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<command>&COMMANDNAME;</command> is a client program that
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communicates with <citerefentry><refentrytitle
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123
>mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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to get a password. In slightly more detail, this client program
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brings up network interfaces, uses the interfaces’ IPv6
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link-local addresses to get network connectivity, uses Zeroconf
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to find servers on the local network, and communicates with
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servers using TLS with an OpenPGP key to ensure authenticity and
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confidentiality. This client program keeps running, trying all
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servers on the network, until it receives a satisfactory reply
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or a TERM signal. After all servers have been tried, all
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servers are periodically retried. If no servers are found it
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will wait indefinitely for new servers to appear.
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The network interfaces are selected like this: If any interfaces
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are specified using the <option>--interface</option> option,
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those interface are used. Otherwise,
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<command>&COMMANDNAME;</command> will use all interfaces that
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are not loopback interfaces, are not point-to-point interfaces,
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are capable of broadcasting and do not have the NOARP flag (see
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<citerefentry><refentrytitle>netdevice</refentrytitle>
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<manvolnum>7</manvolnum></citerefentry>). (If the
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<option>--connect</option> option is used, point-to-point
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interfaces and non-broadcast interfaces are accepted.) If any
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used interfaces are not up and running, they are first taken up
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(and later taken down again on program exit).
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Before network interfaces are selected, all <quote>network
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hooks</quote> are run; see <xref linkend="network-hooks"/>.
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to get a password. It uses IPv6 link-local addresses to get
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network connectivity, Zeroconf to find servers, and TLS with an
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OpenPGP key to ensure authenticity and confidentiality. It
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keeps running, trying all servers on the network, until it
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receives a satisfactory reply or a TERM signal is received.
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This program is not meant to be run directly; it is really meant
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assumed to separate the address from the port number.
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Normally, Zeroconf would be used to locate Mandos servers,
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in which case this option would only be used when testing
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This option is normally only useful for testing and
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<term><option>--interface=<replaceable
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>NAME</replaceable><arg rep='repeat'>,<replaceable
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>NAME</replaceable></arg></option></term>
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<term><option>--interface=
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<replaceable>NAME</replaceable></option></term>
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<replaceable>NAME</replaceable><arg rep='repeat'>,<replaceable
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>NAME</replaceable></arg></option></term>
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<replaceable>NAME</replaceable></option></term>
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Comma separated list of network interfaces that will be
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brought up and scanned for Mandos servers to connect to.
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The default is the empty string, which will automatically
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use all appropriate interfaces.
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If the <option>--connect</option> option is used, and
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exactly one interface name is specified (except
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<quote><literal>none</literal></quote>), this specifies
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the interface to use to connect to the address given.
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Note that since this program will normally run in the
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initial RAM disk environment, the interface must be an
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interface which exists at that stage. Thus, the interface
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can normally not be a pseudo-interface such as
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<quote>br0</quote> or <quote>tun0</quote>; such interfaces
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will not exist until much later in the boot process, and
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can not be used by this program, unless created by a
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<quote>network hook</quote> — see <xref
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linkend="network-hooks"/>.
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<replaceable>NAME</replaceable> can be the string
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<quote><literal>none</literal></quote>; this will make
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<command>&COMMANDNAME;</command> not bring up
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<emphasis>any</emphasis> interfaces specified
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<emphasis>after</emphasis> this string. This is not
267
recommended, and only meant for advanced users.
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Network interface that will be brought up and scanned for
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Mandos servers to connect to. The default it
196
<quote><literal>eth0</literal></quote>.
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If the <option>--connect</option> option is used, this
200
specifies the interface to use to connect to the address
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<term><option>--delay=<replaceable
322
>SECONDS</replaceable></option></term>
325
After bringing a network interface up, the program waits
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for the interface to arrive in a <quote>running</quote>
327
state before proceeding. During this time, the kernel log
328
level will be lowered to reduce clutter on the system
329
console, alleviating any other plugins which might be
330
using the system console. This option sets the upper
331
limit of seconds to wait. The default is 2.5 seconds.
337
<term><option>--retry=<replaceable
338
>SECONDS</replaceable></option></term>
341
All Mandos servers are tried repeatedly until a password
342
is received. This value specifies, in seconds, how long
343
between each successive try <emphasis>for the same
344
server</emphasis>. The default is 10 seconds.
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<term><option>--network-hook-dir=<replaceable
351
>DIR</replaceable></option></term>
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Network hook directory. The default directory is
355
<quote><filename class="directory"
356
>/lib/mandos/network-hooks.d</filename></quote>.
362
255
<term><option>--debug</option></term>
456
<refsect1 id="network-hooks">
457
<title>NETWORK HOOKS</title>
459
If a network interface like a bridge or tunnel is required to
460
find a Mandos server, this requires the interface to be up and
461
running before <command>&COMMANDNAME;</command> starts looking
462
for Mandos servers. This can be accomplished by creating a
463
<quote>network hook</quote> program, and placing it in a special
467
Before the network is used (and again before program exit), any
468
runnable programs found in the network hook directory are run
469
with the argument <quote><literal>start</literal></quote> or
470
<quote><literal>stop</literal></quote>. This should bring up or
471
down, respectively, any network interface which
472
<command>&COMMANDNAME;</command> should use.
474
<refsect2 id="hook-requirements">
475
<title>REQUIREMENTS</title>
477
A network hook must be an executable file, and its name must
478
consist entirely of upper and lower case letters, digits,
479
underscores, periods, and hyphens.
482
A network hook will receive one argument, which can be one of
487
<term><literal>start</literal></term>
490
This should make the network hook create (if necessary)
491
and bring up a network interface.
496
<term><literal>stop</literal></term>
499
This should make the network hook take down a network
500
interface, and delete it if it did not exist previously.
505
<term><literal>files</literal></term>
508
This should make the network hook print, <emphasis>one
509
file per line</emphasis>, all the files needed for it to
510
run. (These files will be copied into the initial RAM
511
filesystem.) Typical use is for a network hook which is
512
a shell script to print its needed binaries.
515
It is not necessary to print any non-executable files
516
already in the network hook directory, these will be
517
copied implicitly if they otherwise satisfy the name
523
<term><literal>modules</literal></term>
526
This should make the network hook print, <emphasis>on
527
separate lines</emphasis>, all the kernel modules needed
528
for it to run. (These modules will be copied into the
529
initial RAM filesystem.) For instance, a tunnel
531
<quote><literal>tun</literal></quote> module.
537
The network hook will be provided with a number of environment
542
<term><envar>MANDOSNETHOOKDIR</envar></term>
545
The network hook directory, specified to
546
<command>&COMMANDNAME;</command> by the
547
<option>--network-hook-dir</option> option. Note: this
548
should <emphasis>always</emphasis> be used by the
549
network hook to refer to itself or any files in the hook
550
directory it may require.
555
<term><envar>DEVICE</envar></term>
558
The network interfaces, as specified to
559
<command>&COMMANDNAME;</command> by the
560
<option>--interface</option> option, combined to one
561
string and separated by commas. If this is set, and
562
does not contain the interface a hook will bring up,
563
there is no reason for a hook to continue.
568
<term><envar>MODE</envar></term>
571
This will be the same as the first argument;
572
i.e. <quote><literal>start</literal></quote>,
573
<quote><literal>stop</literal></quote>,
574
<quote><literal>files</literal></quote>, or
575
<quote><literal>modules</literal></quote>.
580
<term><envar>VERBOSITY</envar></term>
583
This will be the <quote><literal>1</literal></quote> if
584
the <option>--debug</option> option is passed to
585
<command>&COMMANDNAME;</command>, otherwise
586
<quote><literal>0</literal></quote>.
591
<term><envar>DELAY</envar></term>
594
This will be the same as the <option>--delay</option>
595
option passed to <command>&COMMANDNAME;</command>. Is
596
only set if <envar>MODE</envar> is
597
<quote><literal>start</literal></quote> or
598
<quote><literal>stop</literal></quote>.
603
<term><envar>CONNECT</envar></term>
606
This will be the same as the <option>--connect</option>
607
option passed to <command>&COMMANDNAME;</command>. Is
608
only set if <option>--connect</option> is passed and
609
<envar>MODE</envar> is
610
<quote><literal>start</literal></quote> or
611
<quote><literal>stop</literal></quote>.
617
A hook may not read from standard input, and should be
618
restrictive in printing to standard output or standard error
619
unless <varname>VERBOSITY</varname> is
620
<quote><literal>1</literal></quote>.
625
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<refsect1 id="files">
626
348
<title>FILES</title>