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These files were pulled from the 1.6.3 release tarball. This new version builds against OpenSSL version 1.1 which will be the default in the new Debian Stable which is due to be released RealSoonNow (tm).
80 lines
2.3 KiB
Groff
80 lines
2.3 KiB
Groff
.TH "unbound" "8" "Jun 13, 2017" "NLnet Labs" "unbound 1.6.3"
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.\"
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.\" unbound.8 -- unbound manual
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.\"
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.\" Copyright (c) 2007, NLnet Labs. All rights reserved.
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.\"
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.\" See LICENSE for the license.
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.\"
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.\"
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.SH "NAME"
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.B unbound
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\- Unbound DNS validating resolver 1.6.3.
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.SH "SYNOPSIS"
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.B unbound
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.RB [ \-h ]
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.RB [ \-d ]
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.RB [ \-v ]
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.RB [ \-c
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.IR cfgfile ]
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.SH "DESCRIPTION"
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.B Unbound
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is a caching DNS resolver.
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.P
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It uses a built in list of authoritative nameservers for the root zone (.),
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the so called root hints.
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On receiving a DNS query it will ask the root nameservers for
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an answer and will in almost all cases receive a delegation to a top level
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domain (TLD) authoritative nameserver.
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It will then ask that nameserver for an answer.
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It will recursively continue until an answer is found or no answer is
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available (NXDOMAIN).
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For performance and efficiency reasons that answer is cached for a
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certain time (the answer's time\-to\-live or TTL).
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A second query for the same name will then be answered from the cache.
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Unbound can also do DNSSEC validation.
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.P
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To use a locally running
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.B Unbound
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for resolving put
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.sp
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.RS 6n
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nameserver 127.0.0.1
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.RE
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.sp
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into
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.IR resolv.conf (5).
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.P
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If authoritative DNS is needed as well using
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.IR nsd (8),
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careful setup is required because authoritative nameservers and
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resolvers are using the same port number (53).
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.P
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The available options are:
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.TP
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.B \-h
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Show the version and commandline option help.
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.TP
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.B \-c\fI cfgfile
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Set the config file with settings for unbound to read instead of reading the
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file at the default location, @ub_conf_file@. The syntax is
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described in \fIunbound.conf\fR(5).
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.TP
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.B \-d
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Debug flag: do not fork into the background, but stay attached to
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the console. This flag will also delay writing to the log file until
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the thread\-spawn time, so that most config and setup errors appear on
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stderr. If given twice or more, logging does not switch to the log file
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or to syslog, but the log messages are printed to stderr all the time.
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.TP
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.B \-v
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Increase verbosity. If given multiple times, more information is logged.
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This is in addition to the verbosity (if any) from the config file.
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.SH "SEE ALSO"
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\fIunbound.conf\fR(5),
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\fIunbound\-checkconf\fR(8),
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\fInsd\fR(8).
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.SH "AUTHORS"
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.B Unbound
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developers are mentioned in the CREDITS file in the distribution.
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