projects / apple / network_cmds.git / blame
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|---|---|---|
| 89c4ed63 A |
1 | .TH "unbound" "8" "Dec 8, 2014" "NLnet Labs" "unbound 1.5.1" |
| 2 | .\" | |
| 3 | .\" unbound.8 -- unbound manual | |
| 4 | .\" | |
| 5 | .\" Copyright (c) 2007, NLnet Labs. All rights reserved. | |
| 6 | .\" | |
| 7 | .\" See LICENSE for the license. | |
| 8 | .\" | |
| 9 | .\" | |
| 10 | .SH "NAME" | |
| 11 | .B unbound | |
| 12 | \- Unbound DNS validating resolver 1.5.1. | |
| 13 | .SH "SYNOPSIS" | |
| 14 | .B unbound | |
| 15 | .RB [ \-h ] | |
| 16 | .RB [ \-d ] | |
| 17 | .RB [ \-v ] | |
| 18 | .RB [ \-c | |
| 19 | .IR cfgfile ] | |
| 20 | .SH "DESCRIPTION" | |
| 21 | .B Unbound | |
| 22 | is a caching DNS resolver. | |
| 23 | .P | |
| 24 | It uses a built in list of authoritative nameservers for the root zone (.), | |
| 25 | the so called root hints. | |
| 26 | On receiving a DNS query it will ask the root nameservers for | |
| 27 | an answer and will in almost all cases receive a delegation to a top level | |
| 28 | domain (TLD) authoritative nameserver. | |
| 29 | It will then ask that nameserver for an answer. | |
| 30 | It will recursively continue until an answer is found or no answer is | |
| 31 | available (NXDOMAIN). | |
| 32 | For performance and efficiency reasons that answer is cached for a | |
| 33 | certain time (the answer's time\-to\-live or TTL). | |
| 34 | A second query for the same name will then be answered from the cache. | |
| 35 | Unbound can also do DNSSEC validation. | |
| 36 | .P | |
| 37 | To use a locally running | |
| 38 | .B Unbound | |
| 39 | for resolving put | |
| 40 | .sp | |
| 41 | .RS 6n | |
| 42 | nameserver 127.0.0.1 | |
| 43 | .RE | |
| 44 | .sp | |
| 45 | into | |
| 46 | .IR resolv.conf (5). | |
| 47 | .P | |
| 48 | If authoritative DNS is needed as well using | |
| 49 | .IR nsd (8), | |
| 50 | careful setup is required because authoritative nameservers and | |
| 51 | resolvers are using the same port number (53). | |
| 52 | .P | |
| 53 | The available options are: | |
| 54 | .TP | |
| 55 | .B \-h | |
| 56 | Show the version and commandline option help. | |
| 57 | .TP | |
| 58 | .B \-c\fI cfgfile | |
| 59 | Set the config file with settings for unbound to read instead of reading the | |
| 60 | file at the default location, /usr/local/etc/unbound/unbound.conf. The syntax is | |
| 61 | described in \fIunbound.conf\fR(5). | |
| 62 | .TP | |
| 63 | .B \-d | |
| 64 | Debug flag: do not fork into the background, but stay attached to | |
| 65 | the console. This flag will also delay writing to the log file until | |
| 66 | the thread\-spawn time, so that most config and setup errors appear on | |
| 67 | stderr. If given twice or more, logging does not switch to the log file | |
| 68 | or to syslog, but the log messages are printed to stderr all the time. | |
| 69 | .TP | |
| 70 | .B \-v | |
| 71 | Increase verbosity. If given multiple times, more information is logged. | |
| 72 | This is in addition to the verbosity (if any) from the config file. | |
| 73 | .SH "SEE ALSO" | |
| 74 | \fIunbound.conf\fR(5), | |
| 75 | \fIunbound\-checkconf\fR(8), | |
| 76 | \fInsd\fR(8). | |
| 77 | .SH "AUTHORS" | |
| 78 | .B Unbound | |
| 79 | developers are mentioned in the CREDITS file in the distribution. |