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Thread: BIND9 client update denied

  1. #1
    Join Date
    Apr 2012
    Beans
    76
    Distro
    Ubuntu 14.04 Trusty Tahr

    BIND9 client update denied

    Hello All,

    I am running BIND9 on Ubuntu Server 12.04. /var/log/syslog constantly reports entries similar to the following (where 192.168.1.100 represents the ip address of one of my dhcp clients and "ubuntuserver" is the DNS Server's hostname):


    Code:
    Jun 14 20:44:50 myubuntuserver named[19501]: client 192.168.1.100#50131: update 'example.local/IN' denied
    I had initially thought that the errors were due to the fact that there is no secondary server so I added the following to my named.conf.options file:

    Code:
    allow-transfer {"none";};
    That did not resolve the issue. Please help.

    Thanks.

  2. #2
    Join Date
    Apr 2012
    Beans
    76
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: BIND9 client update denied

    No worries. I have found out what causes it, and will need to read more about finding a solution. Here is why the message comes up:

    Code:
    Q: 	
    I keep getting log messages like the following. Why?
    
    Jun 21 12:00:00.000 client 10.0.0.1#1234: update denied
    
    A: 	
    Someone is trying to update your DNS data using the RFC2136 Dynamic Update
    protocol. Windows 2000 machines have a habit of sending dynamic update
    requests to DNS servers without being specifically configured to do so. If
    the update requests are coming from a Windows 2000 machine, see
    http://support.microsoft.com/support/kb/articles/q246/8/04.asp for
    information about how to turn them off.
    Reference: http://www.bind9.net/BIND-FAQ

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