1 .\" Copyright (c) 2009-2016 Roy Marples
2 .\" All rights reserved
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
13 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 .Nd resolvconf configuration file
33 is the configuration file for
37 file is a shell script that is sourced by
41 must contain valid shell commands.
42 Listed below are the standard
44 variables that may be set.
45 If the values contain whitespace, wildcards or other special shell characters,
46 ensure they are quoted and escaped correctly.
49 variable for an example on quoting.
51 After updating this file, you may wish to run
53 to apply the new configuration.
55 When a dynamically generated list is appended or prepended to, the whole
56 is made unique where left-most wins.
57 .Sh RESOLVCONF OPTIONS
58 .Bl -tag -width indent
62 from running any subscribers.
64 .It Sy interface_order
65 These interfaces will always be processed first.
66 If unset, defaults to the following:-
69 These interfaces will be processed next, unless they have a metric.
70 If unset, defaults to the following:-
71 .D1 tap[0-9]* tun[0-9]* vpn vpn[0-9]* ppp[0-9]* ippp[0-9]*
72 .It Sy local_nameservers
73 If unset, defaults to the following:-
74 .D1 127.* 0.0.0.0 255.255.255.255 ::1
76 Prepend search domains to the dynamically generated list.
77 .It Sy search_domains_append
78 Append search domains to the dynamically generated list.
79 .It Sy domain_blacklist
80 A list of domains to be removed from consideration.
81 To remove a domain, you can use foo.*
82 To remove a sub domain, you can use *.bar
84 Prepend name servers to the dynamically generated list.
85 You should set this to 127.0.0.1 if you use a local name server other than
87 .It Sy name_servers_append
88 Append name servers to the dynamically generated list.
89 .It Sy name_server_blacklist
90 A list of name servers to be removed from consideration.
91 The default is 0.0.0.0 as some faulty routers send it via DHCP.
92 To remove a block, you can use 192.168.*
93 .It Sy private_interfaces
94 These interfaces name servers will only be queried for the domains listed
96 Useful for VPN domains.
98 .Sy private_interfaces Ns ="*"
99 will stop the forwarding of the root zone and allows the local resolver to
100 recursively query the root servers directly.
101 Requires a local nameserver other than libc.
102 This is equivalent to the
106 Is a space separated list of replacement keywords. The syntax is this:
107 .Va $keyword Ns / Ns Va $match Ns / Ns Va $replacement
109 Example, given this resolv.conf:
111 .D1 search foo.org dead.beef
112 .D1 nameserver 1.2.3.4
113 .D1 nameserver 2.3.4.5
114 and this configuaration:
115 .D1 replace="search/foo*/bar.com nameserver/1.2.3.4/5.6.7.8 nameserver/2.3.4.5/"
116 you would get this resolv.conf instead:
119 .D1 nameserver 5.6.7.8
121 Works the same way as
123 except it works on each space separated value rather than the whole line,
124 so it's useful for the replacing a single domain within the search directive.
125 Using the same example resolv.conf and changing
129 you would get this resolv.conf instead:
131 .D1 search bar.com dead.beef
132 .D1 nameserver 5.6.7.8
134 Override the default state directory of
136 This should not be changed once
138 is in use unless the old directory is copied to the new one.
141 The following variables affect
144 .Bl -tag -width indent
149 .It Sy resolv_conf_options
150 A list of libc resolver options, as specified in
152 .It Sy resolv_conf_passthrough
153 When set to YES the latest resolv.conf is written to
155 without any alteration.
156 When set to /dev/null or NULL,
157 .Sy resolv_conf_local_only
159 .Sy local_nameservers
160 is unset unless overridden and only the information set in
164 .It Sy resolv_conf_sortlist
165 A libc resolver sortlist, as specified in
167 .It Sy resolv_conf_local_only
168 If a local name server is configured then the default is just to specify that
169 and ignore all other entries as they will be configured for the local
171 Set this to NO to also list non-local nameservers.
172 This will give you working DNS even if the local nameserver stops functioning
173 at the expense of duplicated server queries.
174 .It Sy append_nameservers
175 Append name servers to the dynamically generated list.
176 .It Sy prepend_nameservers
177 Prepend name servers to the dynamically generated list.
179 Append search domains to the dynamically generated list.
180 .It Sy prepend_search
181 Prepend search domains to the dynamically generated list.
183 .Sh SUBSCRIBER OPTIONS
184 openresolv ships with subscribers for the name servers
190 Each subscriber can create configuration files which should be included in
191 in the subscribers main configuration file.
193 To disable a subscriber, simply set it's name to NO.
194 For example, to disable the libc subscriber you would set:
196 .Bl -tag -width indent
198 This file tells dnsmasq which name servers to use for specific domains.
199 .It Sy dnsmasq_resolv
200 This file tells dnsmasq which name servers to use for global lookups.
202 Example resolvconf.conf for dnsmasq:
203 .D1 name_servers=127.0.0.1
204 .D1 dnsmasq_conf=/etc/dnsmasq-conf.conf
205 .D1 dnsmasq_resolv=/etc/dnsmasq-resolv.conf
207 Example dnsmasq.conf:
208 .D1 listen-address=127.0.0.1
209 .D1 # If dnsmasq is compiled for DBus then we can take
210 .D1 # advantage of not having to restart dnsmasq.
212 .D1 conf-file=/etc/dnsmasq-conf.conf
213 .D1 resolv-file=/etc/dnsmasq-resolv.conf
215 Include this file in the named options block.
216 This file tells named which name servers to use for global lookups.
218 Include this file in the named global scope, after the options block.
219 This file tells named which name servers to use for specific domains.
221 Example resolvconf.conf for named:
222 .D1 name_servers=127.0.0.1
223 .D1 named_options=/etc/named-options.conf
224 .D1 named_zones=/etc/named-zones.conf
228 .D1 listen-on { 127.0.0.1; };
229 .D1 include "/etc/named-options.conf";
231 .D1 include "/etc/named-zones.conf";
233 This is the main pdnsd configuration file which we modify to add our
235 If this variable is not set then we rely on the pdnsd configuration file
240 This file tells pdnsd about global name servers.
241 If this variable is not set then it's written to
244 Example resolvconf.conf for pdnsd:
245 .D1 name_servers=127.0.0.1
246 .D1 pdnsd_conf=/etc/pdnsd.conf
247 .D1 # pdnsd_resolv=/etc/pdnsd-resolv.conf
251 .D1 server_ip = 127.0.0.1;
255 .D1 # A server definition is required, even if emtpy.
258 .D1 # file="/etc/pdnsd-resolv.conf";
261 This file tells unbound about specific and global name servers.
262 .It Sy unbound_insecure
263 When set to YES, unbound marks the domains as insecure, thus ignoring DNSSEC.
265 Example resolvconf.conf for unbound:
266 .D1 name_servers=127.0.0.1
267 .D1 unbound_conf=/etc/unbound-resolvconf.conf
269 Example unbound.conf:
270 .D1 include: /etc/unbound-resolvconf.conf
272 .Sh SUBSCRIBER INTEGRATION
273 Not all distributions store the files the subscribers need in the same
275 For example, named service scripts have been called named, bind and rc.bind
276 and they could be located in a directory called /etc/rc.d, /etc/init.d or
278 Each subscriber attempts to automatically configure itself, but not every
279 distribution has been catered for.
280 Also, users could equally want to use a different version from the one
281 installed by default, such as bind8 and bind9.
282 To accommodate this, the subscribers have these files in configurable
283 variables, documented below.
285 .Bl -tag -width indent
286 .It Sy dnsmasq_service
287 Location of the dnsmasq service.
288 .It Sy dnsmasq_restart
289 Command to restart the dnsmasq service.
291 Location of the dnsmasq pidfile.
293 Location of the libc service.
295 Command to restart the libc service.
297 Location of the named service.
299 Command to restart the named service.
301 Command to restart the pdnsd service.
302 .It Sy unbound_service
303 Location of the unbound service.
304 .It Sy unbound_restart
305 Command to restart the unbound service.
307 Location of the unbound pidfile.
315 .An Roy Marples Aq Mt roy@marples.name
317 Each distribution is a special snowflake and likes to name the same thing
318 differently, namely the named service script.
320 Please report them to
321 .Lk http://roy.marples.name/projects/openresolv