Can we block/detect DNS beacon channels?
gtaylor at tnetconsulting.net
Wed May 2 18:50:38 UTC 2018
On 05/02/2018 12:23 PM, Blason R wrote:
> I would really appreciate if someone can shed light; if DNS based
> advanced attacks can be stopped using DNS RPZ? Like DNS beacon channels
> or Data Exfiltration through DNS queries.
If you know fixed aspects of the queries / responses, you can very
likely filter them with Response Policy Zone.
However I think you will need Response Policy Service to be able to do
more instrumentation / trending / tracking and filtering of unknown
ahead of time aspects.
I think of RPS for DNS much like I think of milters for Sendmail.
It's my understanding that RPS support is in BIND. However I'm not
aware of any free RPS filters. I think there is at least one commercial
Grant. . . .
unix || die
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