72
64
><replaceable>PORT</replaceable></option></arg>
76
68
<arg choice="plain"><option>--interface
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
69
<replaceable>NAME</replaceable></option></arg>
70
<arg choice="plain"><option>-i
71
<replaceable>NAME</replaceable></option></arg>
151
137
communicates with <citerefentry><refentrytitle
152
138
>mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
153
139
to get a password. In slightly more detail, this client program
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
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
158
144
confidentiality. This client program keeps running, trying all
159
145
servers on the network, until it receives a satisfactory reply
160
146
or a TERM signal. After all servers have been tried, all
162
148
will wait indefinitely for new servers to appear.
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
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
171
157
<citerefentry><refentrytitle>netdevice</refentrytitle>
172
158
<manvolnum>7</manvolnum></citerefentry>). (If the
173
159
<option>--connect</option> option is used, point-to-point
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).
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
179
Before network interfaces are selected, all <quote>network
167
Before a network interface is selected, all <quote>network
180
168
hooks</quote> are run; see <xref linkend="network-hooks"/>.
230
218
assumed to separate the address from the port number.
233
Normally, Zeroconf would be used to locate Mandos servers,
234
in which case this option would only be used when testing
221
This option is normally only useful for testing and
241
228
<term><option>--interface=<replaceable
242
>NAME</replaceable><arg rep='repeat'>,<replaceable
243
>NAME</replaceable></arg></option></term>
229
>NAME</replaceable></option></term>
245
<replaceable>NAME</replaceable><arg rep='repeat'>,<replaceable
246
>NAME</replaceable></arg></option></term>
231
<replaceable>NAME</replaceable></option></term>
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.
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
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.
240
If the <option>--connect</option> option is used, this
241
specifies the interface to use to connect to the address
261
245
Note that since this program will normally run in the
262
246
initial RAM disk environment, the interface must be an
263
247
interface which exists at that stage. Thus, the interface
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"/>.
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"/>.
272
255
<replaceable>NAME</replaceable> can be the string
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.
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
323
306
Sets the number of bits to use for the prime number in the
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
307
TLS Diffie-Hellman key exchange. Default is 1024.
475
438
<refsect1 id="environment">
476
439
<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.
491
This program does not use any other environment variables, not
492
even the ones provided by <citerefentry><refentrytitle
441
This program does not use any environment variables, not even
442
the ones provided by <citerefentry><refentrytitle
493
443
>cryptsetup</refentrytitle><manvolnum>8</manvolnum>
597
547
<term><envar>DEVICE</envar></term>
600
The network interfaces, as specified to
550
The network interface, as specified to
601
551
<command>&COMMANDNAME;</command> by the
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.
552
<option>--interface</option> option. If this is not the
553
interface a hook will bring up, there is no reason for a
791
741
It will also help if the checker program on the server is
792
742
configured to request something from the client which can not be
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.
743
spoofed by someone else on the network, unlike unencrypted
744
<acronym>ICMP</acronym> echo (<quote>ping</quote>) replies.
798
747
<emphasis>Note</emphasis>: This makes it completely insecure to