Written by the colorful and sometimes controversial Dr. Daniel J. Bernstein, who also created the qmail program, djbdns is a package of modular DNS programs created out of a dissatisfaction with what Dr. Bernstein felt were incessant and overly frequent security flaws found in BIND (then in version 4 and later 8).
The authoritative nameserver component of the package is tinydns. The recursor is dnscache. This is unlike BIND, which can be configured to run as authoritative, or configured as a resolver, or misconfigured to run as both.
djbdns is a nice, tight modular package and is generally secure. It doesn't typically use BIND-style zone transfers (AXFR or IXFR) but recommends to sync its data across nodes via rsync over ssh.
There are components to execute AXFR zone transfers to facilitate inter-operations with BIND and other nameserver types.
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