Cluster der kan alt/Routning og NAT - Revision history

Heth: /* NAT */

2012-04-18T12:31:57Z

‎NAT

2012-04-18T12:30:14Z

‎NAT

2012-04-18T12:29:45Z

‎Start Routing

2012-04-18T12:29:23Z

‎Routning & NAT

2012-04-18T12:25:58Z

2012-04-18T12:25:37Z

Created page with "=Routning & NAT="

New page

=Routning & NAT=

@@ Line 35: / Line 35: @@
 Test it out on your other client.
 {{Source cli}}
-[[Categori:cluster]][[Categori:Ubuntu]]
+[[Category:cluster]][[Category:Ubuntu]]

@@ Line 25: / Line 25: @@
 Now that it’s saved we need to load the iptables.rules on starting the network:
-vi /etc/network/interfaces
+edit the file '''/etc/network/interfaces'''
-</source lang=cli>
+<source lang=cli>
 # The extended interfaces
 auto eth0

@@ Line 3: / Line 3: @@
 ==Start Routing==
-For this, we do not need to install anything new. Everything is right there but is currently disabled. First, edit /etc/sysctl.conf. Find this:
+For this, we do not need to install anything new. Everything is right there but is currently disabled. First, edit '''/etc/sysctl.conf'''. Find this:
 <source lang=cli>
 net.ipv4.ip_forward=1
@@ Line 13: / Line 13: @@
 </source>
 This will enable it without a reboot.
 ==NAT==
 <source lang=cli>

@@ Line 2: / Line 2: @@
 Configuring NAT (Sharing Internet)
 For this, we do not need to install anything new. Everything is right there but is currently disabled. First, edit /etc/sysctl.conf. Find this:
-#net.ipv4.ip_forward=1
+<source lang=cli>
 Uncomment it by removing the #. Now forwarding is enabled in the system kernel.
-Now write:
+===Start routing without a reboot===
 iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
 What this does is make a NAT rule for post-routing. It sets the eth0 as the output card (The one out to the internet) and sets source to it's own IP through MASQUERADE. Then write:
 Just to be sure, save it.
 iptables-save > /etc/iptables.rules
 Now that it’s saved we need to load the iptables.rules on starting the network:
 vi /etc/network/interfaces
 # The extended interfaces
 auto eth0
@@ Line 19: / Line 31: @@
 pre-up iptables-restore < /etc/iptables.rules
 post-down iptables-restore < /etc/iptables.rules
 Test it out on your other client.

← Older revision		Revision as of 12:25, 18 April 2012
Line 1:		Line 1:
	=Routning & NAT=		=Routning & NAT=
		+	Configuring NAT (Sharing Internet)
		+
		+	For this, we do not need to install anything new. Everything is right there but is currently disabled. First, edit /etc/sysctl.conf. Find this:
		+	#net.ipv4.ip_forward=1
		+	Uncomment it by removing the #. Now forwarding is enabled in the system kernel.
		+	Now write:
		+	iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
		+	What this does is make a NAT rule for post-routing. It sets the eth0 as the output card (The one out to the internet) and sets source to it's own IP through MASQUERADE. Then write:
		+	echo 1 > /proc/sys/net/ipv4/ip_forward
		+	This will enable it without a reboot.
		+	Just to be sure, save it.
		+	iptables-save > /etc/iptables.rules
		+	Now that it’s saved we need to load the iptables.rules on starting the network:
		+	vi /etc/network/interfaces
		+	# The extended interfaces
		+	auto eth0
		+	iface eth0 inet dhcp
		+	pre-up iptables-restore < /etc/iptables.rules
		+	post-down iptables-restore < /etc/iptables.rules
		+	Test it out on your other client.