Deadwood is a fully recursive DNS cache. This is a DNS server with the
following features:
* Full support for both DNS recursion and DNS forwarding caching
* Small size and memory footprint suitable for embedded systems
* Simple and clean codebase
* Secure design
* Spoof protection: Strong cryptography used to determine the
Query ID and source port
* Ability to read and write the cache to a file
* Dynamic cache that deletes entries not recently used
* Ability to use expired entries in the cache when it is
impossible to contact upstream DNS servers.
* Both DNS-over-UDP and DNS-over-TCP are handled by the same daemon
* Built-in dnswall functionality