    Ah, ok, sorry.

    Hmm... how about some more information? Maybe it will help.
    How many servers are in your cluster? which one is getting the message? how about some logfile entrys? named.conf?

    i guess that one of these servers should have an log entry with a error message beside "zone serial has gone backwards". maybe a firewall issue in some strange kind? "trusted" acl ?
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  7. jrehmer

    jrehmer Well-Known Member

    Joined:
    Apr 10, 2003
    Messages:
    287
    Likes Received:
    0
    Trophy Points:
    166
    Location:
    Denver, CO


    You have your answer, 2007151002 is greater than 2007051801 therefore it will always copy the "newer" version. Find the server that has the 2007151002 version and modify it.
     
  8. approx

    approx Well-Known Member

    Joined:
    Mar 6, 2007
    Messages:
    59
    Likes Received:
    0
    Trophy Points:
    156
    lol sorry wrong typing.. i mean 200705 not 15
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
Loading...

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice