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91a44b91 | 1 | .\" Copyright 2006-2009 Roy Marples |
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2 | .\" All rights reserved |
3 | .\" | |
4 | .\" Redistribution and use in source and binary forms, with or without | |
5 | .\" modification, are permitted provided that the following conditions | |
6 | .\" are met: | |
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. | |
12 | .\" | |
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 | |
23 | .\" SUCH DAMAGE. | |
24 | .\" | |
91a44b91 | 25 | .Dd January 1, 2009 |
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26 | .Dt DHCPCD.CONF 5 SMM |
27 | .Sh NAME | |
28 | .Nm dhcpcd.conf | |
29 | .Nd dhcpcd configuration file | |
30 | .Sh DESCRIPTION | |
31 | Although | |
32 | .Nm dhcpcd | |
33 | can do everything from the command line, there are cases where it's just easier | |
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34 | to do it once in a configuration file. |
35 | Most of the options found in | |
ba9dfb7a | 36 | .Xr dhcpcd 8 |
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37 | can be used here. |
38 | The first word on the line is the option and the rest of the line is the value. | |
39 | Leading and trailing whitespace for the option and value are trimmed. | |
40 | You can escape characters in the value using the \\ character. | |
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41 | .Pp |
42 | Blank lines and lines starting with # are ignored. | |
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43 | .Pp |
44 | Here's a list of available options: | |
45 | .Bl -tag -width indent | |
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46 | .It Ic allowinterfaces Ar pattern |
47 | When discovering interfaces, the interface name must match | |
48 | .Ar pattern | |
49 | which is a space or comma separated list of patterns passed to | |
50 | .Xr fnmatch 3 . | |
51 | If the same interface is matched in | |
52 | .Ic denyinterfaces | |
53 | then it is still denied. | |
54 | .It Ic denyinterfaces Ar pattern | |
55 | When discovering interfaces, the interface name must not match | |
56 | .Ar pattern | |
57 | which is a space or comma separated list of patterns passed to | |
58 | .Xr fnmatch 3 . | |
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59 | .It Ic background |
60 | Background immediately. | |
61 | This is useful for startup scripts which don't disable link messages for | |
62 | carrier status. | |
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63 | .It Ic blacklist Ar address |
64 | Ignores all DHCP messages which have this | |
65 | .Ar address | |
66 | as the server ID. | |
67 | This may be expanded in future releases to ignore all packets | |
68 | matching either the IP or hardware | |
69 | .Ar address . | |
d2616b08 | 70 | .It Ic clientid Ar string |
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71 | Send the |
72 | .Ar clientid . | |
d2616b08 | 73 | If the string is of the format 01:02:03 then it is encoded as hex. |
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74 | For interfaces whose hardware address is longer than 8 bytes, or if the |
75 | .Ar clientid | |
76 | is an empty string then | |
77 | .Nm dhcpcd | |
78 | sends a default | |
79 | .Ar clientid | |
80 | of the hardware family and the hardware address. | |
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81 | .It Ic duid |
82 | Generate an | |
83 | .Rs | |
84 | .%T "RFC 4361" | |
85 | .Re | |
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86 | compliant clientid. |
87 | This requires persistent storage and not all DHCP servers work with it so it's | |
88 | not enabled by default. | |
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89 | The duid generated will be held in |
90 | .Pa @SYSCONFDIR@/dhcpcd.duid | |
91 | and should not be copied to other hosts. | |
ba9dfb7a | 92 | .It Ic hostname Ar name |
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93 | Sends specified |
94 | .Ar hostname | |
d2616b08 | 95 | to the DHCP server so it can be registered in DNS. If |
35ff0dbb | 96 | .Ar hostname |
d2616b08 | 97 | if a FQDN (ie, contains a .) then it will be encoded as such. |
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98 | .It Ic fqdn Op none | ptr | both |
99 | none disables FQDN encoding, ptr just asks the DHCP server to update the PTR | |
100 | record of the host in DNS whereas both also updates the A record. | |
1b3bc477 | 101 | The current hostname or the hostname specified using the |
a26af491 | 102 | .Ic hostname |
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103 | option must be a FQDN. |
104 | .Nm dhcpcd | |
105 | itself never does any DNS updates. | |
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106 | .Nm dhcpcd |
107 | encodes the FQDN hostname as specified in | |
108 | .Li RFC1035 . | |
3adc5520 | 109 | .It Ic interface Ar interface |
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110 | Subsequent options are only parsed for this |
111 | .Ar interface . | |
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112 | .It Ic leasetime Ar seconds |
113 | Request a leasetime of | |
114 | .Ar seconds . | |
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115 | .It Ic metric Ar metric |
116 | Metrics are used to prefer an interface over another one, lowest wins. | |
117 | .Nm dhcpcd | |
118 | will supply a default metic of 200 + | |
119 | .Xr if_nametoindex 3 . | |
120 | An extra 100 will be added for wireless interfaces. | |
ba9dfb7a | 121 | .It Ic noarp |
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122 | Don't send any ARP requests. |
123 | This also disables IPv4LL. | |
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124 | .It Ic nogateway |
125 | Don't install any default routes. | |
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126 | .It Ic nohook Ar script |
127 | Don't run this hook script. | |
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128 | Matches full name, or prefixed with 2 numbers optionally ending with |
129 | .Pa .sh . | |
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130 | .It Ic noipv4ll |
131 | Don't attempt to obtain an IPv4LL address if we failed to get one via DHCP. | |
132 | See | |
133 | .Rs | |
134 | .%T "RFC 3927" | |
135 | .Re | |
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136 | .It Ic nolink |
137 | Don't receive link messages about carrier status. | |
138 | You should only set this for buggy interface drivers. | |
cc45fbd7 | 139 | .It Ic option Ar option |
d2616b08 | 140 | Requests the |
cc45fbd7 | 141 | .Ar option |
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142 | from the server. |
143 | It can be a variable to be used in | |
ee4e620a | 144 | .Xr dhcpcd-run-hooks 8 |
cf42802e | 145 | or the numerical value. |
cc45fbd7 | 146 | You can specify more options seperated by commas, spaces or more option lines. |
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147 | .Ic quiet |
148 | Supress any dhcpcd output to the console, except for errors. | |
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149 | .Ic reboot Ar seconds |
150 | Allow | |
151 | .Ar reboot | |
152 | seconds before moving to the discover phase if we have an old lease to use. | |
153 | The default is 10 seconds. | |
154 | A setting if 0 seconds causes | |
155 | .Nm dhcpcd | |
156 | to skip the reboot phase and go straight into discover. | |
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157 | .It Ic release |
158 | .Nm dhcpcd | |
159 | will release the lease prior to stopping the interface. | |
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160 | .It Ic require Ar option |
161 | Requires the | |
162 | .Ar option | |
163 | to be present in all DHCP messages, otherwise the message is ignored. | |
164 | It can be a variable to be used in | |
165 | .Xr dhcpcd-run-hooks 8 | |
166 | or the numerical value. | |
167 | You can specify more options seperated by commas, spaces or more require lines. | |
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168 | To enforce that |
169 | .Nm dhcpcd | |
170 | only responds to DHCP servers and not BOOTP servers, you can | |
171 | .Ic require | |
172 | .Ar dhcp_message_type . | |
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173 | .It Ic script Ar script |
174 | Use | |
175 | .Ar script | |
176 | instead of the default | |
177 | .Pa @SCRIPT@ . | |
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178 | .It Ic ssid Ar ssid |
179 | Subsequent options are only parsed for this wireless | |
180 | .Ar ssid . | |
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181 | .It Ic static Ar value |
182 | Configures a static | |
183 | .Ar value . | |
184 | If you set | |
185 | .Ic ip_address | |
186 | then | |
187 | .Nm dhcpcd | |
188 | will not attempt to obtain a lease and just use the value for the address with | |
189 | an infinite lease time. | |
190 | .Pp | |
191 | Here is an example which configures a static address, routes and dns. | |
192 | .D1 interface eth0 | |
193 | .D1 static ip_address=192.168.0.10/24 | |
194 | .D1 static routers=192.168.0.1 | |
195 | .D1 static domain_name_servers=192.168.0.1 | |
d2616b08 | 196 | .It Ic timeout Ar seconds |
fedb3da0 | 197 | The default timeout for waiting for a DHCP response is 30 seconds which may |
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198 | be too long or too short and can be changed here. |
199 | .It Ic userclass Ar string | |
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200 | Tag the DHCP messages with the userclass. |
201 | You can specify more than one. | |
bac03ede | 202 | .It Ic vendor Ar code , Ns Ar value |
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203 | Add an enscapulated vendor option. |
204 | .Ar code | |
205 | should be between 1 and 254 inclusive. | |
206 | Examples. | |
207 | .Pp | |
208 | Set the vendor option 01 with an IP address. | |
209 | .D1 vendor 01,192.168.0.2 | |
210 | Set the vendor option 02 with a hex code. | |
211 | .D1 vendor 02,01:02:03:04:05 | |
212 | Set the vendor option 03 with an IP address as a string. | |
213 | .D1 vendor 03,\e"192.168.0.2\e" | |
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214 | .It Ic vendorclassid Ar string |
215 | Change the default vendorclassid sent from dhcpcd-version. | |
216 | If not set then none is sent. | |
eaa90296 | 217 | .El |
ba9dfb7a | 218 | .Sh SEE ALSO |
ee4e620a | 219 | .Xr dhcpcd-run-hooks 8 , |
ba97e494 | 220 | .Xr dhcpcd 8 , |
065125d4 | 221 | .Xr if_nametoindex 3 , |
ba97e494 | 222 | .Xr fnmatch 3 |
ba9dfb7a | 223 | .Sh AUTHORS |
eaa90296 | 224 | .An Roy Marples <roy@marples.name> |
ba9dfb7a | 225 | .Sh BUGS |
56d212f2 | 226 | Please report them to http://roy.marples.name/projects/dhcpcd |