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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 allow_interfaces
65 If set, only these interfaces will be processed.
66 .It Sy deny_interfaces
67 If set, these interfaces will not be processed.
68 .It Sy interface_order
69 These interfaces will always be processed first.
70 If unset, defaults to the following:-
71 .Bd -compact -literal -offset indent
75 These interfaces will be processed next, unless they have a metric.
76 If unset, defaults to the following:-
77 .Bd -compact -literal -offset indent
78 tap[0-9]* tun[0-9]* vpn vpn[0-9]* wg[0-9]* ppp[0-9]* ippp[0-9]*
80 .It Sy inclusive_interfaces
81 Ignore any exclusive marking for these interfaces.
82 This is handy when 3rd party integrations force the
84 option and you want to disable it easily.
85 .It Sy local_nameservers
86 If unset, defaults to the following:-
87 .Bd -compact -literal -offset indent
88 127.* 0.0.0.0 255.255.255.255 ::1
91 Prepend search domains to the dynamically generated list.
92 .It Sy search_domains_append
93 Append search domains to the dynamically generated list.
94 .It Sy domain_blacklist
95 A list of domains to be removed from consideration.
96 To remove a domain, you can use foo.*
97 To remove a sub domain, you can use *.bar
99 Prepend name servers to the dynamically generated list.
100 You should set this to 127.0.0.1 if you use a local name server other than
102 .It Sy name_servers_append
103 Append name servers to the dynamically generated list.
104 .It Sy name_server_blacklist
105 A list of name servers to be removed from consideration.
106 The default is 0.0.0.0 as some faulty routers send it via DHCP.
107 To remove a block, you can use 192.168.*
108 .It Sy private_interfaces
109 These interfaces name servers will only be queried for the domains listed
110 in their resolv.conf.
111 Useful for VPN domains.
113 .Sy private_interfaces Ns ="*"
114 will stop the forwarding of the root zone and allows the local resolver to
115 recursively query the root servers directly.
116 Requires a local nameserver other than libc.
117 This is equivalent to the
120 .It Sy public_interfaces
121 Force these interface to be public, overriding the private marking.
122 This is handy when 3rd party integrations force the
124 option and you want to disable it easily.
126 Is a space separated list of replacement keywords.
128 .Va $keyword Ns / Ns Va $match Ns / Ns Va $replacement
130 Example, given this resolv.conf:
131 .Bd -compact -literal -offset indent
133 search foo.org dead.beef
137 and this configuration:
138 .Bd -compact -literal -offset indent
139 replace="search/foo*/bar.com"
140 replace="$replace nameserver/1.2.3.4/5.6.7.8"
141 replace="$replace nameserver/2.3.4.5/"
143 you would get this resolv.conf instead:
144 .Bd -compact -literal -offset indent
150 Works the same way as
152 except it works on each space separated value rather than the whole line,
153 so it's useful for the replacing a single domain within the search directive.
154 Using the same example resolv.conf and changing
158 you would get this resolv.conf instead:
159 .Bd -compact -literal -offset indent
161 search bar.com dead.beef
165 Override the default state directory of
167 This should not be changed once
169 is in use unless the old directory is copied to the new one.
172 The following variables affect
175 .Bl -tag -width indent
180 .It Sy resolv_conf_options
181 A list of libc resolver options, as specified in
183 .It Sy resolv_conf_passthrough
184 When set to YES the latest resolv.conf is written to
186 without any alteration.
187 When set to /dev/null or NULL,
188 .Sy resolv_conf_local_only
190 .Sy local_nameservers
191 is unset unless overridden and only the information set in
195 .It Sy resolv_conf_sortlist
196 A libc resolver sortlist, as specified in
198 .It Sy resolv_conf_local_only
199 If a local name server is configured then the default is just to specify that
200 and ignore all other entries as they will be configured for the local
202 Set this to NO to also list non-local nameservers.
203 This will give you working DNS even if the local nameserver stops functioning
204 at the expense of duplicated server queries.
205 .It Sy append_nameservers
206 Append name servers to the dynamically generated list.
207 .It Sy prepend_nameservers
208 Prepend name servers to the dynamically generated list.
210 Append search domains to the dynamically generated list.
211 .It Sy prepend_search
212 Prepend search domains to the dynamically generated list.
213 .It Sy resolv_conf_mv
217 is updated by writing to a temporary file and then moving it
218 vs writing directly to it.
220 .Sh SUBSCRIBER OPTIONS
221 openresolv ships with subscribers for the name servers
225 .Xr pdns_recursor 1 ,
228 Each subscriber can create configuration files which should be included in
229 the subscribers main configuration file.
231 To disable a subscriber, simply set its name to NO.
232 For example, to disable the libc subscriber you would set:
233 .Bd -compact -literal -offset indent
236 .Bl -tag -width indent
238 This file tells dnsmasq which name servers to use for specific domains.
239 .It Sy dnsmasq_resolv
240 This file tells dnsmasq which name servers to use for global lookups.
242 Example resolvconf.conf for dnsmasq:
243 .Bd -compact -literal -offset indent
244 name_servers=127.0.0.1
245 dnsmasq_conf=/etc/dnsmasq-conf.conf
246 dnsmasq_resolv=/etc/dnsmasq-resolv.conf
249 Example dnsmasq.conf:
250 .Bd -compact -literal -offset indent
251 listen-address=127.0.0.1
252 # If dnsmasq is compiled for DBus then we can take
253 # advantage of not having to restart dnsmasq.
255 conf-file=/etc/dnsmasq-conf.conf
256 resolv-file=/etc/dnsmasq-resolv.conf
259 Include this file in the named options block.
260 This file tells named which name servers to use for global lookups.
262 Include this file in the named global scope, after the options block.
263 This file tells named which name servers to use for specific domains.
265 Example resolvconf.conf for named:
266 .Bd -compact -literal -offset indent
267 name_servers=127.0.0.1
268 named_options=/etc/named-options.conf
269 named_zones=/etc/named-zones.conf
273 .Bd -compact -literal -offset indent
275 listen-on { 127.0.0.1; };
276 include "/etc/named-options.conf";
279 include "/etc/named-zones.conf";
282 This is the main pdnsd configuration file which we modify to add our
284 If this variable is not set then we rely on the pdnsd configuration file
289 This file tells pdnsd about global name servers.
290 If this variable is not set then it's written to
293 Example resolvconf.conf for pdnsd:
294 .Bd -compact -literal -offset indent
295 name_servers=127.0.0.1
296 pdnsd_conf=/etc/pdnsd.conf
297 # pdnsd_resolv=/etc/pdnsd-resolv.conf
301 .Bd -compact -literal -offset indent
303 server_ip = 127.0.0.1;
307 # A server definition is required, even if empty.
310 # file="/etc/pdnsd-resolv.conf";
314 This file tells pdns_recursor about specific and global name servers.
316 Example resolvconf.conf for pdns_recursor:
317 .Bd -compact -literal -offset indent
318 name_servers=127.0.0.1
319 pdns_zones=/etc/pdns/recursor-zones.conf
322 Example recursor.conf:
323 .Bd -compact -literal -offset indent
324 allow-from=127.0.0.0/8, ::1/128
325 forward-zones-file=/etc/pdns/recursor-zones.conf
328 This file tells unbound about specific and global name servers.
329 .It Sy unbound_insecure
330 When set to YES, unbound marks the domains as insecure, thus ignoring DNSSEC.
331 .It Sy unbound_forward_zone_options
332 Options appended to each forward zone.
333 Each option should be separated by an embedded new line.
335 Example resolvconf.conf for unbound:
336 .Bd -compact -literal -offset indent
337 name_servers=127.0.0.1
338 unbound_conf=/etc/unbound-resolvconf.conf
341 Example unbound.conf:
342 .Bd -compact -literal -offset indent
343 include: /etc/unbound-resolvconf.conf
346 .Sh SUBSCRIBER INTEGRATION
347 Not all distributions store the files the subscribers need in the same
349 For example, named service scripts have been called named, bind and rc.bind
350 and they could be located in a directory called /etc/rc.d, /etc/init.d or
352 Each subscriber attempts to automatically configure itself, but not every
353 distribution has been catered for.
354 Also, users could equally want to use a different version from the one
355 installed by default, such as bind8 and bind9.
356 To accommodate this, the subscribers have these files in configurable
357 variables, documented below.
358 .Bl -tag -width indent
359 .It Sy dnsmasq_service
360 Name of the dnsmasq service.
361 .It Sy dnsmasq_restart
362 Command to restart the dnsmasq service.
364 Location of the dnsmasq pidfile.
366 Name of the libc service.
368 Command to restart the libc service.
370 Name of the named service.
372 Command to restart the named service.
374 Command to restart the pdnsd service.
376 Command to restart the pdns_recursor service.
378 Command to restart the pdns_recursor service.
379 .It Sy unbound_service
380 Name of the unbound service.
381 .It Sy unbound_restart
382 Command to restart the unbound service.
384 Location of the unbound pidfile.
391 .An Roy Marples Aq Mt roy@marples.name
393 Each distribution is a special snowflake and likes to name the same thing
394 differently, namely the named service script.
396 Please report them to
397 .Lk https://roy.marples.name/projects/openresolv