[rbldnsd] Warning: possible danger of using rbldnsd, and upcoming data format change

[Matthew Sullivan]

Michael Tokarev wrote:

> There's one possible problem with using rbldnsd and
> ip4set dataset type in particular, which may happen
> due to somehow corrupted input data.  Imagine somehow
> incorrect data transfer, when the input file is
> incomplete, for example, original file contains the
> line
>
>  127.0.0.2
>
> which list a single IPv4 address, but after a failed
> transfer, the line shortened to only one digit:
>
>  1<EOF>
>
> This is valid input for rbldnsd, and it will treat
> such an input as...  1.0.0.0/8!  Or, if the line
> was shortened to
>
>  127.0<EOF>
>
> rbldnsd will assume it is 127.0.0.0/16, and so on.


That would explain the occasional trouble seen by users of SORBS.

/ Mat