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+Use cases (examples)
+====================
+
+Dynamic DNS Service discovery (DNS-SD_)
+-------------------------------------------
+Synchronized with database engine, for example *MySQL*. 
+
+.. _DNS-SD: http://www.dns-sd.org/
+
+Firewall control
+----------------
+Control firewall (e.g. enable incomming SSH connection) with DNS query signed with private key. 
+So firewall can blocks every service during normal operation.
+
+Scriptable DNS-based blacklist (DNS-BL_)
+-------------------------------------------
+Scripted in Python with already provided features, takes advantage of DNS reply, because
+almost every mail server supports DNS based blacklisting.
+
+.. _DNS-BL: http://www.dnsbl.org
+
+DNS based Wake-On-Lan
+---------------------
+Controled by secured queries secured with private key.
+
+Dynamic translation service
+---------------------------
+DNS request can be translated to virtualy any answer, that's easy to implement in client side
+because of many DNS libraries available.
+
+Examples :
+ * **Dictionary** - using *IDN* for non-ascii strings transfer, ``dig TXT slovo.en._dict_.nic.cz`` returns translation of "slovo" to EN.
+ * **Translation** - Extends *DNS-SD*, for example DNS to Jabber to find out people logged in.
+ * **Exchange rate calculator** - ``dig TXT 1000.99.czk.eur._rates_.nic.cz`` returns the given sum (1000.99 CZK) in EURs.
+
+Dynamic ENUM service 
+--------------------
+Support for redirection, synchronization, etc.