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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Margay — Managing Network Security Appliances with Ruby and Sinatra</title>
<!-- metadata -->
<meta name="generator" content="S5" />
<meta name="version" content="S5 1.1" />
<meta name="presdate" content="" />
<meta name="author" content="Guido De Rosa" />
<meta name="company" content="VEMAR s.a.s." />
<!-- configuration parameters -->
<meta name="defaultView" content="slideshow" />
<meta name="controlVis" content="hidden" />
<!-- style sheet links -->
<link rel="stylesheet" href="ui/default/slides.css" type="text/css" media="projection" id="slideProj" />
<link rel="stylesheet" href="ui/default/outline.css" type="text/css" media="screen" id="outlineStyle" />
<link rel="stylesheet" href="ui/default/print.css" type="text/css" media="print" id="slidePrint" />
<link rel="stylesheet" href="ui/default/opera.css" type="text/css" media="projection" id="operaFix" />
<!-- S5 JS -->
<script src="ui/default/slides.js" type="text/javascript"></script>
<!-- Custom style -->
<style type="text/css">
#slide0 h2 em {
font-style: normal;
}
em {
/* color: #226; */
}
h1 em, .slide h1 code {
color: inherit;
}
.part {
text-align:center;
margin-top:4em;
font-size:140%;
}
pre {
text-align: left;
}
a img {
border: 0;
}
div.slide h1 {
text-transform: none;
}
div.slide#slide0 h1 {
font-size:170%;
}
.slide ul li ul li {
font-size:100%;
margin-top: 0.75em;
}
div#footer {
height: 1.1em;
}
</style>
</head>
<body>
<div class="layout">
<div id="controls"><!-- DO NOT EDIT --></div>
<div id="currentSlide"><!-- DO NOT EDIT --></div>
<div id="header"></div>
<div id="footer">
<!-- allow reuse for multiple events -->
</div>
</div>
<div class="presentation">
<div class="slide" id="slide0">
<h1>A Linux-based Network Security, Access Control and Virtualization Appliance</h1>
<h2>
Introducing <a href="http://www.margay.it/">MARGAY</a>, a ReSTful firewall, VPN router, AAA server, Web Content Filter and Private Cloud Management System
</h2>
<img src="img/margay-alpha-240.png" style="float:right;"/>
<h3>Guido De Rosa</h3>
<h4>
<a href="http://dev.vemarsas.it/">VEMAR s.a.s.</a>
</h4>
<a href="http://dev.vemarsas.it/"><img src="img/vemar-logo.jpg" style="height:2em;"/></a>
</div>
<div class="slide">
<h1><em>Margay</em> is a complete system</h1>
<img src="img/3acrosser.png" style="float:right; height:13em;"/>
<ul>
<li>But you can get the web interface alone (a Sinatra application)</li>
<li><a href="http://github.com/vemarsas/onboard">http://github.com/vemarsas/onboard</a></li>
<li>And get it deployed on your own hardware...</li>
<li>...with some sysadmin work ;)</li>
<li>We support <em>Acrosser</em>, <em>Jetway</em>, <em>HP</em>, ...</li>
</ul>
</div>
<div class="slide">
<h1>Not-So-Embedded</h1>
<img src="img/3acrosser.png" style="float:right; height:13em;"/>
<ul style="font-size: 94%">
<li>A standard x86(_64) machine with GHz CPU and GiB+ RAM</li>
<li>Can run DansGuardian + ClamAV (and afford content scanning)</li>
<li>Can host a MySQL <em>server</em>, necessary for RADIUS AAA (something OpenWRT can not)</li>
<li>Can run multiple QEMU/KVM virtual machines (in production: ERP, VoIP, Linux and Windows servers, etc.) (also with real hardware <em>passed-through</em>)</li>
<li>A Cluster of MARGAYs: distributed storage, private clouds, ... </li>
</ul>
</div>
<div class="slide">
<h1>Not-So-Embedded</h1>
<img src="img/debian/spacefun.png" style="float:right;"/>
<ul>
<li>Debian-based</li>
<li>...but 99% independent upon distro-specific features</li>
<li>Porting to non-Linux Unices would be non-trivial instead (iproute2, iptables, ...)</li>
<li><code>~/.onboard/etc/config</code>(instead of <code>/etc</code>)</li>
<li>Starts / stops / restores services on its own...</li>
<li>...but un-managed services still handled by distro init scripts</li>
</ul>
</div>
<div class="slide">
<h1><em>Lots</em> of features...</h1>
<ul>
<li>...but this ain't a trade fair</div>
</ul>
</div>
<div class="slide">
<h1>Industry Events & Press</h1>
<div style="text-align:right;">
<img src="img/setd3gpls.jpg" style="height:7em"/>
<img src="img/ospark.jpg" style="width:7em"/>
<img src="img/cebit_logo.jpg" style="height: 4em"/>
<img src="img/cebit-stand-h.jpeg" style="height:7em"/>
</div>
<div>
<small><a href="http://www.h-online.com/open/features/Open-Source-at-CeBIT-2011-1206993.html?page=3">http://www.h-online.com/open/features/Open-Source-at-CeBIT-2011-1206993.html?page=3</a></small>
</div>
<div><img src="img/theH_logo.gif"/></div>
</div>
<div class="slide">
<div class="part">
<pre>class OnBoard
class Controller < Sinatra::Base </pre>
<img src="img/sinatra_logo.gif"/>
</div>
</div>
<div class="slide">
<h1>Why Sinatra (and Ruby)?</h1>
<ul>
<img src="img/ruby_logo.png" style="float:right; height:4em;"></img>
<li>Lightweight (duh!)</li>
<li>RESTful in a natural way</li>
<li>Why RESTful?</li>
<li>Poor-man SNMP… ?</li>
<li>Each (human-readable) HTML page also provides JSON (and Ruby objects, in development)</li>
<li>Error messages are HTTP statuses (even in the UI)</li>
<li>Sound URLs: <code>/network/interfaces/eth0.html</code></li>
</ul>
</div>
<div class="slide">
<h1>RESTful Top-bar</h1>
<img src="img/screen/restful-vpn.png" style="width:100%;"/>
</div>
<div class="slide">
<h1 style="text-transform: none;">/network/openvpn.json</h1>
<pre> },
"subject": {
"C": "IT",
"ST": "NA",
"L": "Napoli",
"O": "Vemar sas",
"CN": "napoli.vpn.vemarsas.it",
"emailAddress": "guido.derosa@vemarsas.it"
},
"not_before": "2011-04-11 16:39:44 UTC",
"not_after": "2021-04-08 16:39:44 UTC"
},
"dev-type": "tun",
"dev": "ovpn_tun1",
"client": {
"Virtual Address": "10.179.239.10",
"Bytes Received": "2000468",
"Bytes Sent": "1893847",
"Connected Since": "2011-04-11 17:47:39 +0000"
},
"remote": [
{
"address": "78.7.85.162",
"port": "1194",
"proto": "udp"
}</pre>
</div>
<div class="slide">
<h1>MVC</h1>
<ul>
<li>Although Sinatra doesn't force you...</li>
<li><code>controller/network/interfaces.rb</code> (routes)</li>
<li><code>lib/onboard/network/interface.rb</code> (backend logic)</li>
<li><code>views/network/interfaces.html.erubis</code> (templates)</li>
</ul>
</div>
<div class="slide">
<h1>Ancillary gem #1: <em>hierarchical_menu</em></h1>
<img src="img/screen/hmenu-onboard.png" style="height:15em;"/>
<a href="http://rubygems.org/gems/hierarchical_menu">http://rubygems.org/gems/hierarchical_menu</a>
</div>
<div class="slide">
<h1>Ancillary gem #1: <em>hierarchical_menu</em></h1>
<ul>
<li>Very simple JS + CSS + Plain Ruby</li>
<li><pre>root.add_path('/aaa/bbb/ccc/ddd', {
:name => 'test1',
:href => '/xxx/yyy/zzz.html',
:custom_info => SomeStuff
})</pre></li>
<li><pre>root.to_html_ul do |node, output|
if node.content[:custom_info].some_check
output[:extra_class] = 'hmenu-selected' # Expand
output[:href] = nil # No hyperref
end
end</pre></li>
</ul>
</div>
<div class="slide">
<div class="part"><em>Core</em></div>
</div>
<div class="slide">
<h1 style="text-transform:none;">Netfilter (aka <code style="color:inherit;">iptables</code>)</h1>
<a href="img/screen/firewall.png" target="_blank"><img src="img/screen/firewall.png" style="height:15em;"/></a>
</div>
<div class="slide">
<h1>IPv6</h1>
<a href="img/screen/interfaces+ipv6.png" target="_blank"><img src="img/screen/interfaces+ipv6.png" style="width:35em;"/></a>
</div>
<div class="slide">
<h1>Bridging</h1>
<a href="img/screen/bridge.png" target="_blank"><img src="img/screen/bridge.png" style="height:15em;"/></a>
</div>
<div class="slide">
<h1>Policy Routing</h1>
<ul>
<li>Route traffic according to its...</li>
<li>...source</li>
<li>...incoming network interface</li>
<li>...incoming physical port (within a bridge)</li>
<li>...QoS classification (DSCP)</li>
</ul>
</div>
<div class="slide">
<h1>Policy Routing</h1>
<ul>
<li>Full power of <code>ip rule</code> and <code>iptables -t mangle</code></li>
<li>As a sidenote: there <em>is</em> a standard Unix way to listen on a TCP socket...</li>
<li>...but no portable way to assign IP addresses, IP routes, IP filters...</li>
<li>The rude and simple way: <code>system()</code></li>
<li>The sophisticated way: RTNETLINK (not my choice, though)</li>
</ul>
</div>
<div class="slide">
<h1>Policy Routing</h1>
<a href="img/screen/policy-routing-tables.png" target="_blank"><img src="img/screen/policy-routing-tables.png" style=""/></a>
</div>
<div class="slide">
<h1>Policy Routing</h1>
<a href="img/screen/policy-routing-rules.png" target="_blank"><img src="img/screen/policy-routing-rules.png" style=""/></a>
</div>
<div class="slide">
<div class="part"><em>Plugins (<code>modules/</code>)</em></div>
</div>
<div class="slide">
<h1>SSL and VPN</h1>
<img src="img/ovpn.howtoforge.jpg" style="float:right;"/>
<ul>
<li><code>modules/easy-rsa</code></li>
<li><code>modules/openvpn</code>
</ul>
</div>
<div class="slide">
<h1>SSL and VPN</h1>
<img src="img/screen/ovpn-details.png"/>
</div>
<div class="slide">
<h1>SSL and VPN</h1>
<img src="img/screen/ssl1.png"/>
</div>
<div class="slide">
<h1>SSL and VPN</h1>
<img src="img/screen/ssl2.png"/>
</div>
<div class="slide">
<h1>Captive portal, AAA</h1>
<div style="float:right;">
<img src="img/coova-logo.png"/><br/>
<img src="img/RADIUSAcct.preview.jpg"/><br/>
<img src="img/Chilli_2.preview.jpg"/><br/>
</div>
<ul>
<li><code>modules/chilli</code></li>
<li><code>modules/hotspotlogin</code></li>
<li><code>modules/radius-admin</code></li>
<li><code>modules/radius-core</code></li>
<li><em>hotspotlogin</em> gem</li>
</ul>
</div>
<div class="slide">
<h1>RADIUS Accounting</h1>
<a href="img/screen/radius-accounting.png" target="_blank"><img src="img/screen/radius-accounting.png" style="height:14em;"/></a>
</div>
<div class="slide">
<h1>Ancillary gem #2: <em>HotSpotLogin.rb</em></h1>
<img src="img/screen/hotspot_logged_in.jpg" style="float:right; height:15em;"/>
<ul>
<li>Sinatra-based (again ;-)</li>
<li>JS: queries the CoovaChilli JSON interface</li>
<li><a href="http://rubygems.org/gems/hotspotlogin">http://rubygems.org/gems/hotspotlogin</a>
</div>
<div class="slide">
<h1>Web Content Filter</h1>
<img src="img/screen/dansguardian-filtergroup.png" style="float:right;"/>
<ul>
<li><code>modules/dansguardian</code></li>
<li>
Ancillary gem #3, #4: <em>dansguardian</em> and <em>configfiles</em>
</li>
</ul>
</div>
<div class="slide">
<h1>Integrating Captive Portal and Web Filtering</h1>
<div style="float:right; line-height:0.4em;">
<img src="img/freeradius.png" style="margin-bottom:1ex;"/><br/>
<img src="img/dg.jpg" style="margin-bottom:0;"/>
<div style="margin-top:0; margin-bottom:1em;"><span style="font-size:24px;">DansGuardian</span></div>
</div>
<ul>
<li>User attempts to surf the web</li>
<li>Gets redirected to a login page</li>
<li>After authentication and authorization, traffic is accounted</li>
<li><b>Differentiated, transparent content filters</b> (according to which user you are and which group you belong)</li>
<li>Public WiFi, Schools, ...</li>
<li>Virus scanning, children safety...</li>
</ul>
</div>
<div class="slide">
<h1>Integrating Captive Portal and Web Filtering</h1>
<h2>The <em>SQLAuth</em> DansGuardian plugin</h2>
<a href="http://github.com/gderosa/dansguardian">http://github.com/gderosa/dansguardian</a></li>
<div style="float:right; line-height:0.4em;">
<img src="img/freeradius.png" style="margin-bottom:1ex;"/><br/>
<img src="img/dg.jpg" style="margin-bottom:0;"/>
<div style="margin-top:0; margin-bottom:1em;"><span style="font-size:24px;">DansGuardian</span></div>
</div>
<ul>
<li>Non-trivial (as the IP plugin)</li>
<li>OS/network architecture independent (compared to NTLM)</li>
<li>Compatible with <em>transparent</em> proxies (no Proxy-based Auth)</li>
<li>C++ development on top of the SOCI library</li>
</ul>
</div>
<div class="slide" style="text-align:center">
<h1>Virtualization: QEMU / KVM</h1>
<a href="img/screen/QEMU_Virtualization.overview.png" target="_blank"><img src="img/screen/QEMU_Virtualization.overview.png" style="height:16em"/></a>
</div>
<div class="slide">
<h1>Virtualization: Distributed storage: GlusterFS</h1>
<ul style="float:left;width:7%"><li>Build your own Cloud Infrastructure</li></ul>
<a href="img/screen/QEMU_Virtualization.GlusterFS.png" target="_blank"><img src="img/screen/QEMU_Virtualization.GlusterFS.png" style="width:70%;float:right"/></a>
</div>
<div class="slide">
<h1>Virtualization: USB Pass-through</h1>
<ul style="float:left;width:7%">
<li>Pass (real) hardware to Virtual Machines</li>
<li>Experimental support for USB 3.0</li>
</ul>
<a href="img/screen/QEMU_Virtualization.USBPassthrough.png" target="_blank"><img src="img/screen/QEMU_Virtualization.USBPassthrough.png" style="width:70%;float:right"/></a>
</div>
<div class="slide">
<h1>Virtualization: PCI Pass-through</h1>
<ul style="float:left;width:27%;font-size:90%;margin-right:none">
<li>Pass (real) hardware to Virtual Machines</li>
<li>Requires VT‑d/IOMMU support by CPU and mobo</li>
<li>MSI-enabled peripherials (almost any recent PCI/PCIe/PCI-X board)</li>
<li>Experimental support for Graphic cards</li>
</ul>
<a href="img/hardware-passed-through.jpg" target="_blank"><img src="img/hardware-passed-through.jpg" style="float:right; width:55%"/></a>
</div>
<div class="slide">
<div class="part">
<em>Anatomy of a module (or how to create your own)</em>
</div>
</div>
<div class="slide">
<h1>Plugin Anatomy</h1>
<ul>
<li>Same directory layout of core</li>
<li><code>Sinatra::Base</code> has been opened to allow multiple paths for static files and views</li>
<li>Installing and uninstalling is just a matter of copying or deleting a directory</li>
<li>Current example: the ChilliSpot module</li>
</ul>
</div>
<div class="slide">
<h1><code><span style="color:#888">modules/chilli/</span>load.rb</code></h1>
<pre>
class OnBoard
module Network
module AccessControl
class Chilli
ROOTDIR = File.dirname(__FILE__)
CONFDIR =
"#{OnBoard::CONFDIR}/network/access-control/chilli"
$LOAD_PATH.unshift ROOTDIR + '/lib'
if OnBoard.web?
OnBoard.find_n_load ROOTDIR + '/etc/menu'
OnBoard.find_n_load ROOTDIR + '/controller'
end
end
end
end
CHILLI_CLASS = Network::AccessControl::Chilli # a shortcut
end
</pre>
</div>
<div class="slide">
<h1>Menu</h1>
<h2><code>modules/chilli/<br/>etc/menu/network/access-control/chilli.rb</code></h2>
<pre>
class OnBoard
MENU_ROOT.add_path('/network/access-control/chilli', {
:href => '/network/access-control/chilli',
:name => '“Chilli” Controller',
:desc => 'Redirects unauthenticated users to a login page',
:n => 0,
:children => %r{^/network/access-control/chilli/.*}
})
end
</pre>
</div>
<div class="slide">
<h1>Sinatra routes</h1>
<h2><code>modules/chilli/<br/>controller/network/access-control/chilli.rb</code></h2>
<pre>
put '/network/access-control/chilli/:ifname.:format' do
...
else
raise CHILLI_CLASS::BadRequest, "UAM passwords do not match!"
end
else
raise CHILLI_CLASS::BadRequest, "Wrong UAM password!" unless
params['conf']['uamsecret'].length == 0 and
...
rescue CHILLI_CLASS::BadRequest
status 400
msg[:err] = $!
msg[:ok] = false
end
</pre>
</div>
<div class="slide">
<h1>The <code>format</code> helper</h1>
<h2><code>modules/chilli/<br/>controller/network/access-control/chilli.rb</code></h2>
<pre>
put '/network/access-control/chilli/:ifname.:format' do
...
# refresh
all = CHILLI_CLASS.getAll()
chilli = all.detect{|x| x.conf['dhcpif'] == params[:ifname]}
format(
:module => 'chilli',
:path => '/network/access-control/chilli/ifconfig',
:format => params[:format],
:objects => chilli,
:msg => msg
)
else
not_found
end
</pre>
</div>
<div class="slide">
<h1>Stuff under <code>lib/</code> ...</h1>
<h2><code>modules/chilli/<br/>lib/network/access-control/chilli.rb</code></h2>
<pre>
require 'onboard/extensions/ipaddr'
require 'onboard/system/process'
require 'onboard/network/interface'
require 'onboard/network/interface/ip'
class OnBoard
module Network
module AccessControl
class Chilli
...
class BadRequest < RuntimeError; end
...
</pre>
</div>
<div class="slide">
<h1>Stuff under <code>lib/</code> ...</h1>
<h2><code>modules/chilli/<br/>lib/network/access-control/chilli.rb</code></h2>
<pre>
...
class Chilli
...
def self.parse_conffile(filename)
h = {}
return h unless File.exists? filename
File.foreach(filename) do |line|
line.sub! /#.*$/, ''
if line =~ /(\S+)\s+(.*)\s*$/
opt, arg = $1, $2
...
</pre>
</div>
<div class="slide">
<h1>Stuff under <code>lib/</code> ...</h1>
<h2><code>modules/chilli/<br/>lib/network/access-control/chilli.rb</code></h2>
<pre>
...
class Chilli
...
def self.parse_conffile(filename)
...
def self.create_from_HTTP_request(params)
...
def self.validate_conffile(h) # based on chilli_opt(1)
...
</pre>
</div>
<div class="slide">
<h1>Stuff under <code>lib/</code> ...</h1>
<h2><code>modules/chilli/<br/>lib/network/access-control/chilli.rb</code></h2>
<pre>
def initialize(h)
if h[:process]
# Running Chilli instance
@process = h[:process]
@conffile = conffile()
@conf = self.class.parse_conffile(@conffile)
@managed = managed?
elsif h[:conffile] and not h[:conf]
# Not running, but a configuration file exists
@process = nil
@conffile = h[:conffile]
@conf = self.class.parse_conffile(@conffile)
@managed = managed?
dynaconf_coaport unless @conf['coaport'].to_i > 0
elsif h[:conffile] and h[:conf]
# We will have to (over-)write a configuration file
@conffile = h[:conffile]
@managed true
@conf = h[:conf]
</pre>
</div>
<div class="slide">
<h1>Save and Restore</h1>
<h2><code>modules/chilli/<br/>lib/network/access-control/chilli.rb</code></h2>
<pre>
class Chilli
def self.save
FileUtils.mkdir_p File.dirname SAVED_DAT_FILE
all = getAll
File.open SAVED_DAT_FILE, 'w' do |f|
f.write Marshal.dump(getAll)
end
end
def self.restore
if File.exists? SAVED_DAT_FILE
all_saved = Marshal.load File.read SAVED_DAT_FILE
all_saved.map{|chilli| chilli.start if chilli.running?}
end
end
...
</pre>
</div>
<div class="slide">
<h1>SysV-like init hooks</h1>
<h2><code>modules/chilli/<br/>etc/restore/60chilli.rb</code></h2>
<pre>
require 'onboard/network/access-control/chilli'
OnBoard::Network::AccessControl::Chilli.restore
</pre>
<h2><code>modules/chilli/<br/>etc/save/chilli.rb</code></h2>
<pre>
require 'onboard/network/access-control/chilli'
OnBoard::Network::AccessControl::Chilli.save
</pre>
</div>
<div class="slide">
<h1>Want to develop?</h1>
<ul>
<li>Ok, you deserve better docs ;-)</li>
<li>
Most wanted plugins:
<ul>
<li>IPSec vpn (talk to Cisco devices and mobile clients)</li>
<li>Intrusion detection (Snort)</li>
<li>VLAN</li>
<li>PPPoE, PPPoA</li>
</ul>
</li>
<li>GPL</li>
</ul>
</div>
<div class="slide">
<h1>Fork me on GitHub</h1>
<ul>
<li><a href="http://github.com/vemarsas/onboard">http://github.com/vemarsas/onboard</a> (and other projects)</li>
<li><a href="http://www.margay.it/">http://www.margay.it/</a></li>
<li>guido.derosa | antonello.ventre <em>@</em> vemarsas.it</li>
<li>Thanks a lot!</li>
</div>
</div>
</body>
</html>