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Man Pages


Manual Reference Pages  -  PDNS_RECURSOR (1)

NAME

B]pdns_recursor] - high-performance, simple and secure recursing nameserver

CONTENTS

Synopsis
Description
Examples
Options
Bugs
Resources
See Also
Authors

SYNOPSIS

B]pdns_recursor] [I]OPTION]]...

DESCRIPTION

pdns_recursor(1) is a high performance, simple and secure recursing nameserver. It currently powers over two million internet connections.

The recursor is configured via a configuration file, but each item in that file can be overridden on the command line.

This manpage lists the core set of features needed to get the PowerDNS recursor working, for full and up to date details head to http://doc.powerdns.com/built-in-recursor.html

EXAMPLES

To listen on 192.0.2.53 and allow the 192.0.2.0/24 subnet to recurse, and run as a daemon, execute:

C]# pdns_recursor --local-address=192.0.2.53 --allow-from=192.0.2.0/24 --daemon]

To stop the recursor by hand, run:

C]# rec_control quit]

However, the recommended way of starting and stopping the recursor is to use the init.d script provided.

OPTIONS

For authoritative listing of options, consult the online documentation at http://doc.powerdns.com/md/recursor/settings/
--aaaa-additional-processing
  Turn on to do AAAA additional processing (slow).
--allow-from=I]NETWORK][,I]NETWORK]]...
  If set, only allow these comma separated I]NETWORK]s, with network mask to recurse. For example: 192.0.2.0/24,203.0.113.128/25.
--auth-can-lower-ttl
  Authoritative zones can transmit a TTL value that is lower than that specified in the parent zone. This is called a [aq]delegation inconsistency[aq]. To follow RFC 2181 paragraphs 5.2 and 5.4 to the letter, enable this feature. This will mean a slight deterioration of performance, and it will not solve any problems, but does make the recursor more standards compliant. Not recommended unless you have to tick an [aq]RFC 2181 compliant[aq] box. Off by default.
--auth-zones=I]ZONENAME]=I]FILENAME][,I]ZONENAME]=I]FILENAME]]...
  Serve I]ZONENAME] from I]FILENAME] authoritatively. For example: ds9a.nl=/var/zones/ds9a.nl,powerdns.com=/var/zones/powerdns.com.
--chroot=I]DIRECTORY]
  chroot the process to I]DIRECTORY].
--client-tcp-timeout=I]NUM]
  Timeout in seconds when talking to TCP clients.
--config-dir=I]DIRECTORY]
  Location of configuration directory (recursor.conf), /etc/powerdns by default.
--daemon
  Operate as a daemon.
--delegation-only
  Which domains we only accept delegations from (a Verisign special).
--entropy-source=I]FILE]
  Read new entropy from I]FILE], defaults to /dev/urandom.
--export-etc-hosts
  If set, this flag will export the hostnames and IP addresses mentioned in /etc/hosts.
--fork If set, fork the daemon for possible double performance.
--forward-zones=I]ZONENAME]=I]ADDRESS][,I]ZONENAME]=I]ADDRESS]]...
  Queries for I]ZONENAME] will be forwarded to I]ADDRESS]. I]ADDRESS] should be an IP address, not a hostname (to prevent chicken and egg problems). Example: forward-zones= ds9a.nl=213.244.168.210, powerdns.com=127.0.0.1.
--forward-zones-file=I]FILENAME]
  Similar to I]--forward-zones], but read the options from I]FILENAME]. I]FILENAME] should contain one zone per line, like: ds9a.nl=213.244.168.210.
--help Show a summary of options.
--hint-file=I]FILENAME]
  Load root hints from this I]FILENAME]
--local-address=I]ADDRESS][,I]ADDRESS]]...
  Listen on I]ADDRESS], separated by spaces or commas.
--local-port=I]PORT]
  Listen on I]PORT].
--log-common-errors
  If we should log rather common errors.
--max-cache-entries=I]NUM]
  Maximum number of entries in the main cache.
--max-negative-ttl=I]NUM]
  maximum number of seconds to keep a negative cached entry in memory.
--max-tcp-clients=I]NUM]
  Maximum number of simultaneous TCP clients.
--max-tcp-per-client
  If set, maximum number of TCP sessions per client (IP address).
--query-local-address=I]ADDRESS]
  Use I]ADDRESS] as Source IP address when sending queries.
--query-local-address6=I]ADDRESS]
  Send out local IPv6 queries from I]ADDRESS]. Disabled by default, which also disables outgoing IPv6 support. A useful setting is [aq]::0[aq].
--quiet
  Suppress logging of questions and answers.
--remotes-ringbuffer-entries=I]NUM]
  maximum number of packets to store statistics for.
--server-id=I]TEXT]
  Return I]TEXT] when queried for [aq]server.id[aq] TXT, defaults to hostname.
--serve-rfc1918
  On by default, this makes the server authoritatively aware of: 10.in-addr.arpa, 168.192.in-addr.arpa and 16-31.172.in-addr.arpa, which saves load on the AS112 servers. Individual parts of these zones can still be loaded or forwarded.
--setgid=I]GID]
  If set, change group id to I]GID] for more security.
--setuid=I]UID]
  If set, change user id to I]UID] for more security.
--single-socket
  If set, only use a single socket for outgoing queries.
--socket-dir=I]DIRECTORY]
  The controlsocket will live in I]DIRECTORY].
--spoof-nearmiss-max=I]NUM]
  If non-zero, assume spoofing after this many near misses.
--trace
  if we should output heaps of logging.
--version-string=I]TEXT]
  I]TEXT] will be reported on version.pdns or version.bind queries.

BUGS

None known. File new ones at https://github.com/PowerDNS/pdns/issues.

RESOURCES

Website: http://www.powerdns.com, https://github.com/PowerDNS/pdns

SEE ALSO

rec_control(1)

AUTHORS

PowerDNS.COM BV.
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--> PDNS_RECURSOR (1) March 2008

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