Upgrade to BIND versions 9.9.1, 9.8.3, 9.7.6, and 9.6-ESV-R7,
the latest from ISC. These versions all contain the following:
* BIND now recognizes the TLSA resource record type, created to
support IETF DANE (DNS-based Authentication of Named Entities)
* The locking strategy around the handling of iterative queries
has been tuned to reduce unnecessary contention in a multi-
Each version also contains other critical bug fixes.
All BIND users are encouraged to upgrade to these latest versions.