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25 .Dd May 14, 2015
26 .Dt RESOLVCONF.CONF 5
27 .Os
28 .Sh NAME
29 .Nm resolvconf.conf
30 .Nd resolvconf configuration file
31 .Sh DESCRIPTION
32 .Nm
33 is the configuration file for
34 .Xr resolvconf 8 .
35 The
36 .Nm
37 file is a shell script that is sourced by
38 .Xr resolvconf 8 ,
39 meaning that
40 .Nm
41 must contain valid shell commands.
42 Listed below are the standard
43 .Nm
44 variables that may be set.
45 If the values contain white space for special shell characters,
46 ensure they are quoted and escaped correctly.
47 .Pp
48 After updating this file, you may wish to run
49 .Nm resolvconf -u
50 to apply the new configuration.
51 .Pp
52 When a dynamically generated list is appended or prepended to, the whole
53 is made unique where left-most wins.
54 .Sh RESOLVCONF OPTIONS
55 .Bl -tag -width indent
56 .It Sy resolvconf
57 Set to NO to disable
58 .Nm resolvconf
59 from running any subscribers.
60 Defaults to YES.
61 .It Sy interface_order
62 These interfaces will always be processed first.
63 If unset, defaults to the following:-
64 .D1 lo lo[0-9]*
65 .It Sy dynamic_order
66 These interfaces will be processed next, unless they have a metric.
67 If unset, defaults to the following:-
68 .D1 tap[0-9]* tun[0-9]* vpn vpn[0-9]* ppp[0-9]* ippp[0-9]*
69 .It Sy local_nameservers
70 If unset, defaults to the following:-
71 .D1 127.* 0.0.0.0 255.255.255.255 ::1
72 .It Sy search_domains
73 Prepend search domains to the dynamically generated list.
74 .It Sy search_domains_append
75 Append search domains to the dynamically generated list.
76 .It Sy domain_blacklist
77 A list of domains to be removed from consideration.
78 To remove a domain, you can use foo.*
79 To remove a sub domain, you can use *.bar
80 .It Sy name_servers
81 Prepend name servers to the dynamically generated list.
82 You should set this to 127.0.0.1 if you use a local name server other than
83 libc.
84 .It Sy name_servers_append
85 Append name servers to the dynamically generated list.
86 .It Sy name_server_blacklist
87 A list of name servers to be removed from consideration.
88 The default is 0.0.0.0 as some faulty routers send it via DHCP.
89 To remove a block, you can use 192.168.*
90 .It Sy private_interfaces
91 These interfaces name servers will only be queried for the domains listed
92 in their resolv.conf.
93 Useful for VPN domains.
94 Setting
95 .Sy private_interfaces Ns ="*"
96 will stop the forwarding of the root zone and allows the local resolver to
97 recursively query the root servers directly.
98 Requires a local nameserver other than libc.
99 This is equivalent to the
100 .Nm resolvconf -p
101 option.
102 .It Sy replace
103 Is a space separated list of replacement keywords. The syntax is this:
104 .Va $keyword Ns / Ns Va $match Ns / Ns Va $replacement
105 .Pp
106 Example, given this resolv.conf:
107 .D1 domain foo.org
108 .D1 search foo.org dead.beef
109 .D1 nameserver 1.2.3.4
110 .D1 nameserver 2.3.4.5
111 and this configuaration:
112 .D1 replace="search/foo*/bar.com nameserver/1.2.3.4/5.6.7.8 nameserver/2.3.4.5/"
113 you would get this resolv.conf instead:
114 .D1 domain foo.org
115 .D1 search bar.com
116 .D1 nameserver 5.6.7.8
117 .It Sy replace_sub
118 Works the same way as
119 .Sy replace
120 except it works on each space separated value rather than the whole line,
121 so it's useful for the replacing a single domain within the search directive.
122 Using the same example resolv.conf and changing
123 .Sy replace
124 to
125 .Sy replace_sub ,
126 you would get this resolv.conf instead:
127 .D1 domain foo.org
128 .D1 search bar.com dead.beef
129 .D1 nameserver 5.6.7.8
130 .It Sy state_dir
131 Override the default state directory of
132 .Pa @VARDIR@ .
133 This should not be changed once
134 .Nm resolvconf
135 is in use unless the old directory is copied to the new one.
136 .El
137 .Sh LIBC OPTIONS
138 The following variables affect
139 .Xr resolv.conf 5
140 directly:-
141 .Bl -tag -width indent
142 .It Sy resolv_conf
143 Defaults to
144 .Pa /etc/resolv.conf
145 if not set.
146 .It Sy resolv_conf_options
147 A list of libc resolver options, as specified in
148 .Xr resolv.conf 5 .
149 .It Sy resolv_conf_passthrough
150 When set to YES the latest resolv.conf is written to
151 .Sy resolv_conf
152 without any alteration.
153 When set to /dev/null or NULL,
154 .Sy resolv_conf_local_only
155 is defaulted to NO,
156 .Sy local_nameservers
157 is unset unless overridden and only the information set in
158 .Nm
159 is written to
160 .Sy resolv_conf .
161 .It Sy resolv_conf_sortlist
162 A libc resolver sortlist, as specified in
163 .Xr resolv.conf 5 .
164 .It Sy resolv_conf_local_only
165 If a local name server is configured then the default is just to specify that
166 and ignore all other entries as they will be configured for the local
167 name server.
168 Set this to NO to also list non-local nameservers.
169 This will give you working DNS even if the local nameserver stops functioning
170 at the expense of duplicated server queries.
171 .It Sy append_nameservers
172 Append name servers to the dynamically generated list.
173 .It Sy prepend_nameservers
174 Prepend name servers to the dynamically generated list.
175 .It Sy append_search
176 Append search domains to the dynamically generated list.
177 .It Sy prepend_search
178 Prepend search domains to the dynamically generated list.
179 .El
180 .Sh SUBSCRIBER OPTIONS
181 openresolv ships with subscribers for the name servers
182 .Xr dnsmasq 8 ,
183 .Xr named 8 ,
184 .Xr pdnsd 8
185 and
186 .Xr unbound 8 .
187 Each subscriber can create configuration files which should be included in
188 in the subscribers main configuration file.
189 .Pp
190 To disable a subscriber, simply set it's name to NO.
191 For example, to disable the libc subscriber you would set:
192 .D1 libc=NO
193 .Bl -tag -width indent
194 .It Sy dnsmasq_conf
195 This file tells dnsmasq which name servers to use for specific domains.
196 .It Sy dnsmasq_resolv
197 This file tells dnsmasq which name servers to use for global lookups.
198 .Pp
199 Example resolvconf.conf for dnsmasq:
200 .D1 name_servers=127.0.0.1
201 .D1 dnsmasq_conf=/etc/dnsmasq-conf.conf
202 .D1 dnsmasq_resolv=/etc/dnsmasq-resolv.conf
203 .Pp
204 Example dnsmasq.conf:
205 .D1 listen-address=127.0.0.1
206 .D1 # If dnsmasq is compiled for DBus then we can take
207 .D1 # advantage of not having to restart dnsmasq.
208 .D1 enable-dbus
209 .D1 conf-file=/etc/dnsmasq-conf.conf
210 .D1 resolv-file=/etc/dnsmasq-resolv.conf
211 .It Sy named_options
212 Include this file in the named options block.
213 This file tells named which name servers to use for global lookups.
214 .It Sy named_zones
215 Include this file in the named global scope, after the options block.
216 This file tells named which name servers to use for specific domains.
217 .Pp
218 Example resolvconf.conf for named:
219 .D1 name_servers=127.0.0.1
220 .D1 named_options=/etc/named-options.conf
221 .D1 named_zones=/etc/named-zones.conf
222 .Pp
223 Example named.conf:
224 .D1 options {
225 .D1 listen-on { 127.0.0.1; };
226 .D1 include "/etc/named-options.conf";
227 .D1 };
228 .D1 include "/etc/named-zones.conf";
229 .It Sy pdnsd_conf
230 This is the main pdnsd configuration file which we modify to add our
231 forward domains to.
232 If this variable is not set then we rely on the pdnsd configuration file
233 setup to read
234 .Pa pdnsd_resolv
235 as documented below.
236 .It Sy pdnsd_resolv
237 This file tells pdnsd about global name servers.
238 If this variable is not set then it's written to
239 .Pa pdnsd_conf .
240 .Pp
241 Example resolvconf.conf for pdnsd:
242 .D1 name_servers=127.0.0.1
243 .D1 pdnsd_conf=/etc/pdnsd.conf
244 .D1 # pdnsd_resolv=/etc/pdnsd-resolv.conf
245 .Pp
246 Example pdnsd.conf:
247 .D1 global {
248 .D1 server_ip = 127.0.0.1;
249 .D1 status_ctl = on;
250 .D1 }
251 .D1 server {
252 .D1 # A server definition is required, even if emtpy.
253 .D1 label="empty";
254 .D1 proxy_only=on;
255 .D1 # file="/etc/pdnsd-resolv.conf";
256 .D1 }
257 .It Sy unbound_conf
258 This file tells unbound about specific and global name servers.
259 .It Sy unbound_insecure
260 When set to YES, unbound marks the domains as insecure, thus ignoring DNSSEC.
261 .Pp
262 Example resolvconf.conf for unbound:
263 .D1 name_servers=127.0.0.1
264 .D1 unbound_conf=/etc/unbound-resolvconf.conf
265 .Pp
266 Example unbound.conf:
267 .D1 include: /etc/unbound-resolvconf.conf
268 .El
269 .Sh SUBSCRIBER INTEGRATION
270 Not all distributions store the files the subscribers need in the same
271 locations.
272 For example, named service scripts have been called named, bind and rc.bind
273 and they could be located in a directory called /etc/rc.d, /etc/init.d or
274 similar.
275 Each subscriber attempts to automatically configure itself, but not every
276 distribution has been catered for.
277 Also, users could equally want to use a different version from the one
278 installed by default, such as bind8 and bind9.
279 To accommodate this, the subscribers have these files in configurable
280 variables, documented below.
281 .Pp
282 .Bl -tag -width indent
283 .It Sy dnsmasq_service
284 Location of the dnsmasq service.
285 .It Sy dnsmasq_restart
286 Command to restart the dnsmasq service.
287 .It Sy dnsmasq_pid
288 Location of the dnsmasq pidfile.
289 .It Sy libc_service
290 Location of the libc service.
291 .It Sy libc_restart
292 Command to restart the libc service.
293 .It Sy named_service
294 Location of the named service.
295 .It Sy named_restart
296 Command to restart the named service.
297 .It Sy pdnsd_restart
298 Command to restart the pdnsd service.
299 .It Sy unbound_service
300 Location of the unbound service.
301 .It Sy unbound_restart
302 Command to restart the unbound service.
303 .It Sy unbound_pid
304 Location of the unbound pidfile.
305 .El
306 .Sh SEE ALSO
307 .Xr resolv.conf 5 ,
308 .Xr resolvconf 8
309 and
310 .Xr sh 1 .
311 .Sh AUTHORS
312 .An Roy Marples Aq Mt roy@marples.name
313 .Sh BUGS
314 Each distribution is a special snowflake and likes to name the same thing
315 differently, namely the named service script.
316 .Pp
317 Please report them to
318 .Lk http://roy.marples.name/projects/openresolv