pdnsd pdnsd is a proxy DNS server with permanent caching that is designed to cope with unreachable or down DNS servers
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server cache dns server dns name server query dns caching

pdnsd Description

pdnsd is a proxy DNS server with permanent caching that is designed to cope with unreachable or down DNS servers pdnsd is a proxy DNS server with permanent caching (the cache contents are written to hard disk on exit) that is designed to cope with unreachable or down DNS servers (for example in dial-in networking). Since version 1.1.0, pdnsd supports negative caching.pdnsd can be used with applications that do DNS lookups, e.g. on startup, and can't be configured to change that behaviour, to prevent the often minute-long hangs (or even crashes) that result from stalled DNS queries. Some Netscape Navigator versions for Unix, for example, expose this behaviour.pdnsd is configurable via a file and supports run-time configuration using the program pdnsd-ctl that comes with pdnsd. This allows you to set the status flags of servers that pdnsd knows (to influence which servers pdnsd will query), and the addition, invalidation and deletion of DNS records in pdnsd's cache.Parallel name server queries are supported. This is a technique that allows querying several servers at the same time so that very slow or unavailable servers will not block the answer for one timeout interval. Since version 1.0.0, pdnsd has full IPv6 support. What's New in This Release: · In p_exec_query(), if the reply from a remote name server is negative · (either because the rcode is NXDOMAIN or because the answer section · contains no records for the queried name), ignore the remaining records · in the answer section (in particular do not add them to the cache).

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