Re: weaknesses in dns label decoding,

From: Brett Glass (brettat_private)
Date: Thu Jun 03 1999 - 05:20:41 PDT

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    Many sysadmins disable BIND's "check-names" option because
    their less knowledgeable colleagues assign illegal names. In
    particular, many use underscores in system names, even though
    they're verboten.
    
    BIND *should* have a separate option that allows underscores
    in names to accommodate this frequent glitch, but it doesn't.
    So, the checking becomes all-or-nothing.
    
    --Brett
    
    At 11:00 PM 6/2/99 +0200, Pavel Kankovsky wrote:
    >On Mon, 31 May 1999, bobk wrote:
    >
    > > Another thing to remember is that it is possible to put ABSOLUTELY
    > > ANYTHING inside a DNS domain name. This includes whitespace, control
    > > characters, and even NULL.
    >
    >Use BIND's check-names option to refuse illegal answers.
    >
    >--Pavel Kankovsky aka Peak  [ Boycott Microsoft--http://www.vcnet.com/bms ]
    >"NSA GCHQ KGB CIA nuclear conspiration war weapon spy agent... Hi Echelon!"
    



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