pdnsd is a Proxy DNS server for Linux and FreeBSD that is designed to cope with unreacheable nameservers (e.g. because the dial-in link is not up) in a graceful manner to prevent DNS-dependent applications like Netscape from hanging. It has a permanent disk cache (i.e. the cache contents are saved in a file on exit) and supports parallel query and a wide variety of link uptests. It also has the ability to serve some types of locally defined records.
|Operating Systems||POSIX BSD FreeBSD Linux Windows Windows Cygwin Mac OS X|
Release Notes: This release has support for many additional RR types, including those needed for DNSSEC (though the resolver in pdnsd itself is not yet security aware). Caching data structures are more efficient when storing only the most commonly used RR types. Pdnsd now has support for EDNS (Extension mechanisms for DNS), enabling UDP messages larger than 512 bytes. New configuration options allow local TXT records to be defined and provide a fix for certain types of query uptest failures. Bugs fixed include a UDP socket descriptor leak that affected FreeBSD users and an IPv6 port binding bug.
Release Notes: The main new feature of this version is automatic discovery of root servers. There are also some improvements in the resolver and a new default setting for the neg_rrs_pol configuration option.
Release Notes: This version fixes some security problems. It contains a fix for a "dangling pointer" bug that could cause pdnsd to crash when it received a long reply. It also addresses some of the issues raised in the CERT vulnerability note VU#800113 by making source port randomization the default. This release also fixes problems with compiling pdnsd for the ARM architecture and for the Darwin platform (Max OS X). There are a number of (minor) new features, such as support for "include" files.
Release Notes: A bug has been fixed that caused pdnsd to handle NXDOMAIN replies inefficiently. The code that implements the ping test has been fixed for 64-bit systems. A new option can be used to give each server in a section of the configuration file an equal chance of being queried. New options make it possible to check whether the replies of name servers contain certain IP addresses and if so reject these replies. The pdnsd-ctl 'add' commands now allow multiple IP addresses to be specified for the same name. pdnsd's ability to resolve from root servers has been improved.
Release Notes: This release introduces a new query method: "udp_tcp". With this method, a UDP query is tried first and, if the UDP answer is truncated, the query is repeated using TCP. There is a new configuration option "use_nss", which can be turned off to prevent lengthy timeouts and stalls in certain situations. A bug has been fixed that previously could cause pdnsd to crash when started in debug mode.