1Use cases (examples) 2==================== 3 4Dynamic DNS Service discovery (DNS-SD_) 5------------------------------------------- 6Synchronized with database engine, for example *MySQL*. 7 8.. _DNS-SD: http://www.dns-sd.org/ 9 10Firewall control 11---------------- 12Control firewall (e.g. enable incoming SSH connection) with DNS query signed with private key. 13So firewall can blocks every service during normal operation. 14 15Scriptable DNS-based blacklist (DNS-BL_) 16------------------------------------------- 17Scripted in Python with already provided features, takes advantage of DNS reply, because 18almost every mail server supports DNS based blacklisting. 19 20.. _DNS-BL: http://www.dnsbl.org 21 22DNS based Wake-On-Lan 23--------------------- 24Controlled by secured queries secured with private key. 25 26Dynamic translation service 27--------------------------- 28DNS request can be translated to virtually any answer, that's easy to implement in client side 29because of many DNS libraries available. 30 31Examples : 32 * **Dictionary** - using *IDN* for non-ascii strings transfer, ``dig TXT slovo.en._dict_.nic.cz`` returns translation of "slovo" to EN. 33 * **Translation** - Extends *DNS-SD*, for example DNS to Jabber to find out people logged in. 34 * **Exchange rate calculator** - ``dig TXT 1000.99.czk.eur._rates_.nic.cz`` returns the given sum (1000.99 CZK) in EURs. 35 36Dynamic ENUM service 37-------------------- 38Support for redirection, synchronization, etc. 39