To share the logon to Internet between two PC linux

Prerequisiti:

• two PC connected between they with a cable crossover (in my case PC desktop and laptop);
• PC desktop with two cards ethernet (eth0 connected to Internet and eth1 for the local net);
• linux on both the PC (for me hardy heron on the desktop and gutsy gibbon on laptop).

Configuration of the external card (eth0):

1. Dynamic configuration through dhcp;
2. Or to settare a static address; this my configuration:

• IP address: 10.0.1.20
• Netmask: 255.255.255.0
• Gateway: 10.0.1.1
• Primary DNS: 208.67.220.220
• Secondary DNS: 208.67.222.222.

Configuration files inner (eth1)

• IP address: 192.168.0.1
• Netmask: 255.255.255.0
• Gateway: 10.0.1.1
• Primary DNS: 208.67.220.220
• Secondary DNS: 208.67.222.222.

Configuration files of client (in the my case laptop)

• IP address: 192.168.0.2
• Netmask: 255.255.255.0
• Gateway: 192.168.0.1
• Primary DNS: 208.67.220.220
• Secondary DNS: 208.67.222.222.

Control of the setup

ping 192.168.0.2
PING 192.168.0.2 (192.168.0.2) 56 (84) bytes of date.
64 bytes from 192.168.0.2: icmp_seq=1 ttl=64 time=0.168 ms
64 bytes from 192.168.0.2: icmp_seq=2 ttl=64 time=0.139 ms
...........................................................................................

Installation and configuration of Firestarter

• I sudo apt-get install firestarter;
• to follow the wizard of configuration and to qualify “Enable Internet connection sharing”

Voilà ET!