Cluster der kan alt/Routning og 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:
Uncomment it by removing the #. Now forwarding is enabled in the system kernel.
Start routing without a reboot
echo 1 > /proc/sys/net/ipv4/ip_forward
This will enable it 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:
edit the file /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.