sql2data fetches DNS information from an SQL database and dumps then in tinydns-data format into the file 'data'. Additional static DNS data from the text file static_data are copied into 'data'. sql2data optionally executes 'make' upon successful export/dump. Backups can be made to the files old_data and good_data.cdb. Optionally, DNS NOTIFY packets may be sent to the different nameservers referenced for the different zones.
PowerDNS Authoritative Server is a high-performance authoritative nameserver with a host of backends. Besides plain BIND configuration files, PDNS reads information from MySQL, Oracle, PostgreSQL, SQLite, MongoDB, and many other databases. Backends can easily be written in any language, and a sample Perl backend is provided. PDNS powers around 30-40% of all domain names in many parts of the world, including >90% of all DNSSEC domains in Europe.
PHP Net_IDNA is a class to convert between the Punycode and Unicode formats. Punycode is a standard described in RFC 3492 and part of IDNA (Internationalizing Domain Names in Applications [RFC3490]) . This class allows PHP scripts to convert these domain names without having one of the PHP extensions installed. It supports both IDNA 2003 and IDNA 2008.
With a small codebase, the PowerDNS Recursor is an advanced resolver currently serving the DNS resolving needs of over 80 million Internet connections. Besides high performance (using kqueue or epoll, over 100 thousand qps on commodity hardware), it provides advanced anti-spoofing measures. In addition, the program caches server performance and timeouts, making it both network and user friendly. It also has built-in hooks for making graphs with rrdtool, providing insight into nameserver performance.
PHREL is a per host rate limiter. It will track the rate of incoming traffic on a server and insert a chain into iptables when a configured threshold is crossed. The inserted chain may either rate limit or block the offending host for a period of time. The inserted chain is automatically removed when the offending host's traffic levels return to normal. PHREL is particularly well suited to protecting nameservers (DNS) from random hosts that flood requests, and to preventing SSH brute force login attempts.
Dual DHCP DNS Server is a DHCP server combined with a caching DNS server that is sensitive to the names that were allocated by the DHCP server. It has built in dynamic updates, and also supports BOOTP PXE network booting and client specific options. It is self-configuring, doesn't require the creation of zone files, and uses little memory and CPU time. Either one of the two services can be turned off.