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bug in DNS clustering

Discussion in 'Bind/DNS/Nameserver' started by cyberspirit, Apr 4, 2004.

  1. cyberspirit

    cyberspirit BANNED

    Jun 27, 2003
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    Here is what I found setting up DNS clustering.

    Lets say I have server and
    I went into WHM on G and set up clustering. I copied the access key of A into the interface and voila, the clustering is set up. I choose "synchronise changes" in the interface and everything seems ok.

    I go to A and choose clustering as well but do not copy any access key in there or do anything else.
    G shows up as "standalone".

    So far everything seems ok, but just wait:

    Now I do a change for a zone on G and it is replicated to A - just as it should be.

    The just to test I go to A and do a change for a zone and guess what?

    The change is replicated to G!!!!!
    This is wrong and should not happen since I chose "standalone" and never even copied an access key of G into the interface on A!!!
    This is a major security bug and should not happen.

    If server A trusts server G then that does not mean G automatically trusts A!!!!!!!

    And it seems the setting of synchronise changes or standalone have no impact whatsoever!

    I highly recommend for Nick to fix this asap!

    So beware doing DNS changes on a standalone server and wonder why they replicate if they should not.
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