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+<html>
+	<head>
+		<meta charset="UTF-8">	
+		<title>06 - preparation (isc_dhcp_live_boot)</title>
+	</head>
+
+	<body>
+		<h1 style="color:blue">06 - preparation (isc_dhcp_live_boot)</h1>
+		<h2>Table of contents</h2>
+		<ul>
+			<li><a href="#namen">Purpose of this exercise</a></li>
+			<li><a href="#navidezniRacunalniki">Virtual machines, needed for the purpose of exercise</a></li>
+			<li><a 
+href="#skicaPodomrezja">Schematics of our subnet</a></li>
+			<li><a href="#simpleArbiterGW">Setting up simpleArbiterGW</a></li>
+			<li><a href="#DHCP">Setting up DHCP Server</a></li>
+			<li><a href="#clientA">Setting BootableClient A</a></li>
+			<li><a href="#clientB">Setting up BootableClient B</a></li>
+		</ul>
+
+
+		<h2 id="namen">Purpose of this exercise</h2>
+		<p>How to perform live boot using a DHCP server.</p>
+
+		<h2 id="navidezniRacunalniki">Virtual machines needed to perform the task.</h2>
+		<p>We need VirtualBox and the following 4 virtual 
+machines:
+			<ul>
+				<li><a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterGW.vdi">simpleArbiterGW</a></li>
+				<li><a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterDhcp.vdi">DHCP Server</a></li>
+				<li>Bootable Client A (diskless 
+machine)</li>
+				<li>Bootable Client B (diskless 
+machine)</li>
+			</ul>
+		</p>
+
+		<h2 id="skicaPodomrezja">Schematics of our subnet</h2>
+		<img style="width: 800px; height: 610px;" src="../images/01.png" alt="slika-01"></img>
+		<p>Our goal is to make BootableClient A get it's IP 
+through DHCP server and boot up using file 
+A, which is located on simpleArbiterGW,</br>If we run 
+BootableClient B  machines, we would like it to retrieve it's IP 
+through DHCP server and boot from some live ISO which is also located on 
+SimpleArbiterGW.
+	    </p>
+
+	    <h2 id="simpleArbiterGW">Setting up <mark>simpleArbiterGW</mark></h2>
+	    <p>Download <a 
+href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterGW.vdi">simpleArbiterGW.vdi</a> 
+and then run VirtualBox. After the file is downloaded, choose the New 
+option in VirtualBoxu and set simpleArbiterGW in the Name 
+field.</br>Memory size, should be set accordingly (1gb will suffice). Then choose "Use an existing virtual hard drive file" and select simpleArbiterGW.vdi clicking Create.</p>
+		</br>
+	    <img style="width: 800px; height: 464px;" src="../images/02.png" alt="slika-02"></img>
+	    <p>We start our virtual machines simpleArbiterGW using the 
+following login 
+credentials; username: "root",  password: "kaboom".</br></br>
+	    At the start, the computer on NAt get's it's IP(in our case 10.0.2.15).</br>(to check this use<b>ifconfig</b>) We now use this address and eth0 interface to access the internet.<p>
+	    <img style="width: 800px; height: 384px;" src="../images/03.png" alt="slika-03"></img>
+	    <p>However, we would like this machine to have 2 
+interfaces! One on NAT(we already have this one), and the other one on Internal Network,</br>throuh which we will communicate wiht the DHCP Server and other machines on our Internal Network.</br></br>
+	    We add a new interface, by turning off the virtual machine, 
+select our machine in VirtualBox and select   
+računalnik, ter v VirtualBoxu <b>Settings -> Network</b></br>
+	    <b>Adapter</b> 1 is already set to NAT, we set <b>Adapter 
+2</b> to
+Internal Network</p>
+	    <img style="width: 800px; height: 137px;" src="../images/04.png" alt="slika-04"></img>
+	    <p>So, now we have two network interfaces!</br>In VirtuaBox 
+we can define multiple Internal Networks, however, for our needs two 
+will suffice. We save the settings and restart simpleArbiterGW.</br></br>
+	    What we must do now, is to assign both interfaces IP addresses. We do this by setting the<b>interfaces</b>file 
+	    located at<b>/etc/network</b>.</p>
+	    <img style="width: 800px; height: 229px;" src="../images/05.png" alt="slika-05"></img>
+	    <p>Eth0 was already handled by and integrated DHCP, so eth0 had been assigned an IP).</br>
+		We have to set up the other network interface. If we don't know it's name, we find it out using <b>ifconfig -a</b>.</p>
+		<img style="width: 800px; height: 117px;" src="../images/06.png" alt="slika-06"></img>
+		<p>We can conclude the interface names is set to Eth1.
+		Now we would like to assign an IP naslov to Eth1.</br>
+		Ifconfig could be used, but rebooting the machine would reset the settings. Which is not ideal :)</br>
+		So configuring  <b>/etc/network/interfaces would be a better idea.</b></br></br>
+		Let's make up a random local network or a local area network or local area network address and assign it to eth1.
+		</p>
+		<img style="width: 800px; height: 296px;" src="../images/07.png" alt="slika-07"></img>
+		<p>We save the config file. Our machine still has no IP on eth1 so we use the <b>ifup eth1</b> command</p>
+        <img style="width: 800px; height: 23px;" src="../images/08.png" alt="slika-08"></img></br>
+        <p>Now we use the <b>ifconfig</b> command, to see whether and ip is assigned to eth1 interface</p>
+        <img style="width: 800px; height: 389px;" src="../images/09.png" alt="slika-09"></img>
+        <p>We can see the IP is set. Now let's set up the DHCP 
+Server!</p>
+
+        <h2 id="DHCP">Setting up <mark>DHCP Server</mark></h2>
+	    <p>We download  <a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterDhcp.vdi">simpleArbiterDhcp.vdi</a> and start VirtualBox. After the file had been dowloaded we select New in VirtualBoxu and unde rthe Name tag write DHCP Server.</br>We set the Memory size accordingly(1gb of memory should be sufficient). We also select "Use an existing virtual hard drive file" and select the simpleArbiterDhcp and press Create.</p>
+		</br>
+	    <img style="width: 800px; height: 464px;" src="../images/10.png" alt="slika-10"></img>
+	    <p>We run DHCP Server virtual machine and login using "root" ad username and "kaboom" as password.</br></br>
+	    <p>At first, our machine has no assigned IP, since none was set! Let+s configure it in <b>/etc/network/interfaces</b>.</br>But which interface should we configure? Using <b>ifconfig -a</b> command, we see it's <b>eth0</b>interface.<br>
+	    Again we select our IP address.</p>
+	    <img style="width: 800px; height: 283px;" src="../images/11.png" alt="slika-11"></img>
+	    <p>We save the configuration file. Our computer still has no IP address assigned to eth0, so using <b>ifdown eth0</b> and then <b>ifup eth0</b>we provide one.</p>
+        <img style="width: 800px; height: 25px;" src="../images/12.png" alt="slika-12"></img>
+        <p>Now let us use <b>ifconfig</b> command, to check whether there is an IP assigned to interface eth0</p>
+        <img style="width: 800px; height: 329px;" src="../images/13.png" alt="slika-13"></img>
+        <p>We got it! We install DHCP server using <b>apt-get install isc-dhcp-server</b></p>
+        <img style="width: 800px; height: 322px;" src="../images/14.png" alt="slika-14"></img>
+        <p>We see a bunch of errors. Why? Bacause, we have no internet access! <br>
+        We need to specify the Gateway for our inteface. Our Gateway will be set as IP of our simpleArbiter virtual machine.</br> We do this using the<b>route add default gw 192.168.251.1 eth0</b> command</p>
+        <img style="width: 800px; height: 43px;" src="../images/15.png" alt="slika-15"></img>
+        <p>Try pinging Google's DNS server at 8.8.8.8, to check if now have internet access.</br>
+        We do this using the <b>ping 8.8.8.8</b> command.</p>
+        <img style="width: 800px; height: 361px;" src="../images/16.png" alt="slika-16"></img>
+        <p>Google's DNS server is responding. Great! </br>
+        However, we still cannot run <b>apt-get install isc-dhcp-server</b></br>
+    	Let's tempororly add another interface and set it to NAT, so we get internet access and install the DHCP server.</br></br>
+    	We add a new interface by turning off the virtual computer, in VirtualBox we select our virtual machine and then select <b>Settings -> Network</b></br>
+	    <b>Adapter 1</b> has already been set to Internal Network, we set <b>Adapter 2</b> to NAT</p>
+	    <img style="width: 800px; height: 134px;" src="../images/17.png" alt="slika-17"></img>
+	    <p>We run DHCP Server and in file<b>/etc/network/interfaces</b> at the end of the line add <b>iface eth1 inet dhcp</b>, then save the file and run <b>ifup eth1</b>.<br>
+	    Now we have access to the internet and can install our DHCP server with <b>apt-get install isc-dhcp-server install</b> command</br>
+	    <img style="width: 800px; height: 26px;" src="../images/18.png" alt="slika-18"></img></br>
+	    <p>Let's see what's in<b>/var/log/syslog</b>, which is a file where our system information is stored in.</p>
+	    <img style="width: 800px; height: 323px;" src="../images/19.png" alt="slika-19"></img></br>
+	    <p>Looks like we need to set up a DHCP server and specify where it should listen! </br>
+		DHCP settings are stored in <b>/etc/dhcp/dhcpd.conf</b>. Let's set it! </br>
+		First let's comment out <b>option domain-name-servers</b> to avoid having errors.</p>
+		<img style="width: 800px; height: 26px;" src="../images/20.png" alt="slika-20"></img></br>
+		<p>Then we configure DHCP server, so it would serve IPs a a certain subnet. We add the following lines:</p>
+		<img style="width: 800px; height: 417px;" src="../images/21.png" alt="slika-21"></img>
+		<p><b>(subnet)</b> We set the subnet and the IP range, which the DHCP server should use, and which file it should serve.</p>Some PXEs are so unintelligent, that you should specify where they should get the files from and to do that you specify next-server </br>(IP from which it will be served from, in our case simpleArbiter), we also specify gateway, which, in our case is also simpleArbiter.</br></br>Since we would like, that in the case of BootableClient B another file to be served, we do it by defining a special host like this:</br><b>(host special)</b> Under <b>hardware ethernet</b> we specifiy MAC address of our BootableClient B, we assign it a static ip and where the file <b>live-ISO</b> is located.</p>
+		<p>We save the settings and kill the process named <b>dnsmasq</b>using<b>kilall dnsmasq</b>.</p>
+		<img style="width: 740px; height: 34px;" src="../images/22.png" alt="slika-22"></img>
+		<p>We restart our DHCP server, to apply the new settings. This is done using <b>service isc-dhcp-server restart</b></br> command. DHCP server is now ready! We supply BootableClientA and BootableClientB and test them!</p>
+
+
+		<h2 id="clientA">Setting up <mark>BootableClient A</mark></h2>
+		<p>We open VirtualBox and select <b>New</b>, for the  
+<b>Name</b> field we specify
+BootableClient A and for the <b>Hard drive</b> we select <b>Do not add a 
+virtual 
+hard drive</b> (as we want diskless device), </br>and select Create. 
+We want the computer to be on Internal network so vse select our 
+<b>Bootable Client 
+A</b> and select </br><b>Settings->Network</b> where we change Adapter 
+1 to Internal Network.</p>
+		<img style="width: 800px; height: 678px;" src="../images/23.png" alt="slika-23"></img>
+		<p>We also want our computer to boot through the network, so 
+under<b>Boot Order</b>tab select <b>Network</b>.</br>
+		We save the setting by clicking <b>OK</b></p>
+		<img style="width: 800px; height: 697px;" src="../images/24.png" alt="slika-24"></img>
+		<p>We run our BootableClient-a A and it get's it's 
+IP(which is great), using the DHCP server and the simpleArbiter serves 
+it exactly the file we specified. <b>A.0</b></p> 
+		<img style="width: 800px; height: 494px;" src="../images/25.png" alt="slika-25"></img>
+
+
+
+		<h2 id="clientB">Setting up<mark>BootableClient 
+B</mark></h2>
+		<p>We open virtual box and select <b>New</b> and under the <b>Name</b> tag write BootableClient B and under the <b>Hard drive</b>tab choose <b>Do not add a virtual hard drive</b> (since we want a diskless machine), </br>and then press the Create button, which will create a virtual machine. We want our machine to be connected to out Internal network so we select <b>Bootable Client B</b> and then select </br><b>Settings->Network</b> and set the Adapter 1 to Internal Network.</br>
+		Under <b>MAC Address</b>  we specify the same MAC address that is specified in the (dhcpd.conf -> host special) file, since we want our machine to be an exception</br> and will be served a special file named<b>live-ISO</b></p>
+		<img style="width: 800px; height: 678px;" src="../images/26.png" alt="slika-26"></img>
+		<p>We want our machine to perform a netboot, so under the <b>System</b></p>   <b>Boot Order</b> tag specify only <b>Network</b>.</br>
+		We save the setting by clicking the <b>OK</b> button</p>
+		<img style="width: 800px; height: 697px;" src="../images/27.png" alt="slika-27"></img>
+		<p>We run our BootableClient-a A and it get's it's IP address using DHCP server and simpleArbiter serves it the file we selected called <b>live-ISO</b></p> 
+		<img style="width: 800px; height: 494px;" src="../images/28.png" alt="slika-28"></img>
+
+
+	</body>
+</html>
+
diff --git a/tasks/isc_dhcp_live_boot/howtos/en/indexEN.html b/tasks/isc_dhcp_live_boot/howtos/en/indexEN.html
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+<html>
+	<head>
+		<meta charset="UTF-8">	
+		<title>06 - preparation (isc_dhcp_live_boot)</title>
+	</head>
+
+	<body>
+		<h1 style="color:blue">06 - preparation (isc_dhcp_live_boot)</h1>
+		<h2>Table of contents</h2>
+		<ul>
+			<li><a href="#namen">Purpose of this exercise</a></li>
+			<li><a href="#navidezniRacunalniki">Virtual machines, needed for the purpose of exercise</a></li>
+			<li><a 
+href="#skicaPodomrezja">Schematics of our subnet</a></li>
+			<li><a href="#simpleArbiterGW">Setting up simpleArbiterGW</a></li>
+			<li><a href="#DHCP">Setting up DHCP Server</a></li>
+			<li><a href="#clientA">Setting BootableClient A</a></li>
+			<li><a href="#clientB">Setting up BootableClient B</a></li>
+		</ul>
+
+
+		<h2 id="namen">Purpose of this exercise</h2>
+		<p>How to perform live boot using a DHCP server.</p>
+
+		<h2 id="navidezniRacunalniki">Virtual machines needed to perform the task.</h2>
+		<p>We need VirtualBox and the following 4 virtual 
+machines:
+			<ul>
+				<li><a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterGW.vdi">simpleArbiterGW</a></li>
+				<li><a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterDhcp.vdi">DHCP Server</a></li>
+				<li>Bootable Client A (diskless 
+machine)</li>
+				<li>Bootable Client B (diskless 
+machine)</li>
+			</ul>
+		</p>
+
+		<h2 id="skicaPodomrezja">Schematics of our subnet</h2>
+		<img style="width: 800px; height: 610px;" src="../images/01.png" alt="slika-01"></img>
+		<p>Our goal is to make BootableClient A get it's IP 
+through DHCP server and boot up using file 
+A, which is located on simpleArbiterGW,</br>If we run 
+BootableClient B  machines, we would like it to retrieve it's IP 
+through DHCP server and boot from some live ISO which is also located on 
+SimpleArbiterGW.
+	    </p>
+
+	    <h2 id="simpleArbiterGW">Setting up <mark>simpleArbiterGW</mark></h2>
+	    <p>Download <a 
+href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterGW.vdi">simpleArbiterGW.vdi</a> 
+and then run VirtualBox. After the file is downloaded, choose the New 
+option in VirtualBoxu and set simpleArbiterGW in the Name 
+field.</br>Memory size should be set accordingly (1gb will suffice). Then choose "Use an existing virtual hard drive file" and select simpleArbiterGW.vdi clicking Create.</p>
+		</br>
+	    <img style="width: 800px; height: 464px;" src="../images/02.png" alt="slika-02"></img>
+	    <p>We start our virtual machines simpleArbiterGW using the 
+following login 
+credentials; username: "root",  password: "kaboom".</br></br>
+	    At the start, the computer on NAt get's it's IP(in our case 10.0.2.15).</br>(to check this use<b>ifconfig</b>) We now use this address and eth0 interface to access the internet.<p>
+	    <img style="width: 800px; height: 384px;" src="../images/03.png" alt="slika-03"></img>
+	    <p>However, we would like this machine to have 2 
+interfaces! One on NAT(we already have this one), and the other one on Internal Network,</br>throuh which we will communicate wiht the DHCP Server and other machines on our Internal Network.</br></br>
+	    We add a new interface, by turning off the virtual machine, 
+select our machine in VirtualBox and select   
+računalnik, ter v VirtualBoxu <b>Settings -> Network</b></br>
+	    <b>Adapter</b> 1 is already set to NAT, we set <b>Adapter 
+2</b> to
+Internal Network</p>
+	    <img style="width: 800px; height: 137px;" src="../images/04.png" alt="slika-04"></img>
+	    <p>So, now we have two network interfaces!</br>In VirtuaBox 
+we can define multiple Internal Networks, however, for our need's two 
+will suffice. We save the settings and restart simpleArbiterGW.</br></br>
+	    What we must do now, is to assign both interfaces IP addresses. We do this by setting the<b>interfaces</b>file 
+	    located at<b>/etc/network</b>.</p>
+	    <img style="width: 800px; height: 229px;" src="../images/05.png" alt="slika-05"></img>
+	    <p>Eth0 was already handled by and integrated DHCP, so eth0 had been assigned an IP).</br>
+		We have to set up the other network interface. If we don't know it's name, we find it out using <b>ifconfig -a</b>.</p>
+		<img style="width: 800px; height: 117px;" src="../images/06.png" alt="slika-06"></img>
+		<p>We can conclude the interface names is set to Eth1.
+		Now we would like to assign an IP naslov to Eth1.</br>
+		Ifconfig could be used, but rebooting the machine would reset the settings. Which is not ideal :)</br>
+		So configuring  <b>/etc/network/interfaces would be a better idea.</b></br></br>
+		Let's make up a random local network or a local area network or local area network address and assign it to eth1.
+		</p>
+		<img style="width: 800px; height: 296px;" src="../images/07.png" alt="slika-07"></img>
+		<p>We save the config file. Our machine still has no IP on eth1 so we use the <b>ifup eth1</b> command</p>
+        <img style="width: 800px; height: 23px;" src="../images/08.png" alt="slika-08"></img></br>
+        <p>Now we use the <b>ifconfig</b> command, to see whether and ip is assigned to eth1 interface</p>
+        <img style="width: 800px; height: 389px;" src="../images/09.png" alt="slika-09"></img>
+        <p>We can see the IP is set. Now let's set up the DHCP 
+Server!</p>
+
+        <h2 id="DHCP">Setting up <mark>DHCP Server</mark></h2>
+	    <p>We download  <a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterDhcp.vdi">simpleArbiterDhcp.vdi</a> ter zaženemo VirtualBox. Ko je datoteka prenesena v VirtualBoxu izberemo New ter v polje Name vpišemo DHCP Server.</br>Ustrezno nastavimo tudi Memory size (1gb pomnilnika nam bo zadostovalo). Spodaj izberemo še "Use an existing virtual hard drive file" ter izberemo naš simpleArbiterDhcp in pritisnimo Create.</p>
+		</br>
+	    <img style="width: 800px; height: 464px;" src="../images/10.png" alt="slika-10"></img>
+	    <p>We run DHCP Server virtual machine and login using "root" ad username and "kaboom" as password.</br></br>
+	    <p>At first, our machine has no assigned IP, since none was set! Let+s configure it in <b>/etc/network/interfaces</b>.</br>But which interface should we configure? Using <b>ifconfig -a</b> command, we see it's <b>eth0</b>interface.<br>
+	    Again we select our IP address.</p>
+	    <img style="width: 800px; height: 283px;" src="../images/11.png" alt="slika-11"></img>
+	    <p>We save the configuration file. Our computer still has no IP address assigned to eth0, so using <b>ifdown eth0</b> and then <b>ifup eth0</b>we provide one.</p>
+        <img style="width: 800px; height: 25px;" src="../images/12.png" alt="slika-12"></img>
+        <p>Now let us use <b>ifconfig</b> command, to check whether there is an IP assigned to interface eth0</p>
+        <img style="width: 800px; height: 329px;" src="../images/13.png" alt="slika-13"></img>
+        <p>We got it! We install DHCP server using <b>apt-get install isc-dhcp-server</b></p>
+        <img style="width: 800px; height: 322px;" src="../images/14.png" alt="slika-14"></img>
+        <p>We see a bunch of errors. Why? Bacause, we have no internet access! <br>
+        We need to specify the Gateway for our inteface. Our Gateway bo seveda IP našega simpleArbiter navideznega računalnika.</br> To naredimo s pomočjo ukaza <b>route add default gw 192.168.251.1 eth0</b></p>
+        <img style="width: 800px; height: 43px;" src="../images/15.png" alt="slika-15"></img>
+        <p>Try pinging Google's DNS server at 8.8.8.8, to check if now have internet access.</br>
+        We do this using the <b>ping 8.8.8.8</b> command.</p>
+        <img style="width: 800px; height: 361px;" src="../images/16.png" alt="slika-16"></img>
+        <p>Google's DNS server is responding. Great! </br>
+        However, we still cannot run <b>apt-get install isc-dhcp-server</b></br>
+    	Let's tempororly add another interface and set it to NAT, so we get internet access and install the DHCP server.</br></br>
+    	We add a new interface by turning off the virtual computer, in VirtualBox we select our virtual machine and then select <b>Settings -> Network</b></br>
+	    <b>Adapter 1</b> has already been set to Internal Network, we set <b>Adapter 2</b> to NAT</p>
+	    <img style="width: 800px; height: 134px;" src="../images/17.png" alt="slika-17"></img>
+	    <p>We run DHCP Server and in file<b>/etc/network/interfaces</b> at the end of the line add <b>iface eth1 inet dhcp</b>, then save the file and run <b>ifup eth1</b>.<br>
+	    Now we have access to the internet and can install our DHCP server with <b>apt-get install isc-dhcp-server install</b> command</br>
+	    <img style="width: 800px; height: 26px;" src="../images/18.png" alt="slika-18"></img></br>
+	    <p>Let's see what's in<b>/var/log/syslog</b>, which is a file where our system information is stored in.</p>
+	    <img style="width: 800px; height: 323px;" src="../images/19.png" alt="slika-19"></img></br>
+	    <p>Looks like we need to set up a DHCP server and specify where it should listen! </br>
+		DHCP settings are stored in <b>/etc/dhcp/dhcpd.conf</b>. Let's set it! </br>
+		First let's comment out <b>option domain-name-servers</b> to avoid having errors.</p>
+		<img style="width: 800px; height: 26px;" src="../images/20.png" alt="slika-20"></img></br>
+		<p>Then we configure DHCP server, so it would serve IPs a a certain subnet. We add the following lines:</p>
+		<img style="width: 800px; height: 417px;" src="../images/21.png" alt="slika-21"></img>
+		<p><b>(subnet)</b> We set the subnet and the IP range, which the DHCP server should use, and which file it should serve.</p>Some PXEs are so unintelligent, that you should specify where they should get the files from and to do that you specify next-server </br>(IP from which it will be served from, in our case simpleArbiter), we also specify gateway, which, in our case is also simpleArbiter.</br></br>Ker bi radi, da v primeru zagona navideznega računalnika BootableClient B serviramo drugo datoteko, to naredimo tako da definiramo nek dodaten host na sledeč način:</br><b>(host special)</b> Pod <b>hardware ethernet</b> zapišemo MAC naslov našega BootableClient B katerega bo imel, dodelimo mu nek statičen ip naslov ter povemo še iz kje se naj datoteka <b>live-ISO</b> zažene.</p>
+		<p>We save the settings and kill terthe process with ubijemo named <b>dnsmasq</b>using<b>kilall dnsmasq</b>.</p>
+		<img style="width: 740px; height: 34px;" src="../images/22.png" alt="slika-22"></img>
+		<p>Sledi restart našega DHCP strežnika, da bo deloval z novimi nastavitvami, to naredimo z ukazom <b>service isc-dhcp-server restart</b></br>DHCP server is now ready! We supply BootableClientA and BootableClientB and test them!</p>
+
+
+		<h2 id="clientA">Postavitev <mark>BootableClient A</mark></h2>
+		<p>We open VirtualBox and select <b>New</b>, for the y 
+<b>Name</b> field we specify
+BootableClient A and for the <b>Hard drive</b> we select <b>Do not add a 
+virtual 
+hard drive</b> (as we want diskless device), </br>and select Create. 
+We want the computer to be on Internal network so vse select our 
+<b>Bootable Client 
+A</b> and select </br><b>Settings->Network</b> where we change Adapter 
+1 to Internal Network.</p>
+		<img style="width: 800px; height: 678px;" src="../images/23.png" alt="slika-23"></img>
+		<p>We also wan our computer to boot through network, so 
+under<b>Boot Order</b>tab select <b>Network</b>.</br>
+		We save the setting by clicking <b>OK</b></p>
+		<img style="width: 800px; height: 697px;" src="../images/24.png" alt="slika-24"></img>
+		<p>We run our BootableClient-a A and it get's it's 
+IP(which is great), using the DHCP server and the simpleArbiter serves 
+it exactly the file we specified. <b>A.0</b></p> 
+		<img style="width: 800px; height: 494px;" src="../images/25.png" alt="slika-25"></img>
+
+
+
+		<h2 id="clientB">Setting up<mark>BootableClient 
+B</mark></h2>
+		<p>Odpremo VirtualBox ter izberemo <b>New</b> in pod <b>Name</b> napišemo BootableClient B ter pod <b>Hard drive</b> izberemo <b>Do not add a virtual hard drive</b> (saj si želimo računalnik brez diska), </br>in pritisnemo na gump Create, da se nam ustvari navidezni računalnik. Želimo, da bo računalnik priklopljen na Internal network zato označimo naš <b>Bootable Client B</b> ter pritisnimo na </br><b>Settings->Network</b> in prvi Adapter 1 spremenimo na Internal Network.</br>
+		Poleg tega nastavimo še pod <b>MAC Address</b> takšen MAC naslov, kot ga imamo v nastavitvah DHCP strežnika (dhcpd.conf -> host special), saj želimo da bo ta naš računalnik izjema</br> in bo ob zagonu dobil drugo datoteko kot ostali in sicer <b>live-ISO</b></p>
+		<img style="width: 800px; height: 678px;" src="../images/26.png" alt="slika-26"></img>
+		<p>Želimo še, da se računalnik boot-a preko mreže, zato to nastavimo pod zavihkom <b>System</b></p> tako, da pod <b>Boot Order</b>  obkljukamo samo <b>Network</b>.</br>
+		Nastavitve shranimo z pritiskom na gumb <b>OK</b></p>
+		<img style="width: 800px; height: 697px;" src="../images/27.png" alt="slika-27"></img>
+		<p>Poženemo našega BootableClient-a A in odličnoo, dobi ip naslov s pomočjo DHCP strežnika in simpleArbiter mu servira točno to datoteko katero si želimo <b>live-ISO</b></p> 
+		<img style="width: 800px; height: 494px;" src="../images/28.png" alt="slika-28"></img>
+
+
+	</body>
+</html>
+
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+<html>
+	<head>
+		<meta charset="UTF-8">	
+		<title>06 - preparation (isc_dhcp_live_boot)</title>
+	</head>
+
+	<body>
+		<h1 style="color:blue">06 - preparation (isc_dhcp_live_boot)</h1>
+		<h2>Kazalo</h2>
+		<ul>
+			<li><a href="#namen">Namen vaje</a></li>
+			<li><a href="#navidezniRacunalniki">Navidezni računalniki, ki so potrebni za izvedbo naloge</a></li>
+			<li><a href="#skicaPodomrezja">Skica našega podomrežja</a></li>
+			<li><a href="#simpleArbiterGW">Postavitev simpleArbiterGW</a></li>
+			<li><a href="#DHCP">Postavitev DHCP Server</a></li>
+			<li><a href="#clientA">Postavitev BootableClient A</a></li>
+			<li><a href="#clientB">Postavitev BootableClient B</a></li>
+		</ul>
+
+
+		<h2 id="namen">Namen vaje</h2>
+		<p>Kako narediti live boot z DHCP strežnikom.</p>
+
+		<h2 id="navidezniRacunalniki">Navidezni računalniki, ki so potrebni za izvedbo naloge</h2>
+		<p>Potrebujemo program VirtualBox ter naslednje 4 navidezne računalnike:
+			<ul>
+				<li><a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterGW.vdi">simpleArbiterGW</a></li>
+				<li><a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterDhcp.vdi">DHCP Server</a></li>
+				<li>Bootable Client A (računalnik brez diska)</li>
+				<li>Bootable Client B (računalnik brez diska)</li>
+			</ul>
+		</p>
+
+		<h2 id="skicaPodomrezja">Skica našega podomrežja</h2>
+		<img style="width: 800px; height: 610px;" src="../images/01.png" alt="slika-01"></img>
+		<p>Naš cilj je, da računalnik BootableClient A preko DHCP strežnika pridobil IP naslov ter se zažene z datoteko A, ki se nahaja na simpleArbiterGW,</br>če pa zaženemo računalnik BootableClient B pa si želimo, da ta preko DHCP strežnika pridobi IP naslov ter se zažene z nekim live ISO, ki se prav tako nahaja na simpleArbiterGW.
+	    </p>
+
+	    <h2 id="simpleArbiterGW">Postavitev <mark>simpleArbiterGW</mark></h2>
+	    <p>Prenesemo  <a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterGW.vdi">simpleArbiterGW.vdi</a> ter zaženemo VirtualBox. Ko je datoteka prenesena v VirtualBoxu izberemo New ter v polje Name vpišemo simpleArbiterGW.</br>Ustrezno nastavimo tudi Memory size (1gb pomnilnika nam bo zadostovalo). Spodaj izberemo še "Use an existing virtual hard drive file" ter izberemo naš simpleArbiterGW.vdi in pritisnimo Create.</p>
+		</br>
+	    <img style="width: 800px; height: 464px;" src="../images/02.png" alt="slika-02"></img>
+	    <p>Nato zaženemo virtualni računalnik simpleArbiterGW ter se z uporabniškim imenom "root" ter geslom "kaboom" vpišemo v naš sistem.</br></br>
+	    Prvo računalnik od NAT-a, kateri je vgrajen v VirtualBox dobi nek naslov (v našem primeru 10.0.2.15).</br>(Da to preverimo uporabimo ukaz <b>ifconfig</b>) Preko tega IP naslova in vmesnika eth0 smo povezani v internet.<p>
+	    <img style="width: 800px; height: 384px;" src="../images/03.png" alt="slika-03"></img>
+	    <p>Mi pa si želimo 2 omrežna vmesnika na tem računalniku! Enega bi radi imeli na NAT (tega že imamo) drugega pa na Internal Network,</br>preko katerega bomo komunicirali z DHCP Strežnikom ter ostalimi računalniki, ki bodo v našem Internal Network-u.</br></br>
+	    Nov omrežni vmesnik dodamo tako, da ugasnemo naš virtualni računalnik, ter v VirtualBoxu označimo naš virtualni računalnik in pritisnemo na <b>Settings -> Network</b></br>
+	    <b>Adapter</b> 1 imamo že nastavljeno na NAT, <b>Adapter 2</b> pa nastavimo na Internal Network</p>
+	    <img style="width: 800px; height: 137px;" src="../images/04.png" alt="slika-04"></img>
+	    <p>Tako, zdaj imamo nastavljena 2 vmesnika!</br>V VirtualBoxu lahko definiramo več Internal Networkov (notranjih omrežij) a za naše potrebe bo to dovolj. Shranimo nastavitve ter ponovno poženimo naš simpleArbiterGW.</br></br>
+	    Zdaj moramo oba omrežna vmesnika nastaviti tako, da bosta imela nek naslov. Uredimo datoteko <b>interfaces</b> v imeniku 
+	    <b>/etc/network</b>.</p>
+	    <img style="width: 800px; height: 229px;" src="../images/05.png" alt="slika-05"></img>
+	    <p>Za eth0 je poskrbel že DHCP strežnik, ki je vgrajen v VirtualBox (na eth0 je določil nek IP).</br>
+		Mi moramo nastaviti še drugi mrežni vmesnik. Kako se imenuje iz glave ne vemo zato s pomočjo ukaza <b>ifconfig -a</b> pogledamo.</p>
+		<img style="width: 800px; height: 117px;" src="../images/06.png" alt="slika-06"></img>
+		<p>Ugotovimo da je ime vmesnika eth1.
+		Zdaj bi rad na eth1 nastavil en IP naslov.</br>
+		Lahko bi nastavil z ifconfig, a ko rebootaš računalnik se nastavitve ne ohranijo. To nebi radi!</br>
+		Pojdimo raje skonfigurirat nastavitve v <b>/etc/network/interfaces</b></br></br>
+		Izmislimo si eno naključno lokalno omrežje oz naslov lokalnega omrežja ter nastavimo eth1.
+		</p>
+		<img style="width: 800px; height: 296px;" src="../images/07.png" alt="slika-07"></img>
+		<p>Shranimo konfiguracijsko datoteko. Moj računalnik še nima IP-ja na eth1 zato uporabim ukaz <b>ifup eth1</b></p>
+        <img style="width: 800px; height: 23px;" src="../images/08.png" alt="slika-08"></img></br>
+        <p>Sedaj uporabimo ukaz <b>ifconfig</b>, da vidimo če imamo slučajno ip na vmesniku eth1</p>
+        <img style="width: 800px; height: 389px;" src="../images/09.png" alt="slika-09"></img>
+        <p>Vidim, da ip imam. Super! Gremo postavit DHCP Server!</p>
+
+        <h2 id="DHCP">Postavitev <mark>DHCP Server</mark></h2>
+	    <p>Prenesemo  <a href="http://www.polz.si/media/uploads/kpov/virtualke/simpleArbiterDhcp.vdi">simpleArbiterDhcp.vdi</a> ter zaženemo VirtualBox. Ko je datoteka prenesena v VirtualBoxu izberemo New ter v polje Name vpišemo DHCP Server.</br>Ustrezno nastavimo tudi Memory size (1gb pomnilnika nam bo zadostovalo). Spodaj izberemo še "Use an existing virtual hard drive file" ter izberemo naš simpleArbiterDhcp in pritisnimo Create.<br>Ustrezno nastavimo tudi nastavitve mreže iz NAT na Internal Network</p>
+		</br>
+	    <img style="width: 800px; height: 464px;" src="../images/10.png" alt="slika-10"></img>
+	    <p>Nato zaženemo virtualni računalnik DHCP Server ter se z uporabniškim imenom "root" ter geslom "kaboom" vpišemo v naš sistem.</br></br>
+	    <p>Sprva naš računalnik nima nobenega ip-ja saj mu ga nismo nastavili! Pojdimo skonfigurirat nastavitve v <b>/etc/network/interfaces</b>.</br>Ampak kateri vmesnik sploh konfiguriramo? Z ukazom <b>ifconfig -a</b> ugotovimo da je to <b>eth0</b>.<br>
+	    Spet si izberemo nek svoj statičen ip naslov.</p>
+	    <img style="width: 800px; height: 283px;" src="../images/11.png" alt="slika-11"></img>
+	    <p>Shranimo konfiguracijsko datoteko. Moj računalnik še nima IP-ja na eth0 zato uporabim ukaz <b>ifdown eth0</b> ter nato še <b>ifup eth0</b></p>
+        <img style="width: 800px; height: 25px;" src="../images/12.png" alt="slika-12"></img>
+        <p>Sedaj uporabimo ukaz <b>ifconfig</b>, da vidimo če imamo slučajno ip na vmesniku eth0</p>
+        <img style="width: 800px; height: 329px;" src="../images/13.png" alt="slika-13"></img>
+        <p>Hura imamo! Namestimo naš DHCP strežnik z ukazom <b>apt-get install isc-dhcp-server</b></p>
+        <img style="width: 800px; height: 322px;" src="../images/14.png" alt="slika-14"></img>
+        <p>Vidimo, da dobimo cel kup napak. Ampak zakaj? Zato, ker nimamo dostopa do interneta! <br>
+        Vmesniku eth0 moramo seveda povedati Gateway. Naš Gateway bo seveda IP našega simpleArbiter navideznega računalnika.</br> To naredimo s pomočjo ukaza <b>route add default gw 192.168.251.1 eth0</b></p>
+        <img style="width: 800px; height: 43px;" src="../images/15.png" alt="slika-15"></img>
+        <p>Probajmo ping-ati Googlov DNS strežnik, da ugotovimo če imamo sedaj internet.</br>
+        To naredimo z ukazom <b>ping 8.8.8.8</b>.</p>
+        <img style="width: 800px; height: 361px;" src="../images/16.png" alt="slika-16"></img>
+        <p>Googlov DNS strežnik se odziva, super! </br>
+        Ampak <b>apt-get install isc-dhcp-server</b> še vedno ne moremo naložiti.</br>
+    	Začasno dodajmo še en mrežni vmesnik ter ga nastavimo na NAT, nato bomo dobili dostop do interneta ter lahko namestimo naš DHCP strežnik.</br></br>
+    	Nov omrežni vmesnik dodamo tako, da ugasnemo naš virtualni računalnik, ter v VirtualBoxu označimo naš virtualni računalnik in pritisnemo na <b>Settings -> Network</b></br>
+	    <b>Adapter 1</b> imamo že nastavljeno na Internal Network, <b>Adapter 2</b> pa nastavimo na NAT</p>
+	    <img style="width: 800px; height: 134px;" src="../images/17.png" alt="slika-17"></img>
+	    <p>Zaženemo naš DHCP Server in v  <b>/etc/network/interfaces</b> začasno na koncu dodamo vrstico <b>iface eth1 inet dhcp</b>,datoteko shranimo ter poženemo ukaz <b>ifup eth1</b>.<br>
+	    Sedaj imamo dostop do interneta in lahko namestimo naš DHCP strežnik z ukazom <b>apt-get install isc-dhcp-server install</b></br>
+	    <img style="width: 800px; height: 26px;" src="../images/18.png" alt="slika-18"></img></br>
+	    <p>Poglejmo kaj je v <b>/var/log/syslog</b>, to je datoteka kamor se shranjujejo sporočila kaj se dogaja v našem sistemu</p>
+	    <img style="width: 800px; height: 323px;" src="../images/19.png" alt="slika-19"></img></br>
+	    <p>Očitno moramo nastaviti dhcp strežnik ter mu povedati tudi kam naj posluša! </br>
+		Za nastavitve DHCP strežnika imamo <b>/etc/dhcp/dhcpd.conf</b>. Nastavimo jo! </br>
+		Prvo zakomentiramo <b>option domain-name-servers</b> zaradi tega da nebo napak da jih ne najde.</p>
+		<img style="width: 800px; height: 26px;" src="../images/20.png" alt="slika-20"></img></br>
+		<p>Nato skonfiguriramo dhcp strežnik, da bo serviral ip-je na nekem podomrežju. Dodamo naslednje zapise:</p>
+		<img style="width: 800px; height: 417px;" src="../images/21.png" alt="slika-21"></img>
+		<p><b>(subnet)</b> Nastavimo podomrežje ter območje naslovov od koder naj jih DHCP strežnik dodeli, katero datoteko naj servira,</br> poleg tega so eni PXE tako neumni, da če jim ti serviraš filename nevejo iz katerega serverja ga dobim, zato napišem še next-server </br>(ip od koder serviram, v našem primeru simpleArbiter), nastavim tudi gateway kateri je v našem primeru tudi simpleArbiter.</br></br>Ker bi radi, da v primeru zagona navideznega računalnika BootableClient B serviramo drugo datoteko, to naredimo tako da definiramo nek dodaten host na sledeč način:</br><b>(host special)</b> Pod <b>hardware ethernet</b> zapišemo MAC naslov našega BootableClient B katerega bo imel, dodelimo mu nek statičen ip naslov ter povemo še iz kje se naj datoteka <b>live-ISO</b> zažene.</p>
+		<p>Spremembe shranimo, ter ubijemo proces z imenom <b>dnsmasq</b> z ukazom <b>kilall dnsmasq</b>.</p>
+		<img style="width: 740px; height: 34px;" src="../images/22.png" alt="slika-22"></img>
+		<p>Sledi restart našega DHCP strežnika, da bo deloval z novimi nastavitvami, to naredimo z ukazom <b>service isc-dhcp-server restart</b></br>DHCP Strežnik je pripravljen! Pripravimo BootableClientA ter BootableClientB ter testirajmo!</p>
+
+
+		<h2 id="clientA">Postavitev <mark>BootableClient A</mark></h2>
+		<p>Odpremo VirtualBox ter izberemo <b>New</b> in pod <b>Name</b> napišemo BootableClient A ter pod <b>Hard drive</b> izberemo <b>Do not add a virtual hard drive</b> (saj si želimo računalnik brez diska), </br>in pritisnemo na gump Create, da se nam ustvari navidezni računalnik. Želimo, da bo računalnik priklopljen na Internal network zato označimo naš <b>Bootable Client A</b> ter pritisnimo na </br><b>Settings->Network</b> in prvi Adapter 1 spremenimo na Internal Network.</p>
+		<img style="width: 800px; height: 678px;" src="../images/23.png" alt="slika-23"></img>
+		<p>Želimo še, da se računalnik boot-a preko mreže, zato to nastavimo pod zavihkom <b>System</b></p> tako, da pod <b>Boot Order</b>  obkljukamo samo <b>Network</b>.</br>
+		Nastavitve shranimo z pritiskom na gumb <b>OK</b></p>
+		<img style="width: 800px; height: 697px;" src="../images/24.png" alt="slika-24"></img>
+		<p>Poženemo našega BootableClient-a A in odličnoo, dobi ip naslov s pomočjo DHCP strežnika in simpleArbiter mu servira točno to datoteko katero si želimo <b>A.0</b></p> 
+		<img style="width: 800px; height: 494px;" src="../images/25.png" alt="slika-25"></img>
+
+
+
+		<h2 id="clientB">Postavitev <mark>BootableClient B</mark></h2>
+		<p>Odpremo VirtualBox ter izberemo <b>New</b> in pod <b>Name</b> napišemo BootableClient B ter pod <b>Hard drive</b> izberemo <b>Do not add a virtual hard drive</b> (saj si želimo računalnik brez diska), </br>in pritisnemo na gump Create, da se nam ustvari navidezni računalnik. Želimo, da bo računalnik priklopljen na Internal network zato označimo naš <b>Bootable Client B</b> ter pritisnimo na </br><b>Settings->Network</b> in prvi Adapter 1 spremenimo na Internal Network.</br>
+		Poleg tega nastavimo še pod <b>MAC Address</b> takšen MAC naslov, kot ga imamo v nastavitvah DHCP strežnika (dhcpd.conf -> host special), saj želimo da bo ta naš računalnik izjema</br> in bo ob zagonu dobil drugo datoteko kot ostali in sicer <b>live-ISO</b></p>
+		<img style="width: 800px; height: 678px;" src="../images/26.png" alt="slika-26"></img>
+		<p>Želimo še, da se računalnik boot-a preko mreže, zato to nastavimo pod zavihkom <b>System</b></p> tako, da pod <b>Boot Order</b>  obkljukamo samo <b>Network</b>.</br>
+		Nastavitve shranimo z pritiskom na gumb <b>OK</b></p>
+		<img style="width: 800px; height: 697px;" src="../images/27.png" alt="slika-27"></img>
+		<p>Poženemo našega BootableClient-a A in odličnoo, dobi ip naslov s pomočjo DHCP strežnika in simpleArbiter mu servira točno to datoteko katero si želimo <b>live-ISO</b></p> 
+		<img style="width: 800px; height: 494px;" src="../images/28.png" alt="slika-28"></img>
+<h2 id="tftpInPxe">Postavitev <mark>TFTP strežnika in zagonskih datotek</mark></h2>
+	
+<p>Na SimpleArbiter namestimo TFTP strežnik z ukazom <b>apt-get install tftpd-hpa</b> in spremenimo IP v <b>"/etc/default/tftpd-hpa"</b> pod TFTP_ADDRES na "192.168.251.1".
+<br>Nato z ukazom <b>apt-get install syslinux</b> namestimo syslinux in skopiramo zagonsko datoteko iz "/usr/lib/syslinux/pxelinux.0" na "/srv/tftp/A.0.<br> Namestimo še NFS server z ukazom "apt-get install nfs-kernel-server" in v "/etc/exports" dodamo lokacijo mape, kjer se nahaja naša zagonska datoteka A.0, ter omogočimo branje ("/srv/tftp * (ro)").
+<br>V imeniku /srv/tftp ustvarimo mapo "pxelinux.cfg" in v njej ustvarimo datoteko z imenom default. Vanjo vpišemo :
+<br>DEFAULT vesamenu.c32
+<br>PROMPT 0
+<br>MENU TITLE isc-dhcp-live
+<br>LABEL iso
+<br> menu label Run
+<br> kernel vmlinuz
+<br> APPEND boot=casper netboot=nfs nfsroot=192.168.251.1:/srv/tftp/boot/ initrd=initrd.gz</p>
+	</body>
+</html>
+
diff --git a/tasks/isc_dhcp_live_boot/task.py b/tasks/isc_dhcp_live_boot/task.py
new file mode 100644
index 0000000..c1adc47
--- /dev/null
+++ b/tasks/isc_dhcp_live_boot/task.py
@@ -0,0 +1,222 @@
+# TODO: dokoncaj!
+# kpov_util should be imported by add_assignment.py
+
+instructions = {
+    'si': '''\
+<p>
+Postavi štiri navidezne računalnike: <em>simpleArbiter</em>, <em>DHCP_server</em>, <em>BootableClientA</em> in <em>BootableClientB</em>.
+
+<p>
+Na <em>DHCP_server</em> postavi strežnik DHCP s pomočjo ISC dhcp 3 na naslovu <code>{{IP_DHCP}}</code>. <em>SimpleArbiter</em> naj dobi <code>{{IP_GW}}</code>. <em>DHCP_server</em> naj ga uporabi kot privzeti prehod (angl. <em lang="en">gateway</em>).
+
+<p>
+Če se zaganja <em>BootableClientB</em>, naj se sistem zažene v datoteko z imenom <code>{{BOOT_FNAME}}</code>. Če se zaganja katerikoli drug, naj se sistem zažene z živega USB, ki ga predstavlja slika diska <code>bootable_usb</code>, ime datoteke z zagonskim nalagalnikom pa naj bo kakršno koli razen <code>{{BOOT_FNAME}}</code>.
+
+<p>
+Živi USB priklopite na na <em>DHCP_server</em> in z njega poberite datoteke, potrebne za zagon. Datoteke z nastavitvami za PXELinux, ki jih najdete na živem USB, <em>morajo</em> biti dostopne na korenskem imeniku strežnika TFTP.
+
+<p>
+Tako <em>BootableClientA</em> kot <em>BootableClientB</em> naj bosta brez diskov.
+''',
+    'en': '''\
+<p>
+Set up four virtual machines: <em>simpleArbiter</em>, <em>DHCP_server</em>, <em>BootableClientA</em> and <em>BootableClientB</em>.
+
+<p>
+On <em>DHCP_server</em>, set up a DHCP server using ISC dhcp 3. Set the IP address of this server to <code>{{IP_DHCP}}</code>. If <em>SimpleArbiter</em> requests an IP, have the DHCP server serve it <code>{{IP_GW}}</code>. <em>DHCP_server</em> should use <em>SimpleArbiter</em> as the gateway.
+
+<p>
+If <em>BootableClientB</em> tries to boot over the network, have the DHCP server tell it to boot from the file <code>{{BOOT_FNAME}}</code>. If any other system tries to boot over the network, have it boot from a live USB drive represented by the disk image <code>bootable_usb</code> and have the bootloader filename be different from <code>{{BOOT_FNAME}}</code>.
+
+<p>
+Connect the live USB to DHCP_server and copy the files neccessarry for it to boot. The PXELinux configuration files must be the same as the ones found on the live USB and <em>must</em> be accessible on the TFTP server root.
+
+<p>
+Both <em>BootableCLientA</em> and <em>BootableClientB</em> should be diskless.
+''',
+}
+
+computers = {
+    'DHCPServer': {
+        'disks': [
+            {   'name': 'student-DHCPServer',
+            },
+            {   'name': 'bootable_usb',
+                'options':{'readonly': False},
+                'parts': [ {'dev': 'sdb1', 'path':'/mnt'} ],
+            },
+        ],
+        'network_interfaces': [{'network': 'net1'}],
+        'flavor': 'm1.tiny',
+        'config_drive': False
+    },
+    'BootableClientA': {
+        'disks': [
+        ],
+        'network_interfaces': [{'network': 'net1'}],
+        'flavor': 'm1.tiny',
+        'config_drive': False
+    },
+    'BootableClientB': {
+        'disks': [
+        ],
+        'network_interfaces': [{'network': 'net1'}],
+        'flavor': 'm1.tiny',
+        'config_drive': False
+    },
+    'SimpleArbiter': {
+        'disks': [
+            {   'name': 'simpleArbiterGW',
+            },
+        ],
+        'network_interfaces': [{'network': 'net1'}, {'network': 'test-net'}],
+        'flavor': 'm1.tiny',
+        'config_drive': False
+    }
+}
+
+networks = { 'net1': {'public': False}, 'test-net': {'public': True} }
+
+params_meta = {
+    'IP_DHCP': {'descriptions': {'si': 'IP DHCP streznika'}, 'w': False, 'public': True, 'type':'IP', 'generated': True},
+    'IP_GW': {'descriptions': {'si': 'IP SimpleArbiterja'}, 'w': False, 'public': True, 'type':'IP', 'generated': True},
+    'MAC_BOOT': {'descriptions': {'si': 'MAC racunalnika, ki se zazene z ISO'}, 'w': True, 'public': True, 'type':'MAC', 'generated': False},
+    # 'IP_BOOT': {'descriptions': {'si': 'IP racunalnika, ki se zazene z ISO'}, 'w': True, 'public': True, 'type':'IP', 'generated': False},
+    'TFTP_STRING': {'descriptions': {'si': 'vsebina'}, 'w': False, 'public': False, 'type':'short', 'generated': True},
+    'BOOT_FNAME': {'descriptions': {'si': 'Ime datoteke'}, 'w': False, 'public': True, 'type': 'filename', 'generated': True},
+}
+
+def task(IP_DHCP, IP_GW, MAC_BOOT, BOOT_FNAME):
+    # check the IP
+    # TODO (polz): Do not use tabs instead of spaces!
+    import pexpect
+    import re
+    import tftpy
+    import io
+    import time
+    results={}
+    # TODO (polz): Please use pexpect instead of os.system, it's much nicer.
+    # Also, test your functions. This function was obviously never run.
+    # 
+    # check whether the fname served by the dhcp server is
+    # correct
+    # you should check the DHCP response from the server.
+    # You can use dhcpdump to get some packets, dhcping to create a
+    # DHCP Request. You may also use any other tool.
+    # If you choose to use dhcping, do not forget to set the hw address 
+    # and ip arguments. You can simply feed it MAC_BOOT and IP_BOOT.
+    # dhcping -h MAC_BOOT -c IP_BOOT -V -r
+    # could work (but you should test it)
+    ip_str = pexpect.run('ip addr show')
+    eth_re_str = r"ether (([0-9a-f]{{2}}:){{5}}[0-9a-f]{{2}})(.*)\r\n(.*){}(.*)\s(\w*)\r\n"
+    ip_re = re.search(eth_re_str.format(IP_GW), ip_str)
+    mac_SA = ip_re.group(1)
+    eth_dev_SA = ip_re.group(6)
+    dhcpdump = pexpect.spawn("sudo dhcpdump -i {}".format(eth_dev_SA))
+    time.sleep(2)
+    results['dhcping_other'] = pexpect.run('sudo dhcping -s {} -h {} -c {}'.format(
+        IP_DHCP, MAC_BOOT, IP_GW))
+    dhcpdump.expect('---------------------------------------------------------------------------')
+    results['dhcpdump_other_req'] = dhcpdump.before
+    dhcpdump.expect('---------------------------------------------------------------------------')
+    results['dhcpdump_other_reply'] = dhcpdump.before
+    dhcpdump.expect('---------------------------------------------------------------------------')
+    results['dhcpdump_other_release'] = dhcpdump.before
+    results['dhcping_SA'] = pexpect.run('sudo dhcping -s {} -h {} -c {}'.format(
+        IP_DHCP, mac_SA, IP_GW))
+    dhcpdump.expect('---------------------------------------------------------------------------')
+    results['dhcpdump_SA_req'] = dhcpdump.before
+    dhcpdump.expect('---------------------------------------------------------------------------')
+    results['dhcpdump_SA_reply'] = dhcpdump.before
+    dhcpdump.expect('---------------------------------------------------------------------------')
+    results['dhcpdump_SA_release'] = dhcpdump.before
+    dhcpdump.sendintr()
+    tftp_client = pexpect.spawn('tftp {}'.format(IP_DHCP))
+    tftp_client.expect(r'tftp>')
+    tftp_client.sendline('get pxelinux.cfg/default /dev/stdout')
+    tftp_client.expect(r'tftp>')
+    results['tftp_string'] = tftp_client.before
+    # check whether the fname served by the dhcp server is correct
+    # connect to the service in the special ISO
+    # check the MAC of the server on IP_BOOT
+    return results
+    
+def gen_params(user_id, params_meta):
+    params = dict()
+    r = random.Random(user_id)
+    net = kpov_util.IPv4_subnet_gen(r, '10.64.0.0/10', 24)
+    params['IP_DHCP'], params['IP_GW'] = kpov_util.IPv4_addr_gen(r, net, 2)
+    params['BOOT_FNAME'] = kpov_util.fname_gen(r)
+    params['TFTP_STRING'] = kpov_util.alnum_gen(r, 45) 
+    return params
+
+def task_check(results, params):
+    import re
+    score = 0
+    hints = [] 
+    #TO FINISH SCORING WE REQUIRE DICT KEYS AND FUNCTIONS gen_params AND task TO BE FINISHED
+    #POINTS FOR EACH TASK MAY BE ADJUSTED IN THE FUTURE
+    if results['dhcping_other'].find(params['IP_DHCP']) >= 0:
+        score += 1
+    else:
+        hints += ["DHCP wrong"]
+    if results['dhcping_SA'].find(params['IP_DHCP']) >= 0:
+        score += 1
+    else:
+        hints += ["DHCP wrong"]
+    p = re.search(r"FNAME:(.*)\.\r",
+        results['dhcpdump_other_reply'])
+    if p is not None:
+        other_fname = p.group(1).strip()
+    else:
+        other_fname = ''
+    if other_fname == params['BOOT_FNAME']:
+        score += 3
+    else:
+        hints += ["special fname wrong:" + other_fname]
+    p = re.search(r"FNAME:(.*)\.\r",
+        results['dhcpdump_SA_reply'])
+    if p is not None:
+        sa_fname = p.group(1).strip()
+    else:
+        sa_fname = ''
+    if sa_fname != params['BOOT_FNAME']:
+        score += 3
+    else:
+        hints += ["fname wrong:" + sa_fname]
+    try:
+        special_tftp = "# " + params['TFTP_STRING']
+        tftp_end = results['tftp_string'].split('\r\r\n')[-1]
+        assert tftp_end[:len(special_tftp)] == special_tftp
+        score += 2
+    except:
+        hints += ["tftp wrong"]
+    return score, hints
+
+def prepare_disks(templates, task_params, global_params):
+    d = templates['student-DHCPServer']
+    s = """# {}""".format(task_params['TFTP_STRING'])
+    d = templates['bootable_usb']
+    d.write_append('/mnt/syslinux.cfg', s)
+    d = templates['simpleArbiterGW']
+    s = """auto lo
+iface lo inet loopback
+
+auto ens3
+iface ens3 inet dhcp
+
+auto enp0s3
+iface enp0s3 inet dhcp
+
+auto ens4
+iface ens4 inet static
+    address {IP_GW}
+    netmask 255.192.0.0
+
+auto enp0s8
+iface enp0s8 inet static
+    address {IP_GW}
+    netmask 255.192.0.0
+""".format(IP_GW = task_params['IP_GW'])
+    d.write("/etc/network/interfaces", s)
+    write_default_config(templates['simpleArbiterGW'], global_params)