Gecko [ www.utparral.edu.mx ]

Name	Size	Permission
examples	[ DIR ]	drwxr-xr-x
AUTHORS	28 B	-rw-r--r--
changelog.Debian.gz	2.19 KB	-rw-r--r--
Changes.rst.gz	18.4 KB	-rw-r--r--
copyright	12.99 KB	-rw-r--r--
COPYRIGHT.GPL.gz	6.64 KB	-rw-r--r--
gui-notes.txt.gz	3.73 KB	-rw-r--r--
management-notes.txt.gz	14.62 KB	-rw-r--r--
NEWS.Debian.gz	1.84 KB	-rw-r--r--
openvpn.8.html	347.3 KB	-rw-r--r--
openvpn-examples.5.html	18 KB	-rw-r--r--
PORTS	3.75 KB	-rw-r--r--
README	2.12 KB	-rw-r--r--
README.auth-pam	3.97 KB	-rw-r--r--
README.Debian.gz	3.76 KB	-rw-r--r--
README.down-root	880 B	-rw-r--r--
README.IPv6	1.79 KB	-rw-r--r--
README.mbedtls	788 B	-rw-r--r--
README.systemd	2.37 KB	-rw-r--r--

Code Editor : openvpn-examples.5.html

<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
<title>openvpn examples</title>
<style type="text/css">

/*
:Author: David Goodger (goodger@python.org)
:Id: $Id: html4css1.css 7952 2016-07-26 18:15:59Z milde $
:Copyright: This stylesheet has been placed in the public domain.

Default cascading style sheet for the HTML output of Docutils.

See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
customize this style sheet.
*/

/* used to remove borders from tables and images */
.borderless, table.borderless td, table.borderless th {
  border: 0 }

table.borderless td, table.borderless th {
  /* Override padding for "table.docutils td" with "! important".
     The right padding separates the table cells. */
  padding: 0 0.5em 0 0 ! important }

.first {
  /* Override more specific margin styles with "! important". */
  margin-top: 0 ! important }

.last, .with-subtitle {
  margin-bottom: 0 ! important }

.hidden {
  display: none }

.subscript {
  vertical-align: sub;
  font-size: smaller }

.superscript {
  vertical-align: super;
  font-size: smaller }

a.toc-backref {
  text-decoration: none ;
  color: black }

blockquote.epigraph {
  margin: 2em 5em ; }

dl.docutils dd {
  margin-bottom: 0.5em }

object[type="image/svg+xml"], object[type="application/x-shockwave-flash"] {
  overflow: hidden;
}

/* Uncomment (and remove this text!) to get bold-faced definition list terms
dl.docutils dt {
  font-weight: bold }
*/

div.abstract {
  margin: 2em 5em }

div.abstract p.topic-title {
  font-weight: bold ;
  text-align: center }

div.admonition, div.attention, div.caution, div.danger, div.error,
div.hint, div.important, div.note, div.tip, div.warning {
  margin: 2em ;
  border: medium outset ;
  padding: 1em }

div.admonition p.admonition-title, div.hint p.admonition-title,
div.important p.admonition-title, div.note p.admonition-title,
div.tip p.admonition-title {
  font-weight: bold ;
  font-family: sans-serif }

div.attention p.admonition-title, div.caution p.admonition-title,
div.danger p.admonition-title, div.error p.admonition-title,
div.warning p.admonition-title, .code .error {
  color: red ;
  font-weight: bold ;
  font-family: sans-serif }

/* Uncomment (and remove this text!) to get reduced vertical space in
   compound paragraphs.
div.compound .compound-first, div.compound .compound-middle {
  margin-bottom: 0.5em }

div.compound .compound-last, div.compound .compound-middle {
  margin-top: 0.5em }
*/

div.dedication {
  margin: 2em 5em ;
  text-align: center ;
  font-style: italic }

div.dedication p.topic-title {
  font-weight: bold ;
  font-style: normal }

div.figure {
  margin-left: 2em ;
  margin-right: 2em }

div.footer, div.header {
  clear: both;
  font-size: smaller }

div.line-block {
  display: block ;
  margin-top: 1em ;
  margin-bottom: 1em }

div.line-block div.line-block {
  margin-top: 0 ;
  margin-bottom: 0 ;
  margin-left: 1.5em }

div.sidebar {
  margin: 0 0 0.5em 1em ;
  border: medium outset ;
  padding: 1em ;
  background-color: #ffffee ;
  width: 40% ;
  float: right ;
  clear: right }

div.sidebar p.rubric {
  font-family: sans-serif ;
  font-size: medium }

div.system-messages {
  margin: 5em }

div.system-messages h1 {
  color: red }

div.system-message {
  border: medium outset ;
  padding: 1em }

div.system-message p.system-message-title {
  color: red ;
  font-weight: bold }

div.topic {
  margin: 2em }

h1.section-subtitle, h2.section-subtitle, h3.section-subtitle,
h4.section-subtitle, h5.section-subtitle, h6.section-subtitle {
  margin-top: 0.4em }

h1.title {
  text-align: center }

h2.subtitle {
  text-align: center }

hr.docutils {
  width: 75% }

img.align-left, .figure.align-left, object.align-left, table.align-left {
  clear: left ;
  float: left ;
  margin-right: 1em }

img.align-right, .figure.align-right, object.align-right, table.align-right {
  clear: right ;
  float: right ;
  margin-left: 1em }

img.align-center, .figure.align-center, object.align-center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

table.align-center {
  margin-left: auto;
  margin-right: auto;
}

.align-left {
  text-align: left }

.align-center {
  clear: both ;
  text-align: center }

.align-right {
  text-align: right }

/* reset inner alignment in figures */
div.align-right {
  text-align: inherit }

/* div.align-center * { */
/*   text-align: left } */

.align-top    {
  vertical-align: top }

.align-middle {
  vertical-align: middle }

.align-bottom {
  vertical-align: bottom }

ol.simple, ul.simple {
  margin-bottom: 1em }

ol.arabic {
  list-style: decimal }

ol.loweralpha {
  list-style: lower-alpha }

ol.upperalpha {
  list-style: upper-alpha }

ol.lowerroman {
  list-style: lower-roman }

ol.upperroman {
  list-style: upper-roman }

p.attribution {
  text-align: right ;
  margin-left: 50% }

p.caption {
  font-style: italic }

p.credits {
  font-style: italic ;
  font-size: smaller }

p.label {
  white-space: nowrap }

p.rubric {
  font-weight: bold ;
  font-size: larger ;
  color: maroon ;
  text-align: center }

p.sidebar-title {
  font-family: sans-serif ;
  font-weight: bold ;
  font-size: larger }

p.sidebar-subtitle {
  font-family: sans-serif ;
  font-weight: bold }

p.topic-title {
  font-weight: bold }

pre.address {
  margin-bottom: 0 ;
  margin-top: 0 ;
  font: inherit }

pre.literal-block, pre.doctest-block, pre.math, pre.code {
  margin-left: 2em ;
  margin-right: 2em }

pre.code .ln { color: grey; } /* line numbers */
pre.code, code { background-color: #eeeeee }
pre.code .comment, code .comment { color: #5C6576 }
pre.code .keyword, code .keyword { color: #3B0D06; font-weight: bold }
pre.code .literal.string, code .literal.string { color: #0C5404 }
pre.code .name.builtin, code .name.builtin { color: #352B84 }
pre.code .deleted, code .deleted { background-color: #DEB0A1}
pre.code .inserted, code .inserted { background-color: #A3D289}

span.classifier {
  font-family: sans-serif ;
  font-style: oblique }

span.classifier-delimiter {
  font-family: sans-serif ;
  font-weight: bold }

span.interpreted {
  font-family: sans-serif }

span.option {
  white-space: nowrap }

span.pre {
  white-space: pre }

span.problematic {
  color: red }

span.section-subtitle {
  /* font-size relative to parent (h1..h6 element) */
  font-size: 80% }

table.citation {
  border-left: solid 1px gray;
  margin-left: 1px }

table.docinfo {
  margin: 2em 4em }

table.docutils {
  margin-top: 0.5em ;
  margin-bottom: 0.5em }

table.footnote {
  border-left: solid 1px black;
  margin-left: 1px }

table.docutils td, table.docutils th,
table.docinfo td, table.docinfo th {
  padding-left: 0.5em ;
  padding-right: 0.5em ;
  vertical-align: top }

table.docutils th.field-name, table.docinfo th.docinfo-name {
  font-weight: bold ;
  text-align: left ;
  white-space: nowrap ;
  padding-left: 0 }

/* "booktabs" style (no vertical lines) */
table.docutils.booktabs {
  border: 0px;
  border-top: 2px solid;
  border-bottom: 2px solid;
  border-collapse: collapse;
}
table.docutils.booktabs * {
  border: 0px;
}
table.docutils.booktabs th {
  border-bottom: thin solid;
  text-align: left;
}

h1 tt.docutils, h2 tt.docutils, h3 tt.docutils,
h4 tt.docutils, h5 tt.docutils, h6 tt.docutils {
  font-size: 100% }

ul.auto-toc {
  list-style-type: none }

</style>
</head>
<body>
<div class="document" id="openvpn-examples">
<h1 class="title">openvpn examples</h1>
<h2 class="subtitle" id="secure-ip-tunnel-daemon">Secure IP tunnel daemon</h2>
<table class="docinfo" frame="void" rules="none">
<col class="docinfo-name" />
<col class="docinfo-content" />
<tbody valign="top">
<tr class="manual-section field"><th class="docinfo-name">Manual section:</th><td class="field-body">5</td>
</tr>
<tr class="manual-group field"><th class="docinfo-name">Manual group:</th><td class="field-body">Configuration files</td>
</tr>
</tbody>
</table>
<div class="section" id="introduction">
<h1>INTRODUCTION</h1>
<p>This man page gives a few simple examples to create OpenVPN setups and configuration files.</p>
</div>
<div class="section" id="examples">
<h1>EXAMPLES</h1>
<p>Prior to running these examples, you should have OpenVPN installed on
two machines with network connectivity between them. If you have not yet
installed OpenVPN, consult the INSTALL file included in the OpenVPN
distribution.</p>
<div class="section" id="firewall-setup">
<h2>Firewall Setup:</h2>
<p>If firewalls exist between the two machines, they should be set to
forward the port OpenVPN is configured to use, in both directions.
The default for OpenVPN is 1194/udp.  If you do not have control
over the firewalls between the two machines, you may still be able to
use OpenVPN by adding <tt class="docutils literal"><span class="pre">--ping</span> 15</tt> to each of the <tt class="docutils literal">openvpn</tt> commands
used below in the examples (this will cause each peer to send out a UDP
ping to its remote peer once every 15 seconds which will cause many
stateful firewalls to forward packets in both directions without an
explicit firewall rule).</p>
<p>Please see your operating system guides for how to configure the firewall
on your systems.</p>
</div>
<div class="section" id="vpn-address-setup">
<h2>VPN Address Setup:</h2>
<p>For purposes of our example, our two machines will be called
<tt class="docutils literal">bob.example.com</tt> and <tt class="docutils literal">alice.example.com</tt>. If you are constructing a
VPN over the internet, then replace <tt class="docutils literal">bob.example.com</tt> and
<tt class="docutils literal">alice.example.com</tt> with the internet hostname or IP address that each
machine will use to contact the other over the internet.</p>
<p>Now we will choose the tunnel endpoints. Tunnel endpoints are private IP
addresses that only have meaning in the context of the VPN. Each machine
will use the tunnel endpoint of the other machine to access it over the
VPN. In our example, the tunnel endpoint for bob.example.com will be
10.4.0.1 and for alice.example.com, 10.4.0.2.</p>
<p>Once the VPN is established, you have essentially created a secure
alternate path between the two hosts which is addressed by using the
tunnel endpoints. You can control which network traffic passes between
the hosts (a) over the VPN or (b) independently of the VPN, by choosing
whether to use (a) the VPN endpoint address or (b) the public internet
address, to access the remote host. For example if you are on
bob.example.com and you wish to connect to <tt class="docutils literal">alice.example.com</tt> via
<tt class="docutils literal">ssh</tt> without using the VPN (since <strong>ssh</strong> has its own built-in security)
you would use the command <tt class="docutils literal">ssh alice.example.com</tt>. However in the same
scenario, you could also use the command <tt class="docutils literal">telnet 10.4.0.2</tt> to create a
telnet session with alice.example.com over the VPN, that would use the
VPN to secure the session rather than <tt class="docutils literal">ssh</tt>.</p>
<p>You can use any address you wish for the tunnel endpoints but make sure
that they are private addresses (such as those that begin with 10 or
192.168) and that they are not part of any existing subnet on the
networks of either peer, unless you are bridging. If you use an address
that is part of your local subnet for either of the tunnel endpoints,
you will get a weird feedback loop.</p>
</div>
<div class="section" id="example-1-a-simple-tunnel-without-security">
<h2>Example 1: A simple tunnel without security</h2>
<p>On bob:</p>
<pre class="literal-block">
openvpn --remote alice.example.com --dev tun1 \
         --ifconfig 10.4.0.1 10.4.0.2 --verb 9
</pre>
<p>On alice:</p>
<pre class="literal-block">
openvpn --remote bob.example.com --dev tun1 \
         --ifconfig 10.4.0.2 10.4.0.1 --verb 9
</pre>
<p>Now verify the tunnel is working by pinging across the tunnel.</p>
<p>On bob:</p>
<pre class="literal-block">
ping 10.4.0.2
</pre>
<p>On alice:</p>
<pre class="literal-block">
ping 10.4.0.1
</pre>
<p>The <tt class="docutils literal"><span class="pre">--verb</span> 9</tt> option will produce verbose output, similar to the
<tt class="docutils literal">tcpdump</tt>(8) program. Omit the <tt class="docutils literal"><span class="pre">--verb</span> 9</tt> option to have OpenVPN run
quietly.</p>
</div>
<div class="section" id="example-2-a-tunnel-with-static-key-security-i-e-using-a-pre-shared-secret">
<h2>Example 2: A tunnel with static-key security (i.e. using a pre-shared secret)</h2>
<p>First build a static key on bob.</p>
<pre class="literal-block">
openvpn --genkey --secret key
</pre>
<p>This command will build a key file called <tt class="docutils literal">key</tt> (in ascii format). Now
copy <tt class="docutils literal">key</tt> to <tt class="docutils literal">alice.example.com</tt> over a secure medium such as by using
the <tt class="docutils literal">scp</tt>(1) program.</p>
<p>On bob:</p>
<pre class="literal-block">
openvpn --remote alice.example.com --dev tun1  \
         --ifconfig 10.4.0.1 10.4.0.2 --verb 5 \
         --secret key
</pre>
<p>On alice:</p>
<pre class="literal-block">
openvpn --remote bob.example.com --dev tun1   \
        --ifconfig 10.4.0.2 10.4.0.1 --verb 5 \
        --secret key
</pre>
<p>Now verify the tunnel is working by pinging across the tunnel.</p>
<p>On bob:</p>
<pre class="literal-block">
ping 10.4.0.2
</pre>
<p>On alice:</p>
<pre class="literal-block">
ping 10.4.0.1
</pre>
</div>
<div class="section" id="example-3-a-tunnel-with-full-tls-based-security">
<h2>Example 3: A tunnel with full TLS-based security</h2>
<p>For this test, we will designate <tt class="docutils literal">bob</tt> as the TLS client and <tt class="docutils literal">alice</tt>
as the TLS server.</p>
<dl class="docutils">
<dt><em>Note:</em></dt>
<dd>The client or server designation only has
meaning for the TLS subsystem. It has no bearing on OpenVPN's
peer-to-peer, UDP-based communication model.*</dd>
</dl>
<p>First, build a separate certificate/key pair for both bob and alice (see
above where <tt class="docutils literal"><span class="pre">--cert</span></tt> is discussed for more info). Then construct
Diffie Hellman parameters (see above where <tt class="docutils literal"><span class="pre">--dh</span></tt> is discussed for
more info). You can also use the included test files <code>client.crt</code>,
<code>client.key</code>, <code>server.crt</code>, <code>server.key</code> and
<code>ca.crt</code>. The <tt class="docutils literal">.crt</tt> files are certificates/public-keys, the
<tt class="docutils literal">.key</tt> files are private keys, and <code>ca.crt</code> is a certification
authority who has signed both <code>client.crt</code> and <code>server.crt</code>.
For Diffie Hellman parameters you can use the included file
<code>dh2048.pem</code>.</p>
<dl class="docutils">
<dt><em>WARNING:</em></dt>
<dd>All client, server, and certificate authority certificates
and keys included in the OpenVPN distribution are totally
insecure and should be used for testing only.</dd>
</dl>
<p>On bob:</p>
<pre class="literal-block">
openvpn --remote alice.example.com --dev tun1    \
        --ifconfig 10.4.0.1 10.4.0.2             \
        --tls-client --ca ca.crt                 \
        --cert client.crt --key client.key       \
        --reneg-sec 60 --verb 5
</pre>
<p>On alice:</p>
<pre class="literal-block">
openvpn --remote bob.example.com --dev tun1      \
        --ifconfig 10.4.0.2 10.4.0.1             \
        --tls-server --dh dh1024.pem --ca ca.crt \
        --cert server.crt --key server.key       \
        --reneg-sec 60 --verb 5
</pre>
<p>Now verify the tunnel is working by pinging across the tunnel.</p>
<p>On bob:</p>
<pre class="literal-block">
ping 10.4.0.2
</pre>
<p>On alice:</p>
<pre class="literal-block">
ping 10.4.0.1
</pre>
<p>Notice the <tt class="docutils literal"><span class="pre">--reneg-sec</span> 60</tt> option we used above. That tells OpenVPN
to renegotiate the data channel keys every minute. Since we used
<tt class="docutils literal"><span class="pre">--verb</span> 5</tt> above, you will see status information on each new key
negotiation.</p>
<p>For production operations, a key renegotiation interval of 60 seconds is
probably too frequent. Omit the <tt class="docutils literal"><span class="pre">--reneg-sec</span> 60</tt> option to use
OpenVPN's default key renegotiation interval of one hour.</p>
</div>
<div class="section" id="routing">
<h2>Routing:</h2>
<p>Assuming you can ping across the tunnel, the next step is to route a
real subnet over the secure tunnel. Suppose that bob and alice have two
network interfaces each, one connected to the internet, and the other to
a private network. Our goal is to securely connect both private
networks. We will assume that bob's private subnet is <em>10.0.0.0/24</em> and
alice's is <em>10.0.1.0/24</em>.</p>
<p>First, ensure that IP forwarding is enabled on both peers. On Linux,
enable routing:</p>
<pre class="literal-block">
echo 1 &gt; /proc/sys/net/ipv4/ip_forward
</pre>
<p>This setting is not persistent.  Please see your operating systems
documentation how to properly configure IP forwarding, which is also
persistent through system boots.</p>
<p>If your system is configured with a firewall.  Please see your operating
systems guide on how to configure the firewall.  You typically want to
allow traffic coming from and going to the tun/tap adapter OpenVPN is
configured to use.</p>
<p>On bob:</p>
<pre class="literal-block">
route add -net 10.0.1.0 netmask 255.255.255.0 gw 10.4.0.2
</pre>
<p>On alice:</p>
<pre class="literal-block">
route add -net 10.0.0.0 netmask 255.255.255.0 gw 10.4.0.1
</pre>
<p>Now any machine on the <em>10.0.0.0/24</em> subnet can access any machine on the
<em>10.0.1.0/24</em> subnet over the secure tunnel (or vice versa).</p>
<p>In a production environment, you could put the route command(s) in a
script and execute with the <tt class="docutils literal"><span class="pre">--up</span></tt> option.</p>
</div>
</div>
</div>
</body>
</html>

${this.title}

Code Editor : openvpn-examples.5.html