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Turn on or enable BIND DNS server logging to see all queries or for troubleshooting problem

Q. How do I turn on DNS server logging so that I can see all the queries on my CentOS 4.0 server?

A. You can use rndc command which controls the operation of a name server. It supersedes the ndc utility that was provided in old BIND releases. If rndc is invoked with no command line options or arguments, it prints a short summary of the supported commands and the available options and their arguments.

rndc communicates with the name server over a TCP connection, sending commands authenticated with digital signatures. In the current versions of rndc and named named the only supported authentication algorithm is HMAC-MD5, which uses a shared secret on each end of the connection. This provides TSIG-style authentication for the command request and the name server\u2019s response. All commands sent over the channel must be signed by a key_id known to the server.

Task: Turn on logging

Type the following command as root to toggle query logging:
# rndc querylog

Task: View bind sever query log

Once this is done, you can view all logged queries usimg /var/log/messages file. To view those queries, type:
# tail -f /var/log/messages

Task: Turn off logging

Type the following command as root to toggle query logging:
# rndc querylog

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{ 8 comments… add one }

  • Scott December 10, 2010, 8:27 pm

    Perfect! Thanks!

  • Prasad Chandorkar March 1, 2012, 7:55 am

    True

    Thanks a lot.

  • Talk May 30, 2012, 5:51 am

    Thanks a lot for this hint!!!

  • Alparslan August 6, 2012, 1:44 pm

    is there any program or service to monitoring witch domain name is used and querying by any client.

    I want to a linux bind9 dns query log analyser etc.

  • tonic January 9, 2013, 1:25 pm

    In the case of debian system like mine (wheezy), I had to tail /var/log/syslog instead of /var/log/messages :)

    • Sayantan Khan June 16, 2014, 11:52 am

      Thanks a lot for that debian specific information.

  • Tony June 11, 2014, 3:57 pm

    Excellent, thank you so much!

  • Tony June 26, 2014, 9:43 pm

    Thank you!!!

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