1
1
<?xml version="1.0" encoding="UTF-8"?>
2
2
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3
3
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4
<!ENTITY TIMESTAMP "2012-01-01">
4
<!ENTITY TIMESTAMP "2017-02-23">
5
5
<!ENTITY % common SYSTEM "common.ent">
73
78
<refsect1 id="introduction">
74
79
<title>INTRODUCTION</title>
81
<!-- This paragraph is a combination and paraphrase of two
82
quotes from the 1995 movie “The Usual Suspects”. -->
76
83
You know how it is. You’ve heard of it happening. The Man
77
84
comes and takes away your servers, your friends’ servers, the
78
85
servers of everybody in the same hosting facility. The servers
207
<refsect2 id="sniff">
208
<title>How about sniffing the network traffic and decrypting it
209
later by physically grabbing the Mandos client and using its
212
We only use <acronym>PFS</acronym> (Perfect Forward Security)
213
key exchange algorithms in TLS, which protects against this.
200
217
<refsect2 id="physgrab">
201
218
<title>Physically grabbing the Mandos server computer?</title>
218
<refsect2 id="fakeping">
219
<title>Faking ping replies?</title>
235
<refsect2 id="fakecheck">
236
<title>Faking checker results?</title>
221
The default for the server is to use
238
If the Mandos client does not have an SSH server, the default
239
is for the Mandos server to use
222
240
<quote><literal>fping</literal></quote>, the replies to which
223
241
could be faked to eliminate the timeout. But this could
224
242
easily be changed to any shell command, with any security
225
measures you like. It could, for instance, be changed to an
226
SSH command with strict keychecking, which could not be faked.
227
Or IPsec could be used for the ping packets, making them
243
measures you like. If the Mandos client
244
<emphasis>has</emphasis> an SSH server, the default
245
configuration (as generated by
246
<command>mandos-keygen</command> with the
247
<option>--password</option> option) is for the Mandos server
248
to use an <command>ssh-keyscan</command> command with strict
249
keychecking, which can not be faked. Alternatively, IPsec
250
could be used for the ping packets, making them secure.
added
removed
intro.xml
