64
69
><replaceable>PORT</replaceable></option></arg>
68
73
<arg choice="plain"><option>--interface
69
<replaceable>NAME</replaceable></option></arg>
70
<arg choice="plain"><option>-i
71
<replaceable>NAME</replaceable></option></arg>
74
<replaceable>NAME</replaceable><arg rep='repeat'
75
>,<replaceable>NAME</replaceable></arg></option></arg>
76
<arg choice="plain"><option>-i <replaceable>NAME</replaceable
77
><arg rep='repeat'>,<replaceable>NAME</replaceable></arg
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148
communicates with <citerefentry><refentrytitle
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149
>mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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150
to get a password. In slightly more detail, this client program
140
brings up a network interface, uses the interface’s IPv6
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link-local address to get network connectivity, uses Zeroconf to
142
find servers on the local network, and communicates with servers
143
using TLS with an OpenPGP key to ensure authenticity and
151
brings up network interfaces, uses the interfaces’ IPv6
152
link-local addresses to get network connectivity, uses Zeroconf
153
to find servers on the local network, and communicates with
154
servers using TLS with an OpenPGP key to ensure authenticity and
144
155
confidentiality. This client program keeps running, trying all
145
156
servers on the network, until it receives a satisfactory reply
146
157
or a TERM signal. After all servers have been tried, all
148
159
will wait indefinitely for new servers to appear.
151
The network interface is selected like this: If an interface is
152
specified using the <option>--interface</option> option, that
153
interface is used. Otherwise, <command>&COMMANDNAME;</command>
154
will choose any interface that is up and running and is not a
155
loopback interface, is not a point-to-point interface, is
156
capable of broadcasting and does not have the NOARP flag (see
162
The network interfaces are selected like this: If any interfaces
163
are specified using the <option>--interface</option> option,
164
those interface are used. Otherwise,
165
<command>&COMMANDNAME;</command> will use all interfaces that
166
are not loopback interfaces, are not point-to-point interfaces,
167
are capable of broadcasting and do not have the NOARP flag (see
157
168
<citerefentry><refentrytitle>netdevice</refentrytitle>
158
169
<manvolnum>7</manvolnum></citerefentry>). (If the
159
170
<option>--connect</option> option is used, point-to-point
160
interfaces and non-broadcast interfaces are accepted.) If no
161
acceptable interfaces are found, re-run the check but without
162
the <quote>up and running</quote> requirement, and manually take
163
the selected interface up (and later take it down on program
171
interfaces and non-broadcast interfaces are accepted.) If any
172
used interfaces are not up and running, they are first taken up
173
(and later taken down again on program exit).
167
Before a network interface is selected, all <quote>network
176
Before network interfaces are selected, all <quote>network
168
177
hooks</quote> are run; see <xref linkend="network-hooks"/>.
218
227
assumed to separate the address from the port number.
221
This option is normally only useful for testing and
230
Normally, Zeroconf would be used to locate Mandos servers,
231
in which case this option would only be used when testing
228
238
<term><option>--interface=<replaceable
229
>NAME</replaceable></option></term>
239
>NAME</replaceable><arg rep='repeat'>,<replaceable
240
>NAME</replaceable></arg></option></term>
231
<replaceable>NAME</replaceable></option></term>
242
<replaceable>NAME</replaceable><arg rep='repeat'>,<replaceable
243
>NAME</replaceable></arg></option></term>
234
Network interface that will be brought up and scanned for
235
Mandos servers to connect to. The default is the empty
236
string, which will automatically choose an appropriate
246
Comma separated list of network interfaces that will be
247
brought up and scanned for Mandos servers to connect to.
248
The default is the empty string, which will automatically
249
use all appropriate interfaces.
240
If the <option>--connect</option> option is used, this
241
specifies the interface to use to connect to the address
252
If the <option>--connect</option> option is used, and
253
exactly one interface name is specified (except
254
<quote><literal>none</literal></quote>), this specifies
255
the interface to use to connect to the address given.
245
258
Note that since this program will normally run in the
246
259
initial RAM disk environment, the interface must be an
247
260
interface which exists at that stage. Thus, the interface
248
can not be a pseudo-interface such as <quote>br0</quote>
249
or <quote>tun0</quote>; such interfaces will not exist
250
until much later in the boot process, and can not be used
251
by this program, unless created by a <quote>network
252
hook</quote> — see <xref linkend="network-hooks"/>.
261
can normally not be a pseudo-interface such as
262
<quote>br0</quote> or <quote>tun0</quote>; such interfaces
263
will not exist until much later in the boot process, and
264
can not be used by this program, unless created by a
265
<quote>network hook</quote> — see <xref
266
linkend="network-hooks"/>.
255
269
<replaceable>NAME</replaceable> can be the string
256
<quote><literal>none</literal></quote>; this will not use
257
any specific interface, and will not bring up an interface
258
on startup. This is not recommended, and only meant for
270
<quote><literal>none</literal></quote>; this will make
271
<command>&COMMANDNAME;</command> only bring up interfaces
272
specified <emphasis>before</emphasis> this string. This
273
is not recommended, and only meant for advanced users.
306
320
Sets the number of bits to use for the prime number in the
307
TLS Diffie-Hellman key exchange. Default is 1024.
321
TLS Diffie-Hellman key exchange. The default value is
322
selected automatically based on the OpenPGP key. Note
323
that if the <option>--dh-params</option> option is used,
324
the values from that file will be used instead.
330
<term><option>--dh-params=<replaceable
331
>FILE</replaceable></option></term>
334
Specifies a PEM-encoded PKCS#3 file to read the parameters
335
needed by the TLS Diffie-Hellman key exchange from. If
336
this option is not given, or if the file for some reason
337
could not be used, the parameters will be generated on
338
startup, which will take some time and processing power.
339
Those using servers running under time, power or processor
340
constraints may want to generate such a file in advance
438
472
<refsect1 id="environment">
439
473
<title>ENVIRONMENT</title>
476
<term><envar>MANDOSPLUGINHELPERDIR</envar></term>
479
This environment variable will be assumed to contain the
480
directory containing any helper executables. The use and
481
nature of these helper executables, if any, is
482
purposefully not documented.
441
This program does not use any environment variables, not even
442
the ones provided by <citerefentry><refentrytitle
488
This program does not use any other environment variables, not
489
even the ones provided by <citerefentry><refentrytitle
443
490
>cryptsetup</refentrytitle><manvolnum>8</manvolnum>
547
594
<term><envar>DEVICE</envar></term>
550
The network interface, as specified to
597
The network interfaces, as specified to
551
598
<command>&COMMANDNAME;</command> by the
552
<option>--interface</option> option. If this is not the
553
interface a hook will bring up, there is no reason for a
599
<option>--interface</option> option, combined to one
600
string and separated by commas. If this is set, and
601
does not contain the interface a hook will bring up,
602
there is no reason for a hook to continue.
741
789
It will also help if the checker program on the server is
742
790
configured to request something from the client which can not be
743
spoofed by someone else on the network, unlike unencrypted
744
<acronym>ICMP</acronym> echo (<quote>ping</quote>) replies.
791
spoofed by someone else on the network, like SSH server key
792
fingerprints, and unlike unencrypted <acronym>ICMP</acronym>
793
echo (<quote>ping</quote>) replies.
747
796
<emphasis>Note</emphasis>: This makes it completely insecure to
added
removed
plugins.d/mandos-client.xml
