BIND 9

BIND 9 at a glance

BIND 9 is the reference DNS server software, running a large share of the internet's name resolution — authoritative and recursive. The ISC ships regular releases across maintained branches plus coordinated security advisories; as critical, internet-facing infrastructure, BIND advisories deserve prompt attention.

For admins BIND usually comes from the distribution, which backports fixes — for the regular BIND security advisories (many are remotely triggerable denial-of-service), confirm the patched package is installed and named restarted. Harden the configuration: restrict recursion and zone transfers, avoid being an open resolver, and consider response-rate limiting. Track the branch you run and its end-of-life, since ISC maintains specific stable and extended-support branches. After updating, verify that resolution and zone serving work. DNS outages cascade, so test carefully. Patchletter surfaces new BIND releases so its frequent security advisories aren't missed.