Anything can be "tunneled". In this case, restrict DNS to specific servers (internal and/or external) to prevent rouge connections.
-- Espi On Fri, Oct 16, 2015 at 7:59 PM, Richard Stovall <[email protected]> wrote: > I had not heard of this before. > > https://zeltser.com/c2-dns-tunneling/ > > How in the world can most SMBs ever begin to beat back this kind of stuff? >
