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<strong><h1>NAT VLC:</h1></strong>
<p><strong><h2>Naloga na hitro:</h2></strong><br>
Nastavi računalnik tako, da bo vse pakete za določene naslove prepošiljal na drug računalnik, vzpostavi NAT.</p>
<p><strong><h2>Navodila:</h2></strong>
<h3>1. Postavi dva navidezna računalnika. SimpleArbiter z diskom simpleArbiter ter NATServer. </h3>
Virtualke dobiš na (polz.si/media/uploads/kpov/virtualke). Za NATServer lahko uporabiš base-student-desktop-2014.
<br>
<h3>2. Postavi NAT server tako, da ima dva omrežna vmesnika. Z enim naj bo povezan na simpleArbiter, z drugim pa na internet.</h3>
(settings-Network) Adapter 1 nastavimo na NAT (omrežje), adapter 2 pa na InternalNetwork (lokalno).<br>
Simple Arbiter nastavimo na InternalNetwork(lokalno).
<br>
<img style="width: 500px; height: 310px;" src="../images/1.jpg" alt="slika-1"></img>
<h3>3.Na NATServer z ukazom ifconfig in z datoteko /etc/network/interfaces skonfiguriraj omrežne vmesnike<br>
tako, da bo en povezan v WAN (internet) in en vmesnik na LAN (simpleArbiter).</h3>
-vim /etc/network/interfaces<br>
-dopišemo:<br>
auto eth1<br>
iface eth1 inet static<br>
NETMASK 255.255.0.0 # Specify based on your requirement<br>
IPADDR 192.168.2.1 # Gateway of the LAN<br>
NETWORK 192.168.0.0 # Optional<br>
ADDRESS 192.168.0.0 <br>
-ifdown eth1<br>
-ifup eth1
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<img style="width: 500px; height: 310px;" src="../images/2.jpg" alt="slika-2"></img>
<h3>4. SimpleArbiter skofiguriraj tako, da bo privzeti prehod uporabljal NATServer.</h3>
<h3> 5. Nastavi DNS (etc/resolv.conf) na NATServerju.</h3>
vim /etc/resolv.conf
nameserver 203.145.184.13 # Primary DNS Server provided by the ISP<br>
nameserver 202.56.250.5 # Secondary DNS Server provided by the ISP<br>
Nato nastavimo še host:<br>
vim /etc/hosts<br>
Prvo vrstico zamenjamo z:<br>
127.0.0.1 nat localhost.localdomain localhost<br>
<h3>6. Omogoči posredovanje IP naslovov na NATServerju.</h3>
echo 1 > /proc/sys/net/ipv4/ip_forward
<h3>7. Nastavi NAT z uporabo paketa iptables na NATServerju.</h3>
apt-get install iptables<br>
iptables -F<br>
ptables -t nat -F<br>
iptables -t mangle -F <br>
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE<br>
iptables -A FORWARD -i eth1 -j ACCEPT<br><br>
service iptables restart
<h3>8. Na simpleArbiter z vlc preberi naslov, na katerem si lahko ogledaš kratek filmček. </h3> <br>
<h3>8. Dodatni viri </h3> <br>
-https://www.howtoforge.com/nat_iptables<br>
-http://www.bctes.com/nat-linux-iptables.html<br>
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