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+# BIND 9
+
+[BIND (Berkeley Internet Name Domain)](https://www.isc.org/downloads/bind/doc/) is a complete, highly portable
+implementation of the DNS (Domain Name System) protocol.
+
+Internet Systems Consortium
+([https://www.isc.org](https://www.isc.org)), a 501(c)(3) public benefit
+corporation dedicated to providing software and services in support of the
+Internet infrastructure, developed BIND 9 and is responsible for its
+ongoing maintenance and improvement.
+
+More details about upstream project can be found on their
+[gitlab](https://gitlab.isc.org/isc-projects/bind9). This repository contains
+only upstream sources and packaging instructions for
+[Fedora Project](https://fedoraproject.org).
+
+## Subpackages
+
+The package contains several subpackages, some of them can be disabled on rebuild.
+
+* **bind** -- *named* daemon providing DNS server
+* **bind-utils** -- set of tools to analyse DNS responses or update entries (dig, host)
+* **bind-doc** -- documentation for current bind, *BIND 9 Administrator Reference Manual*.
+* **bind-license** -- Shared license for all packages but bind-export-libs.
+* **bind-sdb** -- *named* daemon built with support for [Dynamically Loadable Zones](http://bind-dlz.sourceforge.net/), interface to serve DNS names from external databases like LDAP or SQL. Can be disabled by `--without SDB`.
+* **bind-pkcs11** -- *named* daemon built with native PKCS#11 support. Can be disabled by `--without PKCS11`.
+* **bind-libs** and **bind-libs-lite** -- Shared libraries used by some others programs
+* **bind-export-libs** -- Special subset of libraries without support for threads. Used by *dhcp* package. Can be disabled by `--without EXPORT_LIBS`
+* **bind-devel** -- Development headers for libs. Can be disabled by `--without DEVEL`
+
+
+## Optional features
+
+* *GSSTSIG* -- Support for Kerberos authentication in BIND.
+* *LMDB* -- Support for dynamic database for managing runtime added zones. Provides faster removal of added zone with much less overhead. But requires lmdb linked to base libs.
+* *DLZ* -- Support for dynamic loaded modules providing support for features *bind-sdb* provides, but only small module is required.