In yet another episode recorded with Matt and Cricket in the same room, they offer their opinions on two security-related topics: TSIG, including when to use it and whether it’s still worthwhile with DNSSEC-signed zones; and the benefits and drawbacks of using split namespaces.  Along the way, they attempt to determine – using nothing but their wits, logical extrapolation and haphazard guessing – how a new feature of BIND 9.6 must work.