NAME¶
pdns_recursor - high-performance, simple and secure recursing nameserver
SYNOPSIS¶
pdns_recursor [
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:
# pdns_recursor --local-address=192.0.2.53 --allow-from=192.0.2.0/24 --daemon
To stop the recursor by hand, run:
# 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/
- --allow-from=NETWORK[,NETWORK]...
- If set, only allow these comma separated NETWORKs, with network
mask to recurse. For example: 192.0.2.0/24,203.0.113.128/25.
- --auth-zones=ZONENAME=FILENAME[,ZONENAME=FILENAME]...
- Serve ZONENAME from FILENAME authoritatively. For example:
ds9a.nl=/var/zones/ds9a.nl,powerdns.com=/var/zones/powerdns.com.
- --chroot=DIRECTORY
- chroot the process to DIRECTORY.
- --client-tcp-timeout=NUM
- Timeout in seconds when talking to TCP clients.
- --config-dir=DIRECTORY
- Location of configuration directory (recursor.conf), the default depends
on the SYSCONFDIR option at build-time, which is usually /etc/powerdns.
The default can be found with
pdns_recursor --config | grep ' config-dir='.
- --daemon
- Operate as a daemon.
- --delegation-only
- Which domains we only accept delegations from (a Verisign special).
- --entropy-source=FILE
- Read new entropy from FILE, defaults to /dev/urandom.
- --export-etc-hosts
- If set, this flag will export the hostnames and IP addresses mentioned in
/etc/hosts.
- --forward-zones=ZONENAME=ADDRESS[,ZONENAME=ADDRESS]...
- Queries for ZONENAME will be forwarded to ADDRESS.
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=FILENAME
- Similar to --forward-zones, but read the options from
FILENAME. FILENAME should contain one zone per line, like:
ds9a.nl=213.244.168.210.
- --help
- Show a summary of options.
- --hint-file=FILENAME
- Load root hints from this FILENAME
- --local-address=ADDRESS[,ADDRESS]...
- Listen on ADDRESS, separated by spaces or commas.
- --local-port=PORT
- Listen on PORT.
- --log-common-errors
- If we should log rather common errors.
- --max-cache-entries=NUM
- Maximum number of entries in the main cache.
- --max-negative-ttl=NUM
- maximum number of seconds to keep a negative cached entry in memory.
- --max-tcp-clients=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=ADDRESS
- Use ADDRESS as Source IP address when sending queries.
- --query-local-address6=ADDRESS
- Send out local IPv6 queries from ADDRESS. Disabled by default,
which also disables outgoing IPv6 support. A useful setting is '::0'.
- --quiet
- Suppress logging of questions and answers.
- --server-id=TEXT
- Return TEXT when queried for 'server.id' 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=GID
- If set, change group id to GID for more security.
- --setuid=UID
- If set, change user id to UID for more security.
- --single-socket
- If set, only use a single socket for outgoing queries.
- --socket-dir=DIRECTORY
- The controlsocket will live in DIRECTORY.
- --spoof-nearmiss-max=NUM
- If non-zero, assume spoofing after this many near misses.
- --trace
- if we should output heaps of logging.
- --version-string=TEXT
- 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.