64
72
><replaceable>PORT</replaceable></option></arg>
68
76
<arg choice="plain"><option>--interface
69
<replaceable>NAME</replaceable></option></arg>
70
<arg choice="plain"><option>-i
71
<replaceable>NAME</replaceable></option></arg>
77
<replaceable>NAME</replaceable><arg rep='repeat'
78
>,<replaceable>NAME</replaceable></arg></option></arg>
79
<arg choice="plain"><option>-i <replaceable>NAME</replaceable
80
><arg rep='repeat'>,<replaceable>NAME</replaceable></arg
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151
communicates with <citerefentry><refentrytitle
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152
>mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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153
to get a password. In slightly more detail, this client program
140
brings up a network interface, uses the interface’s IPv6
141
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
154
brings up network interfaces, uses the interfaces’ IPv6
155
link-local addresses to get network connectivity, uses Zeroconf
156
to find servers on the local network, and communicates with
157
servers using TLS with an OpenPGP key to ensure authenticity and
144
158
confidentiality. This client program keeps running, trying all
145
159
servers on the network, until it receives a satisfactory reply
146
160
or a TERM signal. After all servers have been tried, all
148
162
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
165
The network interfaces are selected like this: If any interfaces
166
are specified using the <option>--interface</option> option,
167
those interface are used. Otherwise,
168
<command>&COMMANDNAME;</command> will use all interfaces that
169
are not loopback interfaces, are not point-to-point interfaces,
170
are capable of broadcasting and do not have the NOARP flag (see
157
171
<citerefentry><refentrytitle>netdevice</refentrytitle>
158
172
<manvolnum>7</manvolnum></citerefentry>). (If the
159
173
<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
174
interfaces and non-broadcast interfaces are accepted.) If any
175
used interfaces are not up and running, they are first taken up
176
(and later taken down again on program exit).
167
Before a network interface is selected, all <quote>network
179
Before network interfaces are selected, all <quote>network
168
180
hooks</quote> are run; see <xref linkend="network-hooks"/>.
218
230
assumed to separate the address from the port number.
221
This option is normally only useful for testing and
233
Normally, Zeroconf would be used to locate Mandos servers,
234
in which case this option would only be used when testing
228
241
<term><option>--interface=<replaceable
229
>NAME</replaceable></option></term>
242
>NAME</replaceable><arg rep='repeat'>,<replaceable
243
>NAME</replaceable></arg></option></term>
231
<replaceable>NAME</replaceable></option></term>
245
<replaceable>NAME</replaceable><arg rep='repeat'>,<replaceable
246
>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
249
Comma separated list of network interfaces that will be
250
brought up and scanned for Mandos servers to connect to.
251
The default is the empty string, which will automatically
252
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
255
If the <option>--connect</option> option is used, and
256
exactly one interface name is specified (except
257
<quote><literal>none</literal></quote>), this specifies
258
the interface to use to connect to the address given.
245
261
Note that since this program will normally run in the
246
262
initial RAM disk environment, the interface must be an
247
263
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"/>.
264
can normally not be a pseudo-interface such as
265
<quote>br0</quote> or <quote>tun0</quote>; such interfaces
266
will not exist until much later in the boot process, and
267
can not be used by this program, unless created by a
268
<quote>network hook</quote> — see <xref
269
linkend="network-hooks"/>.
255
272
<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
273
<quote><literal>none</literal></quote>; this will make
274
<command>&COMMANDNAME;</command> only bring up interfaces
275
specified <emphasis>before</emphasis> this string. This
276
is not recommended, and only meant for advanced users.
306
323
Sets the number of bits to use for the prime number in the
307
TLS Diffie-Hellman key exchange. Default is 1024.
324
TLS Diffie-Hellman key exchange. The default value is
325
selected automatically based on the OpenPGP key. Note
326
that if the <option>--dh-params</option> option is used,
327
the values from that file will be used instead.
333
<term><option>--dh-params=<replaceable
334
>FILE</replaceable></option></term>
337
Specifies a PEM-encoded PKCS#3 file to read the parameters
338
needed by the TLS Diffie-Hellman key exchange from. If
339
this option is not given, or if the file for some reason
340
could not be used, the parameters will be generated on
341
startup, which will take some time and processing power.
342
Those using servers running under time, power or processor
343
constraints may want to generate such a file in advance
438
475
<refsect1 id="environment">
439
476
<title>ENVIRONMENT</title>
479
<term><envar>MANDOSPLUGINHELPERDIR</envar></term>
482
This environment variable will be assumed to contain the
483
directory containing any helper executables. The use and
484
nature of these helper executables, if any, is
485
purposefully not documented.
441
This program does not use any environment variables, not even
442
the ones provided by <citerefentry><refentrytitle
491
This program does not use any other environment variables, not
492
even the ones provided by <citerefentry><refentrytitle
443
493
>cryptsetup</refentrytitle><manvolnum>8</manvolnum>
547
597
<term><envar>DEVICE</envar></term>
550
The network interface, as specified to
600
The network interfaces, as specified to
551
601
<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
602
<option>--interface</option> option, combined to one
603
string and separated by commas. If this is set, and
604
does not contain the interface a hook will bring up,
605
there is no reason for a hook to continue.
741
791
It will also help if the checker program on the server is
742
792
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.
793
spoofed by someone else on the network, like SSH server key
794
fingerprints, and unlike unencrypted <acronym>ICMP</acronym>
795
echo (<quote>ping</quote>) replies.
747
798
<emphasis>Note</emphasis>: This makes it completely insecure to
added
removed
plugins.d/mandos-client.xml
