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pdnsd is a proxy dns server with permanent caching (the cache contents are
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written to hard disk on exit) that is designed to cope with unreachable or
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down dns servers (for example in dial-in networking).
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pdnsd can be used with applications that do dns lookups, eg on startup, and
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can't be configured to change that behavior, to prevent the often minute-long
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hangs (or even crashes) that result from stalled dns queries. Some Netscape
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Navigator versions for Unix, for example, expose this behavior.
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pdnsd is configurable via a file and supports run-time configuration using the
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program pdnsd-ctl that comes with pdnsd. This allows you to set the status
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flags of servers that pdnsd knows (to influence which servers pdnsd will
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query), and the addition, deletion and invalidation of DNS records in pdnsd's
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cache.
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Parallel name server queries are supported. This is a technique that allows
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querying several servers at the same time so that very slow or unavailable
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servers will not block the answer for one timeout interval.
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Since version 1.0.0, pdnsd has full IPv6 support.
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WWW: http://home.t-online.de/home/Moestl/
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Roman Shterenzon <roman@xpert.com>
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