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DNS keeps going up and down...

Discussion in 'Bind / DNS / Nameserver Issues' started by nwilkins83, Feb 9, 2014.

  1. nwilkins83

    nwilkins83 Member

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    Hello,

    I have hyperspin setup to monitor my Linux virtual server. The DNS port on Port 53 keeps going down and then comes back up minutes later...

    Where should I begin to trouble shoot this problem?

    What logs should I look at?
    What processes should I be looking for that could cause this?

    Any help appreciated.

    Many Thanks
     
  2. vanessa

    vanessa Well-Known Member
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    Start with /var/log/messages.
     
  3. nwilkins83

    nwilkins83 Member

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    Hi,

    Is there a way I can capture the contents in those logs to paste here?
     
  4. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello :)

    I do not recommend pasting the entire contents of /var/log/messages here. Instead, you should first verify that your Named service is actually failing. Do you notice any other symptoms other than the alert from your monitoring software? For instance, do domain names fail to resolve, or does Chkservd send you any alerts? If so, you can search /var/log/messages using the "grep" command for the date/time that DNS was not responding to see if you notice any specific failures or error messages.

    Thank you.
     
  5. vanessa

    vanessa Well-Known Member
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    Use pastebin or something, after following the recommendation from cpanelmichael. You may want to consider removing any sensitive information.
     
  6. nwilkins83

    nwilkins83 Member

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    Hello,

    Seems it was down to a DDOS attack which is now resolved.

    Many Thanks
     
  7. cPanelPeter

    cPanelPeter Technical Analyst III
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    Hello,

    Glad that it is resolved. Thank you for updating this thread with the outcome.
     
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