/mandos/release : revision 147

3

"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [

4

<!ENTITY VERSION "1.0">

5

<!ENTITY COMMANDNAME "mandos">

6

<!ENTITY OVERVIEW SYSTEM "overview.xml">

6

<!ENTITY TIMESTAMP "2008-09-02">

7

]>

8

9

9

10

11

<title>&COMMANDNAME;</title>

11

<title>Mandos Manual</title>

12

13

<productname>&COMMANDNAME;</productname>

13

<productname>Mandos</productname>

14

<productnumber>&VERSION;</productnumber>

15

<date>&TIMESTAMP;</date>

15

16

16

17

17

18

<firstname>Björn</firstname>

33

34

<holder>Teddy Hogeborn</holder>

34

35

<holder>Björn Påhlsson</holder>

35

36

</copyright>

36

37

<para>

38

This manual page is free software: you can redistribute it

39

and/or modify it under the terms of the GNU General Public

40

License as published by the Free Software Foundation,

41

either version 3 of the License, or (at your option) any

42

later version.

43

</para>

44

45

<para>

46

This manual page is distributed in the hope that it will

47

be useful, but WITHOUT ANY WARRANTY; without even the

48

implied warranty of MERCHANTABILITY or FITNESS FOR A

49

PARTICULAR PURPOSE. See the GNU General Public License

50

for more details.

51

</para>

52

53

<para>

54

You should have received a copy of the GNU General Public

55

License along with this program; If not, see

56

<ulink url="http://www.gnu.org/licenses/"/>.

57

</para>

58

</legalnotice>

37

<xi:include href="legalnotice.xml"/>

59

38

</refentryinfo>

60

39

61

40

66

45

67

46

<refname><command>&COMMANDNAME;</command></refname>

68

47

69

Sends encrypted passwords to authenticated Mandos clients

48

Gives encrypted passwords to authenticated Mandos clients

70

49

</refpurpose>

71

50

</refnamediv>

72

51

73

52

74

53

75

54

<command>&COMMANDNAME;</command>

76

<arg>--interface<arg choice="plain">IF</arg></arg>

77

<arg>--address<arg choice="plain">ADDRESS</arg></arg>

78

79

<arg>--priority<arg choice="plain">PRIORITY</arg></arg>

80

<arg>--servicename<arg choice="plain">NAME</arg></arg>

81

<arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>

82

<arg>--debug</arg>

83

</cmdsynopsis>

84

85

<command>&COMMANDNAME;</command>

86

87

<arg>-a<arg choice="plain">ADDRESS</arg></arg>

88

89

<arg>--priority<arg choice="plain">PRIORITY</arg></arg>

90

<arg>--servicename<arg choice="plain">NAME</arg></arg>

91

<arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>

92

<arg>--debug</arg>

55

<group>

56

<arg choice="plain"><option>--interface

57

58

<arg choice="plain"><option>-i

59

60

</group>

61

<sbr/>

62

<group>

63

<arg choice="plain"><option>--address

64

<replaceable>ADDRESS</replaceable></option></arg>

65

<arg choice="plain"><option>-a

66

<replaceable>ADDRESS</replaceable></option></arg>

67

</group>

68

<sbr/>

69

<group>

70

<arg choice="plain"><option>--port

71

72

<arg choice="plain"><option>-p

73

74

</group>

75

<sbr/>

76

<arg><option>--priority

77

<replaceable>PRIORITY</replaceable></option></arg>

78

<sbr/>

79

<arg><option>--servicename

80

81

<sbr/>

82

<arg><option>--configdir

83

<replaceable>DIRECTORY</replaceable></option></arg>

84

<sbr/>

85

<arg><option>--debug</option></arg>

93

86

</cmdsynopsis>

94

87

95

88

<command>&COMMANDNAME;</command>

96

89

97

98

90

91

99

92

</group>

100

93

</cmdsynopsis>

101

94

102

95

<command>&COMMANDNAME;</command>

103

<arg choice="plain">--version</arg>

96

<arg choice="plain"><option>--version</option></arg>

104

97

</cmdsynopsis>

105

98

106

99

<command>&COMMANDNAME;</command>

107

<arg choice="plain">--check</arg>

100

<arg choice="plain"><option>--check</option></arg>

108

101

</cmdsynopsis>

109

102

</refsynopsisdiv>

110

103

122

115

Any authenticated client is then given the stored pre-encrypted

123

116

password for that specific client.

124

117

</para>

125

126

118

</refsect1>

127

119

128

120

129

121

<title>PURPOSE</title>

130

131

122

<para>

132

123

The purpose of this is to enable <emphasis>remote and unattended

133

124

rebooting</emphasis> of client host computer with an

134

125

<emphasis>encrypted root file system</emphasis>. See <xref

135

126

linkend="overview"/> for details.

136

127

</para>

137

138

128

</refsect1>

139

129

140

130

141

131

<title>OPTIONS</title>

142

143

132

144

133

145

134

135

146

136

147

137

<para>

148

138

Show a help message and exit

149

139

</para>

150

140

</listitem>

151

141

</varlistentry>

152

153

154

<term><literal>-i</literal>, <literal>--interface <replaceable>

155

IF</replaceable></literal></term>

156

157

<para>

158

Only announce the server and listen to requests on network

159

interface <replaceable>IF</replaceable>. Default is to

160

use all available interfaces. <emphasis>Note:</emphasis>

161

a failure to bind to the specified interface is not

162

considered critical, and the server does not exit.

163

</para>

164

</listitem>

165

</varlistentry>

166

167

168

<term><literal>-a</literal>, <literal>--address <replaceable>

169

ADDRESS</replaceable></literal></term>

170

171

<para>

172

If this option is used, the server will only listen to a

173

specific address. This must currently be an IPv6 address;

174

an IPv4 address can be specified using the

175

<quote><literal>::FFFF:192.0.2.3</literal></quote> syntax.

176

Also, if a link-local address is specified, an interface

177

should be set, since a link-local address is only valid on

178

a single interface. By default, the server will listen to

179

all available addresses.

180

</para>

181

</listitem>

182

</varlistentry>

183

184

185

186

PORT</replaceable></literal></term>

187

188

<para>

189

If this option is used, the server to bind to that

190

port. By default, the server will listen to an arbitrary

191

port given by the operating system.

192

</para>

193

</listitem>

194

</varlistentry>

195

196

197

<term><literal>--check</literal></term>

142

143

144

<term><option>--interface</option>

145

146

147

148

149

<xi:include href="mandos-options.xml" xpointer="interface"/>

150

</listitem>

151

</varlistentry>

152

153

154

<term><option>--address

155

<replaceable>ADDRESS</replaceable></option></term>

156

<term><option>-a

157

<replaceable>ADDRESS</replaceable></option></term>

158

159

<xi:include href="mandos-options.xml" xpointer="address"/>

160

</listitem>

161

</varlistentry>

162

163

164

<term><option>--port

165

166

<term><option>-p

167

168

169

<xi:include href="mandos-options.xml" xpointer="port"/>

170

</listitem>

171

</varlistentry>

172

173

174

<term><option>--check</option></term>

198

175

199

176

<para>

200

177

Run the server’s self-tests. This includes any unit

202

179

</para>

203

180

</listitem>

204

181

</varlistentry>

205

206

207

<term><literal>--debug</literal></term>

208

209

<para>

210

If the server is run in debug mode, it will run in the

211

foreground and print a lot of debugging information. The

212

default is <emphasis>not</emphasis> to run in debug mode.

213

</para>

214

</listitem>

215

</varlistentry>

216

217

218

<term><literal>--priority <replaceable>

219

PRIORITY</replaceable></literal></term>

220

221

<para>

222

GnuTLS priority string for the TLS handshake with the

223

clients. The default is

224

<quote><literal>SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP</literal></quote>.

225

See <citerefentry><refentrytitle>gnutls_priority_init

226

</refentrytitle><manvolnum>3</manvolnum></citerefentry>

227

for the syntax. <emphasis>Warning</emphasis>: changing

228

this may make the TLS handshake fail, making communication

229

with clients impossible.

230

</para>

231

</listitem>

232

</varlistentry>

233

234

235

<term><literal>--servicename <replaceable>NAME</replaceable>

236

</literal></term>

237

238

<para>

239

Zeroconf service name. The default is

240

<quote><literal>Mandos</literal></quote>. This only needs

241

to be changed this if it, for some reason, is necessary to

242

run more than one server on the same

243

<emphasis>host</emphasis>, which would not normally be

244

useful. If there are name collisions on the same

245

<emphasis>network</emphasis>, the newer server will

246

automatically rename itself to <quote><literal>Mandos

247

#2</literal></quote>, and so on; therefore, this option is

248

not needed in that case.

249

</para>

250

</listitem>

251

</varlistentry>

252

253

254

<term><literal>--configdir <replaceable>DIR</replaceable>

255

</literal></term>

182

183

184

<term><option>--debug</option></term>

185

186

<xi:include href="mandos-options.xml" xpointer="debug"/>

187

</listitem>

188

</varlistentry>

189

190

191

<term><option>--priority <replaceable>

192

PRIORITY</replaceable></option></term>

193

194

<xi:include href="mandos-options.xml" xpointer="priority"/>

195

</listitem>

196

</varlistentry>

197

198

199

<term><option>--servicename

200

201

202

<xi:include href="mandos-options.xml"

203

xpointer="servicename"/>

204

</listitem>

205

</varlistentry>

206

207

208

<term><option>--configdir

209

<replaceable>DIRECTORY</replaceable></option></term>

256

210

257

211

<para>

258

212

Directory to search for configuration files. Default is

266

220

</varlistentry>

267

221

268

222

269

<term><literal>--version</literal></term>

223

<term><option>--version</option></term>

270

224

271

225

<para>

272

226

Prints the program version and exit.

278

232

279

233

280

234

<title>OVERVIEW</title>

281

&OVERVIEW;

235

<xi:include href="overview.xml"/>

282

236

<para>

283

237

This program is the server part. It is a normal server program

284

238

and will run in a normal system environment, not in an initial

285

RAM disk environment.

239

<acronym>RAM</acronym> disk environment.

286

240

</para>

287

241

</refsect1>

288

242

317

271

318

272

</row>

319

273

<row>

320

274

321

275

322

276

</row>

323

277

<row>

353

307

longer eligible to receive the encrypted password. The timeout,

354

308

checker program, and interval between checks can be configured

355

309

both globally and per client; see <citerefentry>

356

<refentrytitle>mandos.conf</refentrytitle>

357

358

310

<refentrytitle>mandos-clients.conf</refentrytitle>

359

311

<manvolnum>5</manvolnum></citerefentry>.

360

312

</para>

363

315

364

316

<title>LOGGING</title>

365

317

<para>

366

The server will send log messaged with various severity levels

367

to <filename>/dev/log</filename>. With the

318

The server will send log message with various severity levels to

319

<filename>/dev/log</filename>. With the

368

320

<option>--debug</option> option, it will log even more messages,

369

321

and also show them on the console.

370

322

</para>

382

334

<title>ENVIRONMENT</title>

383

335

384

336

385

337

386

338

387

339

<para>

388

340

To start the configured checker (see <xref

391

343

<varname>PATH</varname> to search for matching commands if

392

344

an absolute path is not given. See <citerefentry>

393

345

394

</citerefentry>

346

</citerefentry>.

395

347

</para>

396

348

</listitem>

397

349

</varlistentry>

493

445

Normal invocation needs no options:

494

446

</para>

495

447

<para>

496

<userinput>mandos</userinput>

448

<userinput>&COMMANDNAME;</userinput>

497

449

</para>

498

450

</informalexample>

499

451

506

458

<para>

507

459

508

460

509

<userinput>mandos --debug --configdir ~/mandos --servicename Test</userinput>

461

<userinput>&COMMANDNAME; --debug --configdir ~/mandos --servicename Test</userinput>

510

462

511

463

</para>

512

464

</informalexample>

518

470

<para>

519

471

520

472

521

<userinput>mandos --interface eth7 --address fe80::aede:48ff:fe71:f6f2</userinput>

473

<userinput>&COMMANDNAME; --interface eth7 --address fe80::aede:48ff:fe71:f6f2</userinput>

522

474

523

475

</para>

524

476

</informalexample>

565

517

restarting servers if it is suspected that a client has, in

566

518

fact, been compromised by parties who may now be running a

567

519

fake Mandos client with the keys from the non-encrypted

568

initial RAM image of the client host. What should be done in

569

that case (if restarting the server program really is

570

necessary) is to stop the server program, edit the

520

initial <acronym>RAM</acronym> image of the client host. What

521

should be done in that case (if restarting the server program

522

really is necessary) is to stop the server program, edit the

571

523

configuration file to omit any suspect clients, and restart

572

524

the server program.

573

525

</para>

581

533

582

534

583

535

536

<para>

537

538

<refentrytitle>mandos-clients.conf</refentrytitle>

539

540

<refentrytitle>mandos.conf</refentrytitle>

541

542

<refentrytitle>password-request</refentrytitle>

543

<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>

544

545

</citerefentry>

546

</para>

584

547

585

548

586

549

<term>

587

588

<refentrytitle>password-request</refentrytitle>

589

<manvolnum>8mandos</manvolnum>

590

</citerefentry>

591

</term>

592

593

<para>

594

This is the actual program which talks to this server.

595

Note that it is normally not invoked directly, and is only

596

run in the initial RAM disk environment, and not on a

597

fully started system.

598

</para>

599

</listitem>

600

</varlistentry>

601

602

<term>

603

550

<ulink url="http://www.zeroconf.org/">Zeroconf</ulink>

604

551

</term>

605

552

622

569

</varlistentry>

623

570

624

571

<term>

625

<ulink

626

url="http://www.gnu.org/software/gnutls/">GnuTLS</ulink>

572

<ulink url="http://www.gnu.org/software/gnutls/"

573

>GnuTLS</ulink>

627

574

</term>

628

575

629

576

<para>

635

582

</varlistentry>

636

583

637

584

<term>

638

<citation>RFC 4291: <citetitle>IP Version 6 Addressing

639

Architecture</citetitle>, section 2.5.6, Link-Local IPv6

640

Unicast Addresses</citation>

585

RFC 4291: <citetitle>IP Version 6 Addressing

586

Architecture</citetitle>

641

587

</term>

642

588

643

<para>

644

The clients use IPv6 link-local addresses, which are

645

immediately usable since a link-local addresses is

646

automatically assigned to a network interfaces when it is

647

brought up.

648

</para>

589

590

591

<term>Section 2.2: <citetitle>Text Representation of

592

Addresses</citetitle></term>

593

594

</varlistentry>

595

596

<term>Section 2.5.5.2: <citetitle>IPv4-Mapped IPv6

597

Address</citetitle></term>

598

599

</varlistentry>

600

601

<term>Section 2.5.6, <citetitle>Link-Local IPv6 Unicast

602

Addresses</citetitle></term>

603

604

<para>

605

The clients use IPv6 link-local addresses, which are

606

immediately usable since a link-local addresses is

607

automatically assigned to a network interfaces when it

608

is brought up.

609

</para>

610

</listitem>

611

</varlistentry>

612

</variablelist>

649

613

</listitem>

650

614

</varlistentry>

651

615

652

616

<term>

653

<citation>RFC 4346: <citetitle>The Transport Layer Security

654

(TLS) Protocol Version 1.1</citetitle></citation>

617

RFC 4346: <citetitle>The Transport Layer Security (TLS)

618

Protocol Version 1.1</citetitle>

655

619

</term>

656

620

657

621

<para>

661

625

</varlistentry>

662

626

663

627

<term>

664

<citation>RFC 4880: <citetitle>OpenPGP Message

665

Format</citetitle></citation>

628

RFC 4880: <citetitle>OpenPGP Message Format</citetitle>

666

629

</term>

667

630

668

631

<para>

672

635

</varlistentry>

673

636

674

637

<term>

675

<citation>RFC 5081: <citetitle>Using OpenPGP Keys for

676

Transport Layer Security</citetitle></citation>

638

RFC 5081: <citetitle>Using OpenPGP Keys for Transport Layer

639

Security</citetitle>

677

640

</term>

678

641

679

642

<para>

685

648

</variablelist>

686

649

</refsect1>

687

650

</refentry>

651

652

653

654

655